Malicious PDF — malware analysis report

Static analysis result for SHA-256 89ff908d883c7f9d…

MALICIOUS

PDF

10.7 KB Created: 2021-05-14 12:53:56 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-25
MD5: e5ffff5dc0cc4cb09d722f15bf7044de SHA-1: dc830f2c4868487efa74c31d2075b4246068a8c2 SHA-256: 89ff908d883c7f9dc8e075750482ca7d1dfd28b22688dde5a077bcae1c3d2799
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document uses a lure related to 'free admin Roblox' and 'free robux' to trick users into clicking embedded links. These links redirect to malicious infrastructure, indicating a phishing or scam attempt. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9959

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 https://netcdn.xyz/app/431946152/free-admin-roblox-game-hack In PDF document text
    • https://mbbs.hr/files/claim-free-robux_GM431946152.pdfIn PDF document text
    • https://mbbs.hr/files/free-roblox-svg_GM4In PDF document text

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