Malicious PDF — malware analysis report

Static analysis result for SHA-256 8c8f0b8d1e2265c5…

MALICIOUS

PDF

33.4 KB Created: 2021-05-22 17:35:40 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-24
MD5: c9f41d9959eab69c42426da546700655 SHA-1: 09938207eb8ab7759c0ab4c2aa0ffc4c502ef42f SHA-256: 8c8f0b8d1e2265c58cb265b2d8d30a0b50106f0558587cafb56d742083d37877
130 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded links that redirect to known malicious infrastructure, specifically advertising a 'free generator / game hack'. The document body also contains a prominent call to action to 'CLICK HERE TO ACCESS TIKTOK GENERATOR', reinforcing the lure. While no scripts were directly extracted, the PDF structure and malicious links strongly indicate a phishing or scam attempt designed to lead the user to a compromised site.

Machine Learning

  • Nyx PDF Classifier clean score 0.0718

Heuristics 4

  • 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.
  • 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.xyz/app/835599320/tiktok-like-bot-free-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
stream_002_off00002b1b.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2B1B 24408 bytes
SHA-256: d44bfd8f1d284dc508504c7f9e6a837122001fb2351a1ffc2eebdb7e6218b2fc
font_01_sfnt_off00006351.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6351 17672 bytes
SHA-256: 4586a179c1ee4dcb7242a6ebe5d9b9be55f6b3291c614cdd8b5fef0fe9e318cf

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