Malicious PDF — malware analysis report

Static analysis result for SHA-256 4927dbe3a63bb51e…

MALICIOUS

PDF

33.3 KB Created: 2021-06-28 21:38:44 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 75fb0f3c04afc4a344f4e232b45b6f91 SHA-1: 527a3aaf75a0a52a1e5b84ba4a56bd1306f7d59b SHA-256: 4927dbe3a63bb51ea103347a990e732314177f0227d56a687f56f068940ed2d9
82 Risk Score

Malware Insights

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

The PDF document displays a fake CAPTCHA or human verification prompt, a common tactic to trick users into interacting with malicious content. It contains an embedded URI pointing to a suspicious URL, likely intended to deliver a second-stage payload. The ML classifier also flagged this PDF as malicious with high confidence.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9824

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-play-for-free-online-no-download-game-hack PDF link annotation
    • http://pustaka.fhuk.unand.ac.id/repository/is-it-possible-to-get-banned-for-cheating-roblox_GM431946152.pdfIn PDF document text
    • http://pustaka.fhuk.unand.ac.id/repository/free-spin-coin-master-game_GM406889139.pdfIn PDF document text
    • http://pustaka.fhuk.unand.ac.id/repository/get-free-roblox_GM431946152.pdfIn PDF document text
    • http://pustaka.fhuk.unand.ac.id/repository/redboy-free-robux_GM431946152.pdfIn PDF document text
    • http://pustaka.fhuk.unand.ac.id/repository/how-to-get-free-roblox-money_GM431946152.pdfIn PDF document text
    • http://pustaka.fhuk.unand.ac.id/repository/how-to-hack-robux-2021-pc_GM431946152.pdfIn PDF document text
    • http://pustaka.fhuk.unand.ac.id/repository/free-roblox-gift-card-codes-2021-unused_GM431946152.pdfIn PDF document text
    • http://pustaka.fhuk.unand.ac.id/repository/roblox-money-hack-2021-free-download_GM431946152.pdfIn PDF document text
    • http://pustaka.fhuk.unand.ac.id/repository/free-school-games-roblox_GM431946152.pdfIn PDF document text
    • http://pustaka.fhuk.unand.ac.id/repository/free-robux-no-human-verification-required_GM431946152.pdfIn PDF document text
    • http://pustaka.fhuk.unand.ac.id/repository/www-rbxmaniac-com-free-robux_GM431946152.pdfIn PDF document text
    • http://pustaka.fhuk.unand.ac.id/repository/how-to-hack-in-roblox-in-3-step_GM431946152.pdfIn PDF document text
    • http://pustaka.fhuk.unand.ac.id/repository/best-free-minecraft-servers_GM479516143.pdfIn PDF document text
    • http://pustaka.fhuk.unand.ac.id/repository/cerberus-hack-roblox_GM431946152.pdfIn PDF document text
    • http://pustaka.fhuk.unand.ac.id/repository/furious-crafter-roblox-hack_GM431946152.pdfIn PDF document text
    • http://pustaka.fhuk.unand.ac.id/repository/free-games-like-roblox-for-chromebook_GM431946152.pdfIn PDF document text
    • http://pustaka.fhuk.unand.ac.id/repository/how-to-cheat-in-roblox-booga-booga_GM431946152.pdfIn PDF document text
    • http://pustaka.fhuk.unand.ac.id/repository/critical-strike-roblox-hack_GM431946152.pdfIn PDF document text
    • http://pustaka.fhuk.unand.ac.id/repository/roblox-nation-com-hack_GM431946152.pdfIn PDF document text
    • http://pustaka.fhuk.unand.ac.id/repository/free-robux-generator-no-human-verification-or-surveys_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 7

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002b19.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2B19 22004 bytes
SHA-256: 377d8e819ecbd096134859ec9b1b7a5509e9f93d294df291f7aab81f2a35dd73
font_01_sfnt_off00005bd0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5BD0 19612 bytes
SHA-256: 4a8057754019ef59d951f6baa7a5c22d0e3f76b781231bc6147fac0e6785a173

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