Malicious PDF — malware analysis report

Static analysis result for SHA-256 e75eb2a5044c5085…

MALICIOUS

PDF

36.8 KB Created: 2021-05-14 16:30:04 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 2781256362aa6c748b08e28fc54a266b SHA-1: 0c3ee963c8cb298c871e86fa9e9269bba36326e7 SHA-256: e75eb2a5044c5085cb9fc29484471c4c41e26f7a0aee18bac86d661a9f1458b6
92 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a high-confidence heuristic firing for a 'free generator / game hack' lure, directing users to a suspicious URL. The document body and metadata confirm the lure's theme. The presence of a fake CAPTCHA heuristic suggests a multi-stage social engineering attack designed to trick the user into performing an action, likely to download a secondary payload or complete a phishing task.

Machine Learning

  • Nyx PDF Classifier clean score 0.0312

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.
  • Fake CAPTCHA / human verification prompt high SE_FAKE_CAPTCHA
    Document displays a fake CAPTCHA or human-verification prompt — used to trick users into running commands or pressing keyboard shortcuts
  • 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.xyz/app/431946152/how-to-get-free-robux-on-iphone-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
font_00_sfnt_off00003240.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3240 25496 bytes
SHA-256: b9db6e7dffbc0c28b698f57e396ad5a0494bd7a75e04c3d7039aeff864a84d7f
font_01_sfnt_off00006d61.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6D61 18624 bytes
SHA-256: 22426b865d680281cc4768d4f40ba725f59186fc510e45c7c95a1e6bea128c39

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