Malicious PDF — malware analysis report

Static analysis result for SHA-256 71b8b42f4140b9c6…

MALICIOUS

PDF

143.8 KB Created: 2021-07-03 15:38:59 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 3fa5e02625bc326f365b53589c725c83 SHA-1: 5304643752e97291f882e917fc74ff3cfc240e4c SHA-256: 71b8b42f4140b9c60b10c52594481e82c2f0dda5769763370bb10875206e7948
122 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded links that are identified as malicious redirectors, specifically targeting users with a lure related to game hacks. The primary heuristic indicates a critical risk due to these links pointing to known malicious infrastructure. No scripts were extracted, but the presence of malicious links suggests an attempt to redirect users to a phishing or malware distribution site.

Machine Learning

  • Nyx PDF Classifier clean score 0.0080

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-exchange-game-hack In PDF document text