Malicious PDF — malware analysis report

Static analysis result for SHA-256 d0f290d4a94e6553…

MALICIOUS

PDF

36.8 KB Created: 2021-05-24 07:17:28 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 8dbfa0b8912301c27f8e45beb147a6b7 SHA-1: e51c832c31e43c05d504245400b15dcd7a4b6508 SHA-256: d0f290d4a94e6553600050a3549234e4c54124d662e3d73df2cdd5302ada7a20
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious File

The PDF document contains embedded URLs and a call-to-action phrase, 'CLICK HERE TO ACCESS TIKTOK GENERATOR', which, combined with the 'Browser extension / update installation lure' heuristic, strongly suggests a social engineering attempt to trick the user into downloading a malicious file. The ML classifier also flagged this PDF as malicious with high confidence. No scripts were extracted, but the presence of external URLs indicates a potential download or redirection to a malicious payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9447

Heuristics 4

  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • 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
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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-likes-and-followers-game-hack
    • https://marielyst-grundejerforening.dk/images/free-coins-for-coin-master_GM406889139.pdf
    • https://marielyst-grundejerforening.dk/images/how-to-get-free-spins-on-coin-master-2021_GM406889139.pdf
    • https://marielyst-grundejerforening.dk/images/how-to-get-minecraft-java-for-free_GM479516143.pdf
    • https://marielyst-grundejerforening.dk/images/minecraft-dungeons-free_GM479516143.pdf
    • https://marielyst-grundejerforening.dk/images/coin-master-hack-tool-v1-9-download-free-pc_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off000033b0.bin
2556ecdeeec383c6307aa051b3870551493f784be24bef1cc51fa4fbb9258fd9		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x33B0 26600 bytes
font_01_sfnt_off00006fd7.bin
d80a5b590fc1f536f9a9d288da246cac59e10184b672ed9828d0991e5480315e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6FD7 17868 bytes

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