Malicious PDF — malware analysis report

Static analysis result for SHA-256 f8d8c7d8a206c9c0…

MALICIOUS

PDF

1.4 KB Created: 2021-06-06 23:31:28 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-07
MD5: eaac9419c2d76c70785f203084a98fab SHA-1: b5e723b28585f3072b401f16c8496440b40d7780 SHA-256: f8d8c7d8a206c9c012eb374e34a437e5770e4e36aa1110ed6bd300cdc2dbe8be
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains a lure for 'Free Robux' and includes a link to a known malicious redirector. This suggests a phishing attempt to trick users into visiting a potentially harmful website. Although no scripts were explicitly extracted, the PDF structure and embedded URL are indicative of a social engineering attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9100

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.tw/app/431946152/free-robux-no-hacking-account-game-hack In PDF document text

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