Malicious PDF — malware analysis report

Static analysis result for SHA-256 c42e85eb8d4500a8…

MALICIOUS

PDF

37.7 KB Created: 2021-05-21 00:44:37 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 0c0bde12bf43d62398fb6491a795b3bf SHA-1: e1b6e6f85320e76e080017b9dcb1d2214fa33873 SHA-256: c42e85eb8d4500a8556c9291876720685374d2f0f6746e73295e640b674e5c0f
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF document displays a fake CAPTCHA and a call-to-action to trick users into clicking a link for free Robux. The embedded URL and document body text explicitly mention 'robux-free-gift-card-org-hack' and 'CLICK HERE TO ACCESS ROBLOX GENERATOR', strongly suggesting a phishing or scam attempt. The document also contains multiple URLs pointing to potentially malicious PDF files hosted on dygmotors.com.py.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9447

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/robux-free-gift-card-org-hack-game-hack
    • http://dygmotors.com.py/images/roblox-hack-apk_GM431946152.pdf
    • http://dygmotors.com.py/images/you-promised-my-son-free-robux_GM431946152.pdf
    • http://dygmotors.com.py/images/coin-master-free-download_GM406889139.pdf
    • http://dygmotors.com.py/images/free-robux-obby_GM431946152.pdf
    • http://dygmotors.com.py/images/how-to-get-minecraft-for-free-on-ps4_GM479516143.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off0000329b.bin
a22b731b514961eacaeb13e14238c0a0fc6662f60eb77a526daac4a7379af5b0		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x329B 26436 bytes
font_01_sfnt_off00006f86.bin
bb2bfd1b5c80cb1744cd57562806e4410c1e72fb9e1ed3dff7cfd9b3dcead9ac		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6F86 19096 bytes

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