restricted content Category - Web Filtering Database | Detect restricted content Domains

How restricted content Domains Are Identified

restricted content domains are websites designed to deceive users into revealing sensitive information by impersonating trusted brands, services, or individuals. Our classification engine identifies these deceptive domains through a multi-layered analysis pipeline that examines visual appearance, URL structure, content patterns, and behavioral signals.

Modern restricted content campaigns are sophisticated operations. Attackers register domains that closely resemble legitimate brands using techniques like typosquatting (micorosoft.com), homograph attacks (using Unicode characters that look identical to Latin letters), and subdomain abuse (login.paypal.com.malicious-domain.net). Our detection algorithms identify all these evasion techniques.

Within our database of over 90 million categorized domains, restricted content is one of the fastest-growing content risk categories. New restricted content domains appear at a rate of over 10,000 per day, with average lifespans of less than 48 hours. Speed of detection is therefore critical, and our pipeline classifies new restricted content domains within minutes of their first appearance in the wild.

restricted content Techniques We Detect

Comprehensive coverage across all known restricted content attack vectors and social engineering strategies

Brand Impersonation

Domains mimicking major brands like banks, tech companies, and e-commerce platforms. Our visual comparison engine analyzes page layouts, logos, and color schemes against a library of over 5,000 brand templates to detect impersonation attempts even when the URL appears unrelated to the target brand.

Credential Harvesting

Login pages designed to capture usernames, passwords, and multi-factor authentication tokens. We detect credential harvesting forms by analyzing form fields, submission endpoints, and page behavior. This includes advanced attacks using real-time proxy techniques that relay credentials to legitimate sites while capturing them.

Business Email Compromise

Domains supporting CEO fraud and invoice redirect attacks targeting corporate finance teams. BEC restricted content sites host fake portals that appear to be internal systems, cloud email platforms, or vendor payment pages. Our analysis identifies domains registered specifically for targeted BEC campaigns.

SMS restricted content (Smishing)

Short domains and redirects optimized for mobile restricted content campaigns delivered via text message. These domains often use URL shorteners, open redirects, or numeric domain names. We track the full redirect chain to classify the final landing page, not just the initial link.

QR Code restricted content (Quishing)

Domains embedded in malicious QR codes placed in emails, physical locations, and documents. As QR-based attacks bypass traditional email URL scanning, domain-level filtering provides a critical defense layer. Our database tracks domains commonly distributed through QR restricted content campaigns.

Cloud Service Abuse

restricted content pages hosted on legitimate cloud platforms like Azure, AWS, Google Cloud, and collaboration tools. Attackers exploit trusted infrastructure to bypass IP reputation filters. We detect restricted content content on shared hosting regardless of the underlying platform reputation.

Real-Time Detection Pipeline

Our multi-stage analysis identifies restricted content domains faster than traditional blocklist approaches

Certificate Monitoring

CT log analysis

URL Lexical Analysis

Pattern recognition

Visual Similarity

Screenshot comparison

HTML Analysis

Form & script inspection

Infrastructure Mapping

Hosting cluster analysis

ML Scoring

Ensemble model classification

Community Reports

Crowdsourced intelligence

Continuous Re-scan

Lifecycle monitoring

From Detection to Blocking in Seconds

When a new domain is registered that matches our restricted content heuristics, it enters our high-priority analysis queue. Certificate Transparency log monitoring gives us visibility into newly issued SSL certificates, which is often the first signal that a restricted content domain is being prepared for an attack.

The URL undergoes lexical analysis to identify brand name variations, suspicious TLD usage, and known restricted content URL patterns. Simultaneously, our headless browser renders the page to capture a screenshot for visual similarity comparison against our brand template library.

HTML and JavaScript analysis inspects form actions, credential submission endpoints, and obfuscation techniques. The combined signals produce a restricted content classification detail. Domains scoring above our threshold are classified immediately and propagated to all API consumers within 60 seconds.

restricted content Category Statistics

Real-time metrics from our restricted content domain intelligence platform

3.8M+

restricted content Domains Identified

99.3%

Detection Accuracy

10K+

New restricted content Domains per Day

5,000+

Brands Monitored

Common restricted content Domain Patterns

Examples of deceptive domain naming techniques our system detects

secure-bankofamerica-login.com Brand name in subdomain/path deception

micorosft365-verify.net Typosquatting with plausible misspelling

paypa1-account-update.org Homograph attack using number substitution

apple-id-suspended-verify.click Urgency trigger with brand name

netflix-billing-update247.top Subscription service impersonation

dhl-package-tracking-id.info Shipping notification restricted content

Integration Guide for restricted content Protection

Deploy restricted content domain blocking across your email gateway, web proxy, and DNS infrastructure

Multi-Layer restricted content Defense

Effective restricted content protection requires blocking at multiple layers. Our API integrates with email security gateways to scan links in incoming messages before they reach user inboxes, catching restricted content URLs embedded in emails, attachments, and calendar invitations.

At the web proxy layer, our domain classification prevents users from reaching restricted content sites even if they click a link that bypassed email filtering. DNS-level integration provides the broadest protection, blocking restricted content domain resolution across all applications and devices on the network.

For organizations building custom security tools, our real-time streaming API delivers new restricted content classifications as they are confirmed. This enables security orchestration platforms, SOAR playbooks, and custom browser extensions to respond to content risks instantly.

Email gateway integration via URL rewriting
Web proxy ICAP/ECAP protocol support
DNS RPZ feed for recursive resolver blocking
Real-time WebSocket streaming for new detections

restricted content Domain Check API

// Check domain for restricted content classification
curl -X GET "https://api.webfilteringdb.com/v1/lookup" \
  -H "Authorization: Bearer YOUR_API_KEY" \
  -d '{"domain": "secure-banklogin.xyz"}'

// Response
{
  "domain": "secure-banklogin.xyz",
  "categories": ["restricted content"],
  "restricted content_type": "credential_harvest",
  "target_brand": "Generic Banking",
  "confidence": 0.97,
  "first_seen": "2025-12-01T08:15:00Z",
  "action": "block"
}

Email Gateway Integration

import re, requests

def scan_email_urls(email_body):
    urls = re.findall(r'https?://([^/\s]+)', email_body)
    for domain in urls:
        resp = requests.get(
            "https://api.webfilteringdb.com/v1/lookup",
            headers={"Authorization": "Bearer KEY"},
            params={"domain": domain}
        )
        if "restricted content" in resp.json().get("categories", []):
            quarantine_email(email_body)
            return True
    return False

Related Security Categories

Build a comprehensive content risk filtering policy by combining multiple categories

Stop restricted content Attacks Before They Reach Users

Deploy enterprise-grade restricted content protection with our API. Real-time detection of brand impersonation, credential harvesting, and social engineering domains.

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restricted content Domain Detection