Malicious PDF — malware analysis report

Static analysis result for SHA-256 c6fa3c22b8335750…

MALICIOUS

PDF

37.1 KB Created: 2021-05-21 07:11:48 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 6bfa1e96a10c21721462422c638915e2 SHA-1: b765021e888e64bbe2e3e8db4c7be072ccc97fe3 SHA-256: c6fa3c22b83357509d50030c16dce0b5e79017e8e558237197ead0e7e6d63cef
82 Risk Score

Malware Insights

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

The PDF document contains a fake CAPTCHA lure to trick users into clicking a malicious link. The link leads to a page promising 'free Robux' and appears to be part of a scam. The document also contains multiple embedded URLs pointing to similar scam pages.

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/free-robux-youtube-game-hack
    • http://www.mucinvitinh.vn/public/images/image_uploads/files/is-there-a-way-to-get-free-robux_GM431946152.pdf
    • http://www.mucinvitinh.vn/public/images/image_uploads/files/coin-master-free-spins-and-coins-without-human-verification_GM406889139.pdf
    • http://www.mucinvitinh.vn/public/images/image_uploads/files/roblox-hack-me_GM431946152.pdf
    • http://www.mucinvitinh.vn/public/images/image_uploads/files/coin-master-free-spins-2021_GM406889139.pdf
    • http://www.mucinvitinh.vn/public/images/image_uploads/files/coin-master-hack-apk-android-1_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off000032a4.bin
8a38b45253cd5361f9161fc16815278e53a23a7c323a9be227523a9fb53c8e8a		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x32A4 27168 bytes
font_01_sfnt_off00006f97.bin
de5b074060e7ee0fa0230ac6212805924cd4a5679e09505111534b28358c176b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6F97 18280 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.