Malicious PDF — malware analysis report

Static analysis result for SHA-256 92b72516536cedc5…

MALICIOUS

PDF

45.1 KB Created: 2021-06-04 03:48:42 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 0afd6f88aad27fe89f5eeb4ec6445a27 SHA-1: 9dabd18a35e9042cb6d6227f39578771e76c372f SHA-256: 92b72516536cedc57feb44b69dbf1fda20efeae55c14b014b1b4e2a239761916
82 Risk Score

Malware Insights

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

The PDF document contains a fake CAPTCHA lure, designed to trick users into interacting with the document, likely to download a second-stage payload. The embedded URL, https://netcdn.online/app/431946152/robuxglobalcom-game-hack, is highly suspicious and likely hosts the malicious payload. While no scripts were explicitly extracted, the presence of PDF URI and ML classifier firings indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

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.online/app/431946152/robuxglobalcom-game-hack
    • http://opac.kolejkrim.edu.my/repository/how-do-u-hack-roblox_GM431946152.pdf
    • http://opac.kolejkrim.edu.my/repository/coin-master-free-spins-link-2021_GM406889139.pdf
    • http://opac.kolejkrim.edu.my/repository/gaming-dunia-coin-master-free-spins_GM406889139.pdf
    • http://opac.kolejkrim.edu.my/repository/free-robux-thumbnail_GM431946152.pdf
    • http://opac.kolejkrim.edu.my/repository/free-likes-for-tiktok_GM835599320.pdf
    • http://opac.kolejkrim.edu.my/repository/free-coins-coin-master-blog_GM406889139.pdf
    • http://opac.kolejkrim.edu.my/repository/game-hunters-coin-master-free-spins_GM406889139.pdf
    • http://opac.kolejkrim.edu.my/repository/roblox-toy-codes-free_GM431946152.pdf
    • http://opac.kolejkrim.edu.my/repository/free-robux-without-downloading-apps_GM431946152.pdf
    • http://opac.kolejkrim.edu.my/repository/bad-minecraft-free_GM479516143.pdf
    • http://opac.kolejkrim.edu.my/repository/how-to-get-free-spins-and-coins-on-coin-master_GM406889139.pdf
    • http://opac.kolejkrim.edu.my/repository/hacked-roblox-accounts-list_GM431946152.pdf
    • http://opac.kolejkrim.edu.my/repository/minecraft-112-hacked-client_GM479516143.pdf
    • http://opac.kolejkrim.edu.my/repository/coin-master-fan-page-free-spins_GM406889139.pdf
    • http://opac.kolejkrim.edu.my/repository/can-i-play-minecraft-for-free_GM479516143.pdf
    • http://opac.kolejkrim.edu.my/repository/free-robux-pins_GM431946152.pdf
    • http://opac.kolejkrim.edu.my/repository/simplysarc_GM479516143.pdf
    • http://opac.kolejkrim.edu.my/repository/free-roblox-accounts-2021-with-robux_GM431946152.pdf
    • http://opac.kolejkrim.edu.my/repository/coin-master-pro-hack_GM406889139.pdf
    • http://opac.kolejkrim.edu.my/repository/como-hackear-coin-master-espaol_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00004e44.bin
e588318389c86edb538886c5a54ff3ebf8f75daf01e041f8f898df45edd32ea3		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4E44 27432 bytes
font_01_sfnt_off00008c3f.bin
d5d380c14b1c3533a6c9fc17386668f4f695dbb5a72804d4b15c93cba3cce598		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8C3F 18700 bytes

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