Malicious PDF — malware analysis report

Static analysis result for SHA-256 bf1563ecfbe61795…

MALICIOUS

PDF

36.5 KB Created: 2021-05-23 22:16:55 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 18bec46bef78d602435a3ed30d8313ad SHA-1: a584999ce5492c2434759dc9946987d80a3c168f SHA-256: bf1563ecfbe617952c3dc48255d1516ded0b17bfd87b7de5ea1dba5a5066d722
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 to trick users into clicking a link. This link, 'https://netcdn.xyz/app/835599320/get-free-tiktok-followers-game-hack', is likely intended to lead to a malicious website or download a secondary payload. The presence of multiple suspicious URLs and the ML classifier's high confidence score support this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9492

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/835599320/get-free-tiktok-followers-game-hack
    • http://feuerwehr-rheinau.de/images/roblox-assassin_GM431946152.pdf
    • http://feuerwehr-rheinau.de/images/free-robux-generator-without-human-verification_GM431946152.pdf
    • http://feuerwehr-rheinau.de/images/coin-master-spins-hack-2021_GM406889139.pdf
    • http://feuerwehr-rheinau.de/images/roblox-hack-codes_GM431946152.pdf
    • http://feuerwehr-rheinau.de/images/how-to-hack-roblox-accounts-for-robux_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000335c.bin
40a7078b8510b93365e2d1513b23e8dd77dc6a4cc160161d91755ec703421d99		 pdf-font-stream PDF embedded font (sfnt) at offset 0x335C 26400 bytes
font_01_sfnt_off00006f2f.bin
02c3cedea4a2807b323b614e41e6797ad921ddb65350057b59541dca36dbbb9a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6F2F 17692 bytes

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