Malicious PDF — malware analysis report

Static analysis result for SHA-256 9372d610a025613a…

MALICIOUS

PDF

35.1 KB Created: 2021-05-24 08:59:59 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: a438db7b62f79134c193cf038f0f35b7 SHA-1: a62279f51c73846278f9b32dfb2a3a9960e9bce0 SHA-256: 9372d610a025613ad23b37c54883eaca6d0431b753bdbf52e3a66604e87ca247
82 Risk Score

Malware Insights

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

The PDF document contains a fake CAPTCHA lure and a call-to-action button, aiming to trick the user into clicking a malicious link. The embedded URLs point to domains hosting further PDF files, suggesting a multi-stage download or redirection chain. The ML classifier also flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9508

Heuristics 4

  • Fake CAPTCHA / human verification prompt high SE_FAKE_CAPTCHA
    Document displays a fake CAPTCHA or human-verification prompt — used to trick users into running commands or pressing keyboard shortcuts
  • 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/406889139/coin-master-free-spin-today-game-hack
    • http://fmbompastor.com.br/images/free-robux-cards_GM431946152.pdf
    • http://fmbompastor.com.br/images/win-free-robux_GM431946152.pdf
    • http://fmbompastor.com.br/images/roblox-promo-codes-generator-no-human-verification_GM431946152.pdf
    • http://fmbompastor.com.br/images/free-cheat-codes-for-coin-master_GM406889139.pdf
    • http://fmbompastor.com.br/images/how-to-hack-coin-master-ios_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off00002f3d.bin
06262aa74a0956911eec8806823b811598a7cf8d740482268f1e85aec80aef3b		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2F3D 24680 bytes
font_01_sfnt_off000067fd.bin
a96ac7afd25cadbabafd1b9dbf0a180d0c1833ed2d07acb4363f122556c39d20		 pdf-font-stream PDF embedded font (sfnt) at offset 0x67FD 18240 bytes

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