Malicious PDF — malware analysis report

Static analysis result for SHA-256 5bcee1dd55c24ba6…

MALICIOUS

PDF

32.5 KB Created: 2021-05-20 16:22:04 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24
MD5: ad4f7484186600085a6df506c7a2a3e4 SHA-1: 08445a539976c579eef1b3d99c60277e6f7be7c5 SHA-256: 5bcee1dd55c24ba639bb942f282b26ed4188f5de6c737dece1d70c3fe2e2537b
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' or 'game hack' for TikTok likes. The document body and metadata confirm the use of wkhtmltopdf, and the presence of multiple malicious redirector links indicates a clear intent to lure users to a potentially harmful site. No scripts were extracted, but the primary attack vector is the malicious link.

Machine Learning

  • Nyx PDF Classifier clean score 0.0622

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/get-free-tiktok-likes-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_off00002986.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2986 23872 bytes
SHA-256: dca2dd603a6e713f555024789512f4a6775ce29c95cd464ff850fde5086dee1c
font_01_sfnt_off0000602f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x602F 17456 bytes
SHA-256: c397690cc80b7cdd5818f6212e28c5067632df1cbe38d70f20361ec61b14abd9

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