Malicious PDF — malware analysis report

Static analysis result for SHA-256 87822f4f9071127e…

MALICIOUS

PDF

47.5 KB Created: 2021-06-13 20:14:10 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 0664832a1baaefc091339d5836a0c981 SHA-1: e1ac64464eaf4fc966a3706b375a8619578f18a6 SHA-256: 87822f4f9071127ebd0feaf7b4d4abba2e7e6337eb4e55ab8cf91480323bfa2e
82 Risk Score

Malware Insights

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

The PDF document contains a fake CAPTCHA lure, aiming to trick users into downloading further content. It also includes numerous embedded URLs, one of which, http://netcdn.co/app/431946152/all-the-codes-not-used-free-robux-game-hack, is directly associated with the fake CAPTCHA heuristic. The document body and extracted URLs suggest a theme of "free Robux" or game hacks, a common lure for malicious downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9013

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/all-the-codes-not-used-free-robux-game-hack
    • http://repository.ummy.ac.id//repository/minecraft-hack-mod_GM479516143.pdf
    • http://repository.ummy.ac.id//repository/free-spin-coin-master-hack-2021_GM406889139.pdf
    • http://repository.ummy.ac.id/repository/free-roblox-gift-card-codes-generator-2021-may_GM431946152.pdf
    • http://repository.ummy.ac.id//repository/how-do-you-get-free-robux-on-roblox_GM431946152.pdf
    • http://repository.ummy.ac.id/repository/coin-master-free-spins-link-blogspot-2021_GM406889139.pdf
    • http://repository.ummy.ac.id//repository/master-hack-coin_GM406889139.pdf
    • http://repository.ummy.ac.id/repository/free-robux-without-human-verification-or-survey-or-download_GM431946152.pdf
    • http://repository.ummy.ac.id//repository/easy-points-gg_GM431946152.pdf
    • http://repository.ummy.ac.id//repository/free-spin-link_GM406889139.pdf
    • http://repository.ummy.ac.id//repository/coin-master-hack-spin-link_GM406889139.pdf
    • http://repository.ummy.ac.id/repository/robux-hack-tool-download-2021_GM431946152.pdf
    • http://repository.ummy.ac.id/repository/how-you-get-free-robux-in-roblox_GM431946152.pdf
    • http://repository.ummy.ac.id//repository/free-minecraft-generator_GM479516143.pdf
    • http://repository.ummy.ac.id/repository/robuxian-hack-to-steal-robux_GM431946152.pdf
    • http://repository.ummy.ac.id/repository/new-figer-hack-pastebin-roblox_GM431946152.pdf
    • http://repository.ummy.ac.id//repository/60-free-spins-coin-master_GM406889139.pdf
    • http://repository.ummy.ac.id//repository/can-i-get-free-robux_GM431946152.pdf
    • http://repository.ummy.ac.id//repository/hack-to-get-free-spins-on-coin-master_GM406889139.pdf
    • http://repository.ummy.ac.id//repository/rbx-free-robux_GM431946152.pdf
    • http://repository.ummy.ac.id//repository/how-to-hack-roblox-accounts-2021-easy_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004d0b.bin
434983b82636d6ac7c15467e754bd5d9fde0a5a468a719075c5d19ec0e1473fc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4D0B 26832 bytes
font_01_sfnt_off00008a32.bin
e49a868379cd3c37e631c5a53c010e21f38d803532a2b8417aee82315d4e8634		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8A32 3500 bytes
font_02_sfnt_off000095d4.bin
04b0658f58ede808a768a362143b23566666ea86dab5741af6c241353b047d10		 pdf-font-stream PDF embedded font (sfnt) at offset 0x95D4 18720 bytes

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