Malicious PDF — malware analysis report

Static analysis result for SHA-256 f63a5d00663d30a9…

MALICIOUS

PDF

42.7 KB Created: 2021-04-22 22:13:59 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: ccf8e2c598b45c2332c0621e4f7d05b9 SHA-1: 367e38b8bb1bcdfff03890f999d38760916518f1 SHA-256: f63a5d00663d30a9d613eff42f7d1fb518fbc8578827ee6ce43c5a1cc964e408
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 User Execution: Malicious File

The PDF document contains a lure to install a browser extension or viewer, and presents a call-to-action button to download a Roblox hack. It embeds multiple URLs pointing to sites offering game cheats and exploits, suggesting a social engineering attack to trick users into downloading potentially malicious files. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9941

Heuristics 4

  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • 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://netsecure.pro/app/431946152/hack-roblox-game-tower-battle-game-hack
    • http://webstan.be/images/cheeky-face-free-roblox.pdf
    • http://webstan.be/images/free-robux-every-5-seconds.pdf
    • http://webstan.be/images/roblox-how-to-get-unlimited-free-robux-and-obc.pdf
    • http://webstan.be/images/roblox-jaubreak-hack-script-auto-rob.pdf
    • http://webstan.be/images/free-robux-november-2021.pdf
    • http://webstan.be/images/claim-free-robux-com.pdf
    • http://webstan.be/images/how-to-get-free-robux-without-putting-in-your-password.pdf
    • http://webstan.be/images/how-to-hack-any-roblox-account.pdf
    • http://webstan.be/images/how-to-get-free-stuff-roblox-march-2021.pdf
    • http://webstan.be/images/robuxian-hat-ives-off-1m-robux-free.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off0000435d.bin
1c9ffa2e2b79457e552f751d7c1b8f259aeda26debe600b98592b72d52da89e4		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x435D 28480 bytes
font_01_sfnt_off000083b1.bin
c674eb0c927c29d2ddf8dd8dbeb16641b899c67cae063092079bc8f7d6ceb7d6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x83B1 18708 bytes

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