Malicious PDF — malware analysis report

Static analysis result for SHA-256 4291e1af03081a6a…

MALICIOUS

PDF

42.9 KB Created: 2021-05-16 01:38:41 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: dc1f5cd62374eed6a5b62d9e37f29fa1 SHA-1: 1d0c16dcfea92c71dbd9d5d66bda7c3c313d1336 SHA-256: 4291e1af03081a6ab59266bb5ccadb85e135bef92e4efb634841426fc27d7db7
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a fake CAPTCHA lure, designed to trick users into interacting with the document. It also embeds external URLs, one of which is directly linked to a malicious ML classifier finding. The primary URL, https://netcdn.xyz/app/431946152/free-roblox-dominus-game-hack, likely serves as a download location for a secondary malicious payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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-roblox-dominus-game-hack
    • http://pdia.de/images/free-minecraft-shaders_GM479516143.pdf
    • http://pdia.de/images/roblox-hack-com_GM431946152.pdf
    • http://pdia.de/images/how-to-hack-roblox-accounts-for-robux_GM431946152.pdf
    • http://pdia.de/images/coin-master-gold-cards-free_GM406889139.pdf
    • http://pdia.de/images/coin-master-hack-to-get-free-spins_GM406889139.pdf
    • http://pdia.de/images/coin-master-daily-gifts_GM406889139.pdf
    • http://pdia.de/images/how-to-make-free-robux_GM431946152.pdf
    • http://pdia.de/images/robux-websites-2021_GM431946152.pdf
    • http://pdia.de/images/free-roblox-avatar-ideas_GM431946152.pdf
    • http://pdia.de/images/coin-master-hack-spins-free_GM406889139.pdf
    • http://pdia.de/images/free-spins-coin-master-2021-today_GM406889139.pdf
    • http://pdia.de/images/free-robux-only-username_GM431946152.pdf
    • http://pdia.de/images/coin-master-free-spins-no-verification_GM406889139.pdf
    • http://pdia.de/images/free-minecraft-java-edition-account_GM479516143.pdf
    • http://pdia.de/images/coin-master-free-spins-link-facebook-page_GM406889139.pdf
    • http://pdia.de/images/coin-master-free-spins-cheat_GM406889139.pdf
    • http://pdia.de/images/free-robux-codes-generator-no-verification_GM431946152.pdf
    • http://pdia.de/images/minecraft-classic-free_GM479516143.pdf
    • http://pdia.de/images/minecraft-for-laptop-free_GM479516143.pdf
    • http://pdia.de/images/how-to-get-free-robux-on-roblox_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off000046ec.bin
485c24ff4787b2f2d09363c3a3a81b0438649e5a64f72f055e46c79917534ccb		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x46EC 26276 bytes
font_01_sfnt_off0000847f.bin
2be0a1fc4ee774232c55e444dc6b2496869834729b438f6f5b1549b2be4e0f34		 pdf-font-stream PDF embedded font (sfnt) at offset 0x847F 18636 bytes

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