Malicious PDF — malware analysis report

Static analysis result for SHA-256 a6efb3d6ca1d7d39…

MALICIOUS

PDF

43.1 KB Created: 2021-06-08 23:36:40 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 162e37142477273578e098a7a2a490bf SHA-1: e13fd26469caf8812b0278f477475b0299f201ef SHA-256: a6efb3d6ca1d7d3915233214bb9c6da47457845feb0bc4934fd14b2feccae19f
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The document presents a fake CAPTCHA lure to trick users into interacting with malicious links, likely to download a second-stage payload. The embedded URLs point to external resources that are likely part of a phishing or exploit delivery chain. No scripts were extracted, but the presence of a fake CAPTCHA and external links strongly suggests a malicious intent to compromise the user.

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.tw/app/431946152/free-codes-for-robux-2021-game-hack
    • https://hundt-druck.de/wp-content/uploads/fsqm-files/roblox-free-exploit-that-can-run-obfuscated-script_GM431946152.pdf
    • https://hundt-druck.de/wp-content/uploads/fsqm-files/synapse-hack-download-roblox_GM431946152.pdf
    • https://hundt-druck.de/wp-content/uploads/fsqm-files/how-to-hack-a-roblox-account-2021_GM431946152.pdf
    • https://hundt-druck.de/wp-content/uploads/fsqm-files/how-to-make-free-roblox-clothes_GM431946152.pdf
    • https://hundt-druck.de/wp-content/uploads/fsqm-files/how-to-hack-robux-items-for-free_GM431946152.pdf
    • https://hundt-druck.de/wp-content/uploads/fsqm-files/roblox-hacking-lua-c-script_GM431946152.pdf
    • https://hundt-druck.de/wp-content/uploads/fsqm-files/roblox-free-draw-2-tutorial_GM431946152.pdf
    • https://hundt-druck.de/wp-content/uploads/fsqm-files/gas-station-simulator-hack-roblox_GM431946152.pdf
    • https://hundt-druck.de/wp-content/uploads/fsqm-files/roblox-hacking-class_GM431946152.pdf
    • https://hundt-druck.de/wp-content/uploads/fsqm-files/coin-master-hack-2021_GM406889139.pdf
    • https://hundt-druck.de/wp-content/uploads/fsqm-files/free-robux-website-hack_GM431946152.pdf
    • https://hundt-druck.de/wp-content/uploads/fsqm-files/free-robux-no-verification-no-survey_GM431946152.pdf
    • https://hundt-druck.de/wp-content/uploads/fsqm-files/free-minecraft-hacks_GM479516143.pdf
    • https://hundt-druck.de/wp-content/uploads/fsqm-files/free-roblox-gift-card-codes-2021-generator_GM431946152.pdf
    • https://hundt-druck.de/wp-content/uploads/fsqm-files/minecraft-xray-hack_GM479516143.pdf
    • https://hundt-druck.de/wp-content/uploads/fsqm-files/roblox-phantom-forces-hack_GM431946152.pdf
    • https://hundt-druck.de/wp-content/uploads/fsqm-files/hacks-para-roblox-descargar-2021_GM431946152.pdf
    • https://hundt-druck.de/wp-content/uploads/fsqm-files/how-do-you-get-free-robux-codes_GM431946152.pdf
    • https://hundt-druck.de/wp-content/uploads/fsqm-files/free-robux-websites-no-password_GM431946152.pdf
    • https://hundt-druck.de/wp-content/uploads/fsqm-files/how-to-get-free-admin-on-any-roblox-game_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004da8.bin
b7432069eaa5bec0c40649fe2d08098fe07b28ab2fd613630bd8db884089303e
pdf-font-stream PDF embedded font (sfnt) at offset 0x4DA8 24156 bytes
font_01_sfnt_off000084db.bin
fcdce29a6bbbe895a218fee7f2081d551fcb59ad9449753d2f6d3bc635206352
pdf-font-stream PDF embedded font (sfnt) at offset 0x84DB 18588 bytes