Malicious PDF — malware analysis report

Static analysis result for SHA-256 030f6c1d9f1ed11c…

MALICIOUS

PDF

44.1 KB Created: 2021-06-07 10:38:27 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: a9f7de14fb6f07cc26827d1da1985ff6 SHA-1: d7d7e9b521bdedb2a4079fb53616fb931daa6e0d SHA-256: 030f6c1d9f1ed11c6ac7877adcc2c9d06838aa31de2bb606950fb29066269900
82 Risk Score

Malware Insights

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

The document presents a fake CAPTCHA to trick the user into interacting with it, a common social engineering tactic. It contains an embedded URI pointing to a URL that promises hacks for popular games, suggesting a lure for potentially malicious content. While no scripts were directly extracted, the presence of a fake CAPTCHA and external links strongly indicates an attempt to lead the user to download or execute a secondary payload.

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/how-tzo-hack-robux-links-game-hack
    • http://properteez.com/images/free-spins-coins-coin-master_GM406889139.pdf
    • http://properteez.com/images/how-to-get-minecraft-for-free-on-xbox-one_GM479516143.pdf
    • http://properteez.com/images/free-spin-link-for-coin-master-game_GM406889139.pdf
    • http://properteez.com/images/free-spin-today-coin-master_GM406889139.pdf
    • http://properteez.com/images/free-roblox-adopt-me-pets_GM431946152.pdf
    • http://properteez.com/images/robux-win_GM431946152.pdf
    • http://properteez.com/images/roblox-free-roblox_GM431946152.pdf
    • http://properteez.com/images/free-old-roblox-accounts_GM431946152.pdf
    • http://properteez.com/images/free-mojang-account-with-minecraft_GM479516143.pdf
    • http://properteez.com/images/free-robux-app-2021_GM431946152.pdf
    • http://properteez.com/images/how-to-hack-people-on-roblox_GM431946152.pdf
    • http://properteez.com/images/free-roblox-hack_GM431946152.pdf
    • http://properteez.com/images/robloxmatchcom-free-robux_GM431946152.pdf
    • http://properteez.com/images/coin-master-free-spin-and-coins-links_GM406889139.pdf
    • http://properteez.com/images/free-roblox-high-school-game_GM431946152.pdf
    • http://properteez.com/images/to-get-free-robux_GM431946152.pdf
    • http://properteez.com/images/how-to-get-free-robux-for-kids_GM431946152.pdf
    • http://properteez.com/images/robux-free-c_GM431946152.pdf
    • http://properteez.com/images/how-to-get-free-robux-games_GM431946152.pdf
    • http://properteez.com/images/free-coin-master-spins-2021_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004de3.bin
56943f4b8b911684774ebc445c902077fc0ce40a4361caa046f8fb1f42f69389		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4DE3 25748 bytes
font_01_sfnt_off000088ab.bin
f689158190f6e5f2cb5ff24c83a919cf8507b6f24bd928b536944bc84254a5b0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x88AB 18612 bytes

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