Malicious PDF — malware analysis report

Static analysis result for SHA-256 b46f37e660f47a36…

MALICIOUS

PDF

34.2 KB Created: 2021-05-22 04:39:58 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 436a46afb117c7d469c14e6a09b58a85 SHA-1: 31517d7317c52a443686c3cf4527ad0eaf6a908f SHA-256: b46f37e660f47a36f701bef4de1520f108eb4161c100968f7aa1056308d6dcfa
160 Risk Score

Malware Insights

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

The PDF document contains multiple links to known malicious redirectors, disguised as "free generator / game hack" lures. The document body explicitly mentions "Free Tiktok Like" and "CLICK HERE TO ACCESS TIKTOK GENERATOR", reinforcing the social engineering aspect. The presence of embedded URLs and the ML classifier's high confidence score indicate a malicious intent to redirect users to potentially harmful websites or initiate downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9508

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/free-tiktok-like-game-hack In PDF document text
    • http://eleveurs-autrement.fr/images/coin-master-free-spins-link-march-2021_GM406889139.pdfIn PDF document text
    • http://eleveurs-autrement.fr/images/free-spins-and-coins-coin-master_GM406889139.pdfIn PDF document text
    • http://eleveurs-autrement.fr/images/google-how-do-you-get-free-robux_GM431946152.pdfIn PDF document text
    • http://eleveurs-autrement.fr/images/roblox-hacking-website_GM431946152.pdfIn PDF document text
    • http://eleveurs-autrement.fr/images/minecraft-mods-download-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
stream_002_off00002e58.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2E58 24656 bytes
SHA-256: f5aec576fc1bff83b27de5f33c76cf63ad6866ecef897a92bd7bf50884af39f7
font_01_sfnt_off000066b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x66B5 17456 bytes
SHA-256: 2612e5e228ce8c424fcb3a100408051ce9a88b2c89e0201ab469a717737f635a

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