Malicious PDF — malware analysis report

Static analysis result for SHA-256 9418cc465b25f950…

MALICIOUS

PDF

42.0 KB Created: 2021-06-11 11:20:13 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-12
MD5: d1812a543e0ac55036bbf7562a81bac2 SHA-1: c581081dcaed9774833e8e753b88a0578fd7285d SHA-256: 9418cc465b25f950921f81837ae60c39a3e8ee991c12d201ffdf084e10d9b5da
170 Risk Score

Machine Learning

  • Nyx PDF Classifier clean score 0.0286

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/mac-hacks-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_off00003a92.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3A92 25932 bytes
SHA-256: 6db53f181bdf25afdea187a78f42c27b49edebe997cb8ae9f766c9cab93d59cb
font_01_sfnt_off0000750d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x750D 5696 bytes
SHA-256: 450e3ee45915afe13702bf1d587eb8b9ad88a8d2113419ac9f2fd116a828e139
font_02_sfnt_off0000821f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x821F 18376 bytes
SHA-256: 8f5eae1069d1e6eff3b3214f6d5256ba967d6627a2c65e0827478290d8c5c64c

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