Malicious PDF — malware analysis report

Static analysis result for SHA-256 baa2b96b886038f0…

MALICIOUS

PDF

38.0 KB Created: 2021-05-20 23:52:47 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 9319d19a2f874e6849a3c62ee681fb3a SHA-1: 5c7a42084bc20bda42fbc7d8191db1f98924618c SHA-256: baa2b96b886038f0aee24825d3a1ac9e68355be72c36c361c2b80b1fdbc58d85
182 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious File Execution: User Execution

The PDF document contains a fake CAPTCHA and explicit instructions to paste or run a command, which is a common lure for executing malicious payloads. The document body and embedded URLs promote a 'Roblox hack', indicating a social engineering attack aimed at tricking users into downloading and executing malware. The presence of multiple URLs associated with game hacks further supports this conclusion.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7010

Heuristics 6

  • Fake CAPTCHA with command-running instructions critical SE_FAKE_CAPTCHA_CLICKFIX
    Document combines fake CAPTCHA or human-verification language with instructions to paste or run a command — a high-confidence ClickFix pattern
  • Clipboard command execution lure high SE_CLIPBOARD_COMMAND_LURE
    Document tells the user to copy or paste clipboard content into Run, PowerShell, cmd, or another shell-like execution context
  • 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/get-free-roblox-game-hack
    • http://muko-unterfranken.info/images/roblox-hack-client_GM431946152.pdf
    • http://muko-unterfranken.info/images/coin-master-facebook-hack_GM406889139.pdf
    • http://muko-unterfranken.info/images/free-coins-and-spins-for-coin-master_GM406889139.pdf
    • http://muko-unterfranken.info/images/coin-master-exchange-40-free-spins_GM406889139.pdf
    • http://muko-unterfranken.info/images/25-free-spins-coin-master_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off0000313d.bin
23c2ac204e590a96e5b79f10bc70956f27a9f371f2e98e615dc7e585e5b7bc3b		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x313D 24560 bytes
font_01_sfnt_off000069e5.bin
77ae1c4cffa647a8fd533dfa4102e94364989f9e80b9cd131876e9d1005899a2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x69E5 2832 bytes
font_02_sfnt_off00007395.bin
3163a373a79a6ba2b402f3bc3abf4e04b0a5713e8f73e060e65042d4a11df7ac		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7395 18052 bytes

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