Malicious PDF — malware analysis report

Static analysis result for SHA-256 4b3618cdd2a215f4…

MALICIOUS

PDF

15.6 KB Created: 2021-06-27 03:28:54 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 524a9b96f9c6c86492bcf1510314fb98 SHA-1: 3fccf337a29dd2cec0dfbd88d7c1bb474ae67371 SHA-256: 4b3618cdd2a215f4076f4cb11df22164755676a5c4ff799a71952fe7820c67ad
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF document contains lures related to game hacks and free currency, directing users to external URLs. The heuristic 'PDF_SEO_LINK_FARM' indicates the presence of numerous external PDF links, suggesting a link farm or SEO manipulation tactic. The ML classifier also flagged the PDF as malicious with high confidence.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9912

Heuristics 4

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • PDF links to a 'free generator / game hack' redirector high PDF_GAME_HACK_REDIRECT_LURE
    PDF's clickable action targets a redirector of the form /app/<id>/<slug>-game-hack — the landing-page shape of a large SEO 'free spins / generator / game hack' lure family that funnels victims through rotating disposable hosts to a malware/scam payload. The multi-link variants also trip ML/link-farm rules; this catches the single-link variants that otherwise score clean.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://netcdn.co/app/431946152/como-robar-cualquier-cuenta-de-roblox-hack-game-hack PDF link annotation
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