Malicious PDF — malware analysis report

Static analysis result for SHA-256 94a9f6afa408ac01…

MALICIOUS

PDF

63.5 KB Created: 2021-07-07 07:27:03 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 38c674454b447f8e0f3d83d3ae8caba9 SHA-1: a7521c1a8a84664c5ce6510131f8357db8d99b17 SHA-256: 94a9f6afa408ac01401bb4c70ae4b27fad596f6b5815386bf0be5c29c194f2c7
122 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains multiple links to a redirector disguised as a 'free generator / game hack' for PUBG. This lure is a common tactic to trick users into visiting malicious sites. The file's metadata indicates it was generated by wkhtmltopdf, and the embedded content, though heavily obfuscated, contains references to the lure URL. No scripts were extracted, but the presence of malicious redirector links strongly suggests a phishing or scam attempt.

Machine Learning

  • Nyx PDF Classifier clean score 0.1000

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-price-game-hack In PDF document text

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