Malicious PDF — malware analysis report

Static analysis result for SHA-256 cd7804b2bbe3aef7…

MALICIOUS

PDF

48.7 KB Created: 2021-06-10 14:17:11 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-19
MD5: c49733ad697da05148681b27447f41df SHA-1: 766712c643a2881afc2f8dbb42d6067ad7949817 SHA-256: cd7804b2bbe3aef753c9dd2aac9c8e111ca2ad3c999dc730e06bd8be8018eaa5
170 Risk Score

Machine Learning

  • Nyx PDF Classifier clean score 0.0338

Heuristics 5

  • 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.
  • 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
  • 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/best-free-injectors-for-roblox-game-hack In PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00003fc6.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3FC6 36944 bytes
SHA-256: 23e81916608590ace94e7f46e2c9a3a6e6f9200e77a91b970fd58d29b9578c92
font_01_sfnt_off0000921c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x921C 3400 bytes
SHA-256: 4b3e0f36ad1e0c7e3ea5c178fd2b4f097d1e01575fc6a4101a8b520db34dfe07
font_02_sfnt_off00009d46.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9D46 18240 bytes
SHA-256: c50993464fb6259ae25e468f1c5baa2ef9fcbf92fd3637996b5c3b50b06a1c79

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