Malicious PDF — malware analysis report

Static analysis result for SHA-256 136265eaf4d900d8…

MALICIOUS

PDF

136.0 KB Created: 2021-07-04 13:39:24 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: a8c2854bfea634539d03c865dbe0fa43 SHA-1: af5954b6c0abe2d000bf1ba94e2d9261c40b4127 SHA-256: 136265eaf4d900d8ad47e8cfb50587f0e4721ad5eba1181e64b80ec1aaa9dd63
122 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to a known malicious redirector infrastructure, disguised as a game hack generator. The document body, though heavily obfuscated, contains references to 'Pubg Uc 2021' and the malicious URL, reinforcing the lure. No scripts were extracted, but the embedded links are sufficient to indicate a phishing or scam attempt.

Machine Learning

  • Nyx PDF Classifier clean score 0.0111

Heuristics 3

  • PDF links to a 'free generator / game hack' redirector critical 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. CRITICAL on its own: the /app/<id>/<slug>-game-hack path shape is unambiguous scam infra, and the host rotates so a host-list match can't be relied on.
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.tw/app/1330123889/pubg-uc-2021-game-hack In PDF document text

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