Malicious PDF — malware analysis report

Static analysis result for SHA-256 e27c684810b6645c…

MALICIOUS

PDF

34.9 KB Created: 2021-07-05 16:21:53 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: f74935213178e13ffa9b46acae6d4921 SHA-1: e38fe7a4f1110cc5f22b415a9c388d1bca87e137 SHA-256: e27c684810b6645c7327b8d4bcc7a8e0c252921d503a69064558444a764e7823
82 Risk Score

Malware Insights

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

The document displays a fake CAPTCHA lure to trick users into clicking embedded links, which is a common social engineering tactic. The ML classifier strongly indicates maliciousness, and the presence of multiple URLs suggests a downloader or redirector. No scripts were extracted, but the PDF structure and embedded links point towards a malicious workflow.

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.tw/app/431946152/robuxmatchcom-free-robux-game-hack
    • http://elibraryfk.unjani.ac.id/elibrary/repository/roblox-avatar-free-hair_GM431946152.pdf
    • http://elibraryfk.unjani.ac.id/elibrary/repository/coin-master-hack-online-android_GM406889139.pdf
    • http://elibraryfk.unjani.ac.id/elibrary/repository/hacks-to-get-free-robux_GM431946152.pdf
    • http://elibraryfk.unjani.ac.id/fkrepository/repository/pubg-uc-zam_GM1330123889.pdf
    • http://elibraryfk.unjani.ac.id/elibrary/repository/how-to-noclip-in-roblox-cheat-engine-64_GM431946152.pdf
    • http://elibraryfk.unjani.ac.id/elibrary/repository/heroes-online-roblox_GM431946152.pdf
    • http://elibraryfk.unjani.ac.id/fkrepository/repository/outil-script-mad-city-roblox-hack_GM431946152.pdf
    • http://elibraryfk.unjani.ac.id/elibrary/repository/roblox-best-free-mod-menu_GM431946152.pdf
    • http://elibraryfk.unjani.ac.id/elibrary/repository/roblox-cheat-engine-codes_GM431946152.pdf
    • http://elibraryfk.unjani.ac.id/fkrepository/repository/coin-master-free-cards-2021_GM406889139.pdf
    • http://elibraryfk.unjani.ac.id/fkrepository/repository/microsoft-roblox_GM431946152.pdf
    • http://elibraryfk.unjani.ac.id/elibrary/repository/how-to-hack-any-roblox-account_GM431946152.pdf
    • http://elibraryfk.unjani.ac.id/fkrepository/repository/how-to-get-free-roblox-gift-cards_GM431946152.pdf
    • http://elibraryfk.unjani.ac.id/elibrary/repository/free-roblox-followers_GM431946152.pdf
    • http://elibraryfk.unjani.ac.id/elibrary/repository/murder-mystery-free-online-games-roblox_GM431946152.pdf
    • http://elibraryfk.unjani.ac.id/elibrary/repository/roblox-booga-booga-hack-mojo-update_GM431946152.pdf
    • http://elibraryfk.unjani.ac.id/fkrepository/repository/se-puede-hackear-coin-master_GM406889139.pdf
    • http://elibraryfk.unjani.ac.id/fkrepository/repository/roblox-bloxburg-hack_GM431946152.pdf
    • http://elibraryfk.unjani.ac.id/fkrepository/repository/master-coin-free-spin-daily_GM406889139.pdf
    • http://elibraryfk.unjani.ac.id/elibrary/repository/free-robux-generator-no-survey_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000031dc.bin
3be785a86ed072c298b09f2f25197e89222fd71b66f827162a1f240ba8950151		 pdf-font-stream PDF embedded font (sfnt) at offset 0x31DC 22016 bytes
font_01_sfnt_off000062d5.bin
cff0d4d21023d1d0af59a0abdc5d0297996ab287ec72876132611e0e39db5cae		 pdf-font-stream PDF embedded font (sfnt) at offset 0x62D5 19244 bytes

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