Malicious PDF — malware analysis report

Static analysis result for SHA-256 85a48b6188e3d50d…

MALICIOUS

PDF

47.3 KB Created: 2021-06-01 19:39:56 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: ade9375272e9835ff8e888104f3e0e51 SHA-1: bacd6ba81fb18f5588ccf052d7fe17e41b11a0a8 SHA-256: 85a48b6188e3d50dd1902b37c2eec5ef15a58308e7daf219f35b1a0f1e1b90c6
82 Risk Score

Malware Insights

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

The PDF document contains a fake CAPTCHA and a download lure, directing users to external URLs for 'free codes' or 'hacks'. The ML classifier strongly flagged this PDF as malicious. The embedded URLs likely lead to further stages of infection or phishing content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9832

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.xyz/app/431946152/free-codes-for-boku-no-roblox-game-hack
    • https://hundt-druck.de/wp-content/uploads/fsqm-files/free-robux-hack-no-confusion_GM431946152.pdf
    • https://hundt-druck.de/wp-content/uploads/fsqm-files/f3x-hack-roblox_GM431946152.pdf
    • https://hundt-druck.de/wp-content/uploads/fsqm-files/free-codes-for-roblox-to-get-robux_GM431946152.pdf
    • https://hundt-druck.de/wp-content/uploads/fsqm-files/hack-tiktok-fans-free_GM835599320.pdf
    • https://hundt-druck.de/wp-content/uploads/fsqm-files/how-to-get-free-robux-live-stream_GM431946152.pdf
    • https://hundt-druck.de/wp-content/uploads/fsqm-files/roblox-free-costumes_GM431946152.pdf
    • https://hundt-druck.de/wp-content/uploads/fsqm-files/minecraft-free-trial_GM479516143.pdf
    • https://hundt-druck.de/wp-content/uploads/fsqm-files/roblox-hack-no-verification-or-survey_GM431946152.pdf
    • https://hundt-druck.de/wp-content/uploads/fsqm-files/dms-cheats-roblox_GM431946152.pdf
    • https://hundt-druck.de/wp-content/uploads/fsqm-files/free-spins-for-coin-master-app_GM406889139.pdf
    • https://hundt-druck.de/wp-content/uploads/fsqm-files/daily-free-spins-for-coin-master_GM406889139.pdf
    • https://hundt-druck.de/wp-content/uploads/fsqm-files/roblox-free-gears-hat-faces-clothes-2_GM431946152.pdf
    • https://hundt-druck.de/wp-content/uploads/fsqm-files/free-robux-without-doing-anything_GM431946152.pdf
    • https://hundt-druck.de/wp-content/uploads/fsqm-files/coin-master-daily-free-spins_GM406889139.pdf
    • https://hundt-druck.de/wp-content/uploads/fsqm-files/roblox-island-royale-aimbot-hack_GM431946152.pdf
    • https://hundt-druck.de/wp-content/uploads/fsqm-files/free-robux-extensions_GM431946152.pdf
    • https://hundt-druck.de/wp-content/uploads/fsqm-files/free-views-tiktok_GM835599320.pdf
    • https://hundt-druck.de/wp-content/uploads/fsqm-files/how-to-get-free-robux-without-verifying-2021_GM431946152.pdf
    • https://hundt-druck.de/wp-content/uploads/fsqm-files/free-robux-site_GM431946152.pdf
    • https://hundt-druck.de/wp-content/uploads/fsqm-files/coin-master-free-cards_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off0000543a.bin
929ac09ca447e4eb9d17f17dd2218e20f0d0a87846d0fd99ed74a0e4817c622f
decompressed-pdf-stream PDF FlateDecoded stream at offset 0x543A 27840 bytes
font_01_sfnt_off00009620.bin
8a7e9e175336e2de642edcb551481b7f481225d8df01fa0b30e763ceec268d2d
pdf-font-stream PDF embedded font (sfnt) at offset 0x9620 18432 bytes