Malicious PDF — malware analysis report

Static analysis result for SHA-256 3d20ce8a8be082d9…

MALICIOUS

PDF

42.4 KB Created: 2021-06-13 23:04:30 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: cbea949fc94ccbe8f9098926b6cd8aaf SHA-1: dd3b5877f8d1c8c3e0dc40ecc5e2aea6c42fd106 SHA-256: 3d20ce8a8be082d98d06d262c6e8029198d5107076bc7168909b3e21a472401a
82 Risk Score

Malware Insights

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

The sample is a PDF document that displays a fake CAPTCHA or human verification prompt to trick users into clicking malicious links. The document body and embedded URLs suggest a lure related to obtaining free virtual currency or game cheats. The primary malicious URL identified is http://netcdn.co/app/431946152/free-robux-no-verification-no-download-game-hack, which likely serves as a download or further redirection point.

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 http://netcdn.co/app/431946152/free-robux-no-verification-no-download-game-hack
    • https://e-learningmin10jakarta.com/__statics/gudangsoal/files/coin-master-hack-online-cheat_GM406889139.pdf
    • https://e-learningmin10jakarta.com/__statics/gudangsoal/files/coin-master-hack-with-facebook-login_GM406889139.pdf
    • https://e-learningmin10jakarta.com/__statics/gudangsoal/files/coin-master-daily-free-spins-and-coins_GM406889139.pdf
    • https://e-learningmin10jakarta.com/__statics/gudangsoal/files/robux-online_GM431946152.pdf
    • https://e-learningmin10jakarta.com/__statics/gudangsoal/files/roblox-money-hack-free-download_GM431946152.pdf
    • https://www.e-learningmin10jakarta.com/__statics/gudangsoal/files/free-robux-legit_GM431946152.pdf
    • https://www.e-learningmin10jakarta.com/__statics/gudangsoal/files/coin-master-online-hack-download_GM406889139.pdf
    • https://e-learningmin10jakarta.com/__statics/gudangsoal/files/coin-master-free-coins-and-spins-2021_GM406889139.pdf
    • https://www.e-learningmin10jakarta.com/__statics/gudangsoal/files/free-spins-for-coin-master-2021_GM406889139.pdf
    • https://e-learningmin10jakarta.com/__statics/gudangsoal/files/how-to-get-minecraft-for-free-on-pc_GM479516143.pdf
    • https://www.e-learningmin10jakarta.com/__statics/gudangsoal/files/robux-hack-no-human-verification-2021-pc_GM431946152.pdf
    • https://www.e-learningmin10jakarta.com/__statics/gudangsoal/files/coin-master-free-cards-link_GM406889139.pdf
    • https://www.e-learningmin10jakarta.com/__statics/gudangsoal/files/hack-money-pizzeria-roleplay-remastered-roblox_GM431946152.pdf
    • https://www.e-learningmin10jakarta.com/__statics/gudangsoal/files/freerobuxhack-us-2021_GM431946152.pdf
    • https://e-learningmin10jakarta.com/__statics/gudangsoal/files/free-robux-gift-card_GM431946152.pdf
    • https://www.e-learningmin10jakarta.com/__statics/gudangsoal/files/book-wings-roblox-free_GM431946152.pdf
    • https://www.e-learningmin10jakarta.com/__statics/gudangsoal/files/blox-fish-free-robux_GM431946152.pdf
    • https://e-learningmin10jakarta.com/__statics/gudangsoal/files/free-private-server-roblox_GM431946152.pdf
    • https://www.e-learningmin10jakarta.com/__statics/gudangsoal/files/how-to-get-free-robux-for-kids_GM431946152.pdf
    • https://www.e-learningmin10jakarta.com/__statics/gudangsoal/files/get-free-robux-com_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off000048fc.bin
0de8521ee1e8dcbd7f679770ebf43c498a4460f4605a686997567a379a8ec506		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x48FC 24348 bytes
font_01_sfnt_off00008060.bin
529ad809d39cb86513f1fd0a7c59ac13158e8644a31ce1f1c8620f9d5ad40971		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8060 19180 bytes

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