An injected iframe refers to an HTML frame embedded within a web page that loads content from an external or malicious domain without the user’s awareness. Attackers often inject such iframes to silently load phishing pages, malware payloads, or exploit kits while the visible page appears legitimate.
Three questions every analyst asks before acting on this signal.
An injected iframe refers to an HTML frame embedded within a web page that loads content from an external or malicious domain without the user’s awareness. Attackers often inject such iframes to silently load phishing pages, malware payloads, or exploit kits while the visible page appears legitimate.
Because it allows threat actors to deliver malicious content in the background or overlay fake interfaces on legitimate websites. Even if the main page appears safe, a hidden iframe connected to a malicious domain can execute drive-by downloads, data exfiltration, or credential harvesting.
A realistic shape of the entry the engine appends to the risk_signals array when this signal fires. Evidence keys are subgroup-default; per-signal overrides documented in the API reference.
{
"slug": "iframe_injected",
"name": "Injected Iframe",
"group": "http_crawling_history",
"subgroup": "web_behavior_structure",
"direction": "malicious",
"evidence": {
"url_shortener_chain": false,
"auto_refresh_seconds": null,
"direct_ip_link": false,
"browser_interaction_required": true
}
}7 other signals share the same subgroup. They detect related behaviors and often co-fire on the same IOC.
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