Malicious PDF — malware analysis report

Static analysis result for SHA-256 accd5ad768af4963…

MALICIOUS

PDF

29.8 KB Created: 2021-07-24 09:35:25 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: c81a9acfd6b6d362cfa7473c3e4d2db5 SHA-1: e91443249dfe2245cc9f96e297d1def69760eccf SHA-256: accd5ad768af4963eb5f489dc8ea7d11736ae9827ad3c592c94b75e5eeedd478
170 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'http://netcdn.tw/app/479516143/minecraft-free-download-game-hack'. This URL is associated with a lure for game hacks and is likely intended to present a fake CAPTCHA or verification prompt to trick the user. The document body also contains the same URL and a 'CLICK HERE TO ACCESS MINECRAFT GENERATOR' call to action, reinforcing the phishing lure.

Machine Learning

  • Nyx PDF Classifier clean score 0.0556

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 http://netcdn.tw/app/479516143/minecraft-free-download-game-hack In 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_off00002168.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2168 22352 bytes
SHA-256: 4ba601d0103cc376bcf71648a8437b557567f14614f988287d1500f851f4e683
font_01_sfnt_off000052f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x52F5 18292 bytes
SHA-256: eff5919d985126b8591bb7cd3dea6a103dcf6f67049ada279646be2986fdbf31

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