Malicious PDF — malware analysis report

Static analysis result for SHA-256 10a5eb5ab62b442a…

MALICIOUS

PDF

30.8 KB Created: 2021-07-19 08:19:54 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 76bda6e5ec63ee36e6dae97d675e5567 SHA-1: 14e423629bd9a19fc825f601f02df5db06929a32 SHA-256: 10a5eb5ab62b442a07546c80beeec9233a021c4a5057d5ac6334e267a955da0a
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a high-severity heuristic firing for a game hack redirect lure, pointing to a suspicious URL. The document body also contains this URL and a call-to-action phrase, suggesting a phishing or scam attempt. While no scripts were explicitly extracted, the PDF structure and embedded URI indicate an attempt to redirect the user to a malicious site, likely for further exploitation or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8477

Heuristics 4

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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 http://netcdn.tw/app/406889139/coin-master-daily-free-spins-link-app-game-hack PDF link annotation
    • https://gzhi.govvrn.ru/uploads/ckfinder/userfiles/files/free-minecraft-mods_GM479516143.pdfIn PDF document text
    • https://gzhi.govvrn.ru/uploads/ckfinder/userfiles/files/minecraft-ps4-free_GM479516143.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000023bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x23BD 22588 bytes
SHA-256: 05472316d8adbb99e50f68d2b3281c5c20de2dabec840983d3c976ffbd8539c2
font_01_sfnt_off00005624.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5624 18476 bytes
SHA-256: 8af254e049fcccc1442405a550d0e3ce0b782d3872c3c9d4c1baf9e82e1cff79

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