Malicious PDF — malware analysis report

Static analysis result for SHA-256 f8a2f4a89c7ca9c0…

MALICIOUS

PDF

38.7 KB Created: 2021-06-06 23:26:17 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 5a0e6c0faa2abba4adc3d9ec8a57220b SHA-1: 194fd4d3cdb2759d69105deb88c179fb78e21d9e SHA-256: f8a2f4a89c7ca9c0972cfc126a600f64f8d0086218f0b52b2763ae8148fda811
60 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a lure for free Roblox items, directing users to a suspicious URL. This URL is identified as a game hack redirector, indicating a phishing or scam attempt. The document's structure and embedded link suggest it is intended to trick users into visiting a malicious site, likely for credential harvesting or malware distribution.

Machine Learning

  • Nyx PDF Classifier clean score 0.0331

Heuristics 5

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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 https://netcdn.tw/app/431946152/all-66-free-items-roblox-game-hack PDF link annotation
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00003901.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3901 25832 bytes
SHA-256: f183f3ba6e23b9da09ff356a891899847403a8c24b9b390cb1461a960cd118f8
font_01_sfnt_off00007513.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7513 18480 bytes
SHA-256: 36da74caac4f4939a0987e5c6d39b691124af86cf5115a64635a27603718ea73

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