Malicious PDF — malware analysis report

Static analysis result for SHA-256 65bd36ad359279b0…

MALICIOUS

PDF

35.1 KB Created: 2021-05-23 01:44:00 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 623765602c6c1715bd41290877b9d93d SHA-1: 70d32fac001de7e1a99fffc409f25e8674f28ecf SHA-256: 65bd36ad359279b00a6cfa7f5ed8fb885897dd6853317e655ad97b10f422bdc7
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a lure for free TikTok followers and game hacks, directing users to a malicious URL. The ML classifier also flagged the PDF as malicious. The embedded URL is the primary indicator of compromise, likely leading to a second-stage download or redirect.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9399

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-followers-for-free-game-hack In PDF document text
    • http://www.cbgp.upm.es/images/minecraft-account-hacked_GM479516143.pdfIn PDF document text
    • http://www.cbgp.upm.es/images/free-tiktok-hearts_GM835599320.pdfIn PDF document text
    • http://www.cbgp.upm.es/images/minecraft-java-edition-free_GM479516143.pdfIn 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_off00003086.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3086 25164 bytes
SHA-256: 3009913c6746005dd7e57408bdbeefb3482c63702b0506501ba26a95e6c6e73d
font_01_sfnt_off000069e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x69E5 17692 bytes
SHA-256: 1b1e1c30a9592b0fb91196253d93c27419259905b41c1e14a3654a7d7056ebb4

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