Malicious PDF — malware analysis report

Static analysis result for SHA-256 a7acb9a582684a7a…

MALICIOUS

PDF

38.6 KB Created: 2021-05-23 02:27:41 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 7c31c2d61f22e884470475e550ca7827 SHA-1: be73a10d38b246f6089ce76c30b1e94e4cf94bd9 SHA-256: a7acb9a582684a7a8ae5fbdb727754236aee3fb1d559038684f4682d8673be5f
82 Risk Score

Malware Insights

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

The PDF document presents a fake CAPTCHA or human verification prompt to trick users into clicking a link. The primary link, 'https://netcdn.xyz/app/431946152/how-to-get-free-robux-easy-2021-game-hack', is associated with a lure for free Robux, indicating a potential scam or malware distribution. While no scripts were explicitly extracted, the PDF structure and embedded links suggest an attempt to exploit user interaction for malicious purposes.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9476

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/how-to-get-free-robux-easy-2021-game-hack
    • https://e-learningmin10jakarta.com/__statics/gudangsoal/files/wurst_GM479516143.pdf
    • https://e-learningmin10jakarta.com/__statics/gudangsoal/files/minecraft-pe-free-download-ios-no-jailbreak_GM479516143.pdf
    • https://www.e-learningmin10jakarta.com/__statics/gudangsoal/files/coin-master-heaven-free-spins-link_GM406889139.pdf
    • https://e-learningmin10jakarta.com/__statics/gudangsoal/files/hack-game-plus-com-coin-master_GM406889139.pdf
    • https://e-learningmin10jakarta.com/__statics/gudangsoal/files/free-coin-master-spins-link-download_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off000033e0.bin
4bad70516d7865b0aadf8f85a103f4d4b6a0e24089e68112fda4f976e6cd6784		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x33E0 28152 bytes
font_01_sfnt_off00007339.bin
b4f5bd8c8985fe06cb8cafea7c6a35db41ab3230d9b691422e9309a9df735677		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7339 19092 bytes

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