Malicious PDF — malware analysis report

Static analysis result for SHA-256 6476ba127fef6a5e…

MALICIOUS

PDF

38.3 KB Created: 2021-05-24 06:21:42 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 88e7f7307f3e61fc549d1d7a2495a065 SHA-1: 541540681aad9daad5c090b6f644f1c08a11651d SHA-256: 6476ba127fef6a5e12d836ffe639069c33db4b04836318a07243203f04117a1b
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 prominent 'CLICK HERE TO ACCESS ROBLOX GENERATOR' call to action, directing users to malicious URLs. The ML classifier also flagged this PDF as malicious. These elements suggest the document is designed to trick users into downloading or executing further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9407

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/431946152/robux-match.com-free-robux-game-hack
    • http://fotoflas.gr/images/free-roblox-accounts-with-robux-that-work-2021_GM431946152.pdf
    • http://fotoflas.gr/images/coin-master-free-spins-link-without-human-verification_GM406889139.pdf
    • http://fotoflas.gr/images/coin-master-hacks_GM406889139.pdf
    • http://fotoflas.gr/images/how-to-get-free-robux-fast-and-easy_GM431946152.pdf
    • http://fotoflas.gr/images/free-robux-no-offers_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off00003323.bin
a78d409ddc6c54b2d52215b9941e458d37e5cb91169c89013b5cfeda2b9007cd		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3323 27988 bytes
font_01_sfnt_off000072c9.bin
4a85ad6ffc73ad9b3f41fceca22de32e3ce7595015d69f53ae753139e52ac9f7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x72C9 18904 bytes

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