Malicious PDF — malware analysis report

Static analysis result for SHA-256 b87888a501498b0f…

MALICIOUS

PDF

38.1 KB Created: 2021-05-20 12:46:20 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: de3c402ce5e675c79e0f751a7ce3466b SHA-1: bbbbea910a352cda65a9baf572082b390fb00fc4 SHA-256: b87888a501498b0fa8a0ad7799e0205b29ad4955a98659b47c8b475dac154a19
82 Risk Score

Malware Insights

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

The document's content and heuristics indicate a social engineering attempt. It displays a fake CAPTCHA and includes a call-to-action to download something, likely malicious. The embedded URLs point to resources related to game hacks, further supporting the lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9407

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/how-to-hack-to-get-robux-game-hack
    • http://w-i-r.de/images/roblox-admin-hack_GM431946152.pdf
    • http://w-i-r.de/images/minecraft-java-server-hosting-free_GM479516143.pdf
    • http://w-i-r.de/images/free-spins-coin-master-2021_GM406889139.pdf
    • http://w-i-r.de/images/coin-master-free-spins-2021_GM406889139.pdf
    • http://w-i-r.de/images/coin-master-instagram-free-spins_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off00003269.bin
19060d3f588cbebc52220ef473ab89b1f2034a2974cb0faa4d34dba48ba10ea9		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3269 28708 bytes
font_01_sfnt_off000072d2.bin
e2a97b64806b22db336191728b408e5b7179700d4ee5fd3b4b30addea2706a3c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x72D2 18516 bytes

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