Malicious PDF — malware analysis report

Static analysis result for SHA-256 30092cb9aec969db…

MALICIOUS

PDF

41.0 KB Created: 2021-05-21 01:21:31 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 7cd3526e9b72ea5e44991fe6124720f4 SHA-1: 6f0bed2159d18f5ebd81d8276bcbfdd768e1f39a SHA-256: 30092cb9aec969dbfdfceb671a138beb4c8bae24835de226778e3fe64e098ddd
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document contains a fake CAPTCHA lure, instructing the user to click a link to access a 'Roblox Free Pets' generator. This link, 'https://netcdn.xyz/app/431946152/roblox-free-pets-game-hack', likely leads to a malicious website. The document also embeds multiple URLs pointing to similar game-related lures, suggesting a phishing or malware distribution campaign. No scripts were extracted, but the presence of external URIs and the fake CAPTCHA heuristic strongly indicate a social engineering attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7499

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/roblox-free-pets-game-hack
    • http://bestmaids.co.uk/images/roblox-zone-free-robux_GM431946152.pdf
    • http://bestmaids.co.uk/images/coin-master-spin-ml-link_GM406889139.pdf
    • http://bestmaids.co.uk/images/coin-master-free-coins-link-march-2021_GM406889139.pdf
    • http://bestmaids.co.uk/images/free-robux-no-generator_GM431946152.pdf
    • http://bestmaids.co.uk/images/roblox-hacking-website_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off00003478.bin
ff50dc769fa026d5ca5c6b1c793f704737d68f3ad4b65b96464a2e3d4547d4ff		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3478 28388 bytes
font_01_sfnt_off0000757b.bin
77ae1c4cffa647a8fd533dfa4102e94364989f9e80b9cd131876e9d1005899a2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x757B 2832 bytes
font_02_sfnt_off00007f2c.bin
e6dab3842af37aa13062c3ed88bc226f2e60d4bb47f1ab25515567cf82d0f81e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7F2C 18204 bytes

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