Malicious PDF — malware analysis report

Static analysis result for SHA-256 b85eb9fcb8028e1a…

MALICIOUS

PDF

44.8 KB Created: 2021-06-13 19:12:52 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 278fe8f9353c5a3753711b88fa609233 SHA-1: e3784e03f4e3c0fa46adc9aee12ea0d8286dfdde SHA-256: b85eb9fcb8028e1aecedd16c67454dd6ce405a591b71a28e96ac68cffcea1730
82 Risk Score

Malware Insights

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

The PDF document contains a fake CAPTCHA lure, designed to trick users into interacting with malicious links. The primary URL, http://netcdn.co/app/431946152/roblox-promocodes-hack-robux-game-hack, is embedded within the document and likely serves as a download source for further malicious content. The document's content and embedded links suggest a social engineering attempt to distribute malware disguised as game cheats or hacks.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 http://netcdn.co/app/431946152/roblox-promocodes-hack-robux-game-hack
    • https://registracomodo.it/wp-content/uploads/fsqm-files/hack-tiktok-fans-free_GM835599320.pdf
    • https://registracomodo.it/wp-content/uploads/fsqm-files/roblox-teleport-hack-jailbreak_GM431946152.pdf
    • https://registracomodo.it/wp-content/uploads/fsqm-files/master-coin-free-spin_GM406889139.pdf
    • https://registracomodo.it/wp-content/uploads/fsqm-files/how-to-get-1-robux-for-free_GM431946152.pdf
    • https://registracomodo.it/wp-content/uploads/fsqm-files/roblox-hack-get-unlimited-robux-for-free_GM431946152.pdf
    • https://registracomodo.it/wp-content/uploads/fsqm-files/cheats-for-bird-simulator-roblox_GM431946152.pdf
    • https://registracomodo.it/wp-content/uploads/fsqm-files/how-to-make-a-free-robux-generator_GM431946152.pdf
    • https://registracomodo.it/wp-content/uploads/fsqm-files/hack-de-roblox-robux-gratis-2021_GM431946152.pdf
    • https://registracomodo.it/wp-content/uploads/fsqm-files/objet-roblox-library-free_GM431946152.pdf
    • https://registracomodo.it/wp-content/uploads/fsqm-files/how-to-hack-roblox-games_GM431946152.pdf
    • https://registracomodo.it/wp-content/uploads/fsqm-files/how-to-hack-people-on-roblox_GM431946152.pdf
    • https://registracomodo.it/wp-content/uploads/fsqm-files/free-school-games-roblox_GM431946152.pdf
    • https://registracomodo.it/wp-content/uploads/fsqm-files/roblox-free-accessories-2021_GM431946152.pdf
    • https://registracomodo.it/wp-content/uploads/fsqm-files/get-free-robux-today-com_GM431946152.pdf
    • https://registracomodo.it/wp-content/uploads/fsqm-files/free-robux-websites-that-actually-work_GM431946152.pdf
    • https://registracomodo.it/wp-content/uploads/fsqm-files/free-robux-games_GM431946152.pdf
    • https://registracomodo.it/wp-content/uploads/fsqm-files/best-free-level-7-full-script-executor-for-roblox_GM431946152.pdf
    • https://registracomodo.it/wp-content/uploads/fsqm-files/free-robux-apk-without-buying-it-roblox_GM431946152.pdf
    • https://registracomodo.it/wp-content/uploads/fsqm-files/roblox-bots-free-game_GM431946152.pdf
    • https://registracomodo.it/wp-content/uploads/fsqm-files/roblox-free-boy-hair-not-model_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004b76.bin
bf0968cd630d4d8252d395bd9a52ff5345380003b037e3a1f03a678c98ca63fd
decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4B76 27796 bytes
font_01_sfnt_off00008aeb.bin
52a340eb6f3c59606c2c8a3db09cd9fccf74fef11c0d014d455f2413ef9ae678
pdf-font-stream PDF embedded font (sfnt) at offset 0x8AEB 18912 bytes