Malicious PDF — malware analysis report

Static analysis result for SHA-256 cd09cb2ddcf01c29…

MALICIOUS

PDF

36.8 KB Created: 2021-05-24 17:17:13 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: a6de1e819e074cfb6947d466d2694510 SHA-1: 728d370fe1b28f3ca77c761f92acb944a2609eef SHA-256: cd09cb2ddcf01c296c3ab0ed6395958fa341ee2db72dc7b262ea2dbed9dec38d
82 Risk Score

Malware Insights

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

The PDF document displays a fake CAPTCHA and a download button to trick the user into clicking a link. The embedded URL and other URLs point to websites offering game-related hacks, suggesting a phishing or scam attempt. While no scripts were explicitly extracted, the ML classifier and fake CAPTCHA heuristic strongly indicate malicious intent, likely involving a client-side exploit or redirection to a malicious site.

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/is-it-possible-to-get-free-robux-game-hack
    • https://verstricktundzugenaeht.com/images/roblox-rape-hack_GM431946152.pdf
    • https://verstricktundzugenaeht.com/images/coin-master-daily-free-spins-2021_GM406889139.pdf
    • https://verstricktundzugenaeht.com/images/free-robux-accounts_GM431946152.pdf
    • https://verstricktundzugenaeht.com/images/roblox-arsenal-hack_GM431946152.pdf
    • https://verstricktundzugenaeht.com/images/spin-and-coin_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off000032b7.bin
2cb48cdceb45c34ced93d09fac73740be620a8394988fe19a679af467b5344f9		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x32B7 25752 bytes
font_01_sfnt_off00006e39.bin
524b785793646940a6547919a11f6df6f4967036cf63710b5a4934c88ca16ae7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6E39 18464 bytes

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