Malicious PDF — malware analysis report

Static analysis result for SHA-256 40cb76c5b7a8beee…

MALICIOUS

PDF

27.1 KB Created: 2021-05-21 00:16:58 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 725da1e9c2369d78a1767a18bc9dd144 SHA-1: 20dbbbc130f436dfd939487beddae02d87d305aa SHA-256: 40cb76c5b7a8beee33a78ddf3b32bc4eaaa2048a746837046c20c59e8dbc4f7a
74 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF document was flagged as malicious by an ML classifier. The file routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6911

Heuristics 3

  • PDF links to a 'free generator / game hack' redirector high 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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/479516143/minecraft-free-download-windows-10-game-hack PDF link annotation
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off00002e8f.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2E8F 25584 bytes
SHA-256: fc73e7ce2393da70b0634bc236bf110311c440c616d8cdc4bb3bda552ad48230

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