Malicious PDF — malware analysis report

Static analysis result for SHA-256 6703e78eed7cfb77…

MALICIOUS

PDF

159.5 KB Created: 2021-07-05 19:44:31 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-20
MD5: a94241e61b7106cc00ab58230cab5157 SHA-1: d778d088c94c268519ecce838e39d89375a04127 SHA-256: 6703e78eed7cfb773f38c19b6cad25d2f878326fdebd1e37ca6e7d66a54f2df9
122 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains embedded links that redirect to known malicious infrastructure, specifically advertising a 'free generator / game hack'. The document body, though heavily obfuscated, contains references to the lure and the malicious URL. No scripts were extracted from this sample, but the presence of malicious redirector links indicates an attempt to lead the user to a potentially harmful site.

Machine Learning

  • Nyx PDF Classifier clean score 0.0058

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-voucher-redeem-game-hack In PDF document text

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