Malicious PDF — malware analysis report

Static analysis result for SHA-256 91ff7ea355ab691f…

MALICIOUS

PDF

94.3 KB Created: 2021-07-07 04:09:54 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24
MD5: e4adff04949a66082fc7f53f00d63fd0 SHA-1: 7aea2851fff23215363842036ac7d07d3483d23d SHA-256: 91ff7ea355ab691fbb84a4521e6c94cd35f9f5e7a4a59eab3a0779019e4eadb2
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 'game hack' or 'free generator'. The heuristics indicate that these links are designed to lure users to potentially harmful websites. While no scripts were extracted, the presence of malicious redirector links strongly suggests an attempt to deliver a payload or phish for credentials.

Machine Learning

  • Nyx PDF Classifier clean score 0.0139

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-nasl-alnr-game-hack In PDF document text

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