Malicious PDF — malware analysis report

Static analysis result for SHA-256 6dd97b628502a9f9…

MALICIOUS

PDF

37.5 KB Created: 2021-05-25 08:02:02 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 3c56bef25900f5b038f084c14f85d001 SHA-1: cc771e317492017b4b7908b8b2ebe33ef6b7f5f4 SHA-256: 6dd97b628502a9f9f8096767d6688afabbb5746799dccc3447f864a9c5d31d84
82 Risk Score

Malware Insights

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

The document presents a fake CAPTCHA and a call-to-action to trick users into clicking a link for a 'Free Robux Generator'. This is a common social engineering tactic to lead users to malicious websites or downloads. The embedded URLs and the document body content strongly suggest a phishing or scam attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9447

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/free-robux-without-human-verification-2021-game-hack
    • http://unifieo.br/images/how-to-free-robux_GM431946152.pdf
    • http://unifieo.br/images/coin-master-free-link-today_GM406889139.pdf
    • http://unifieo.br/images/free-robux-discord-servers_GM431946152.pdf
    • http://unifieo.br/images/free-robux-no-gift-card_GM431946152.pdf
    • http://unifieo.br/images/free-fans-on-tiktok_GM835599320.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off00003434.bin
da4f126d297558b5ace6926400df846cff4f4ffce2cc3143afba832632745e6d		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3434 24788 bytes
font_01_sfnt_off00006d32.bin
5c907f8fc0171ac382cbe47737dfe307495a07ea2f2097b2a41ed37680731fb3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6D32 19624 bytes

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