Malicious PDF — malware analysis report

Static analysis result for SHA-256 edd7bc05f9ab8da3…

MALICIOUS

PDF

45.9 KB Created: 2021-05-12 04:40:59 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 1489463cb39049264f2049fe8bda603b SHA-1: b9fd7c8dabcef76ced510f1af4fc53af5795607f SHA-256: edd7bc05f9ab8da3b9ededabf82548d384dc119722a7cd064aa846926bd648b6
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The document presents a fake CAPTCHA to trick users into interacting with malicious links, a common social engineering tactic. The presence of external URIs and the ML classifier's high confidence score indicate malicious intent. While no scripts were directly extracted, the PDF structure and embedded URIs suggest it's designed to lead the user to a malicious download or exploit. The document body's content about hacking Roblox further supports a lure-based attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9432

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-roblox-passwords-game-hack
    • http://balibetonmandiri.com/new/public/ckfinder/userfiles/files/coin-master-free-cards_GM406889139.pdf
    • http://balibetonmandiri.com/new/public/ckfinder/userfiles/files/free-roblox-accounts-with-robux_GM431946152.pdf
    • http://balibetonmandiri.com/new/public/ckfinder/userfiles/files/coin-master-free-spins-save_GM406889139.pdf
    • http://balibetonmandiri.com/new/public/ckfinder/userfiles/files/how-to-hack-minecraft_GM479516143.pdf
    • http://balibetonmandiri.com/new/public/ckfinder/userfiles/files/coin-master-hack-to-get-free-spins_GM406889139.pdf
    • http://balibetonmandiri.com/new/public/ckfinder/userfiles/files/free-robux-glitch_GM431946152.pdf
    • http://balibetonmandiri.com/new/public/ckfinder/userfiles/files/how-to-sue-roblox_GM431946152.pdf
    • http://balibetonmandiri.com/new/public/ckfinder/userfiles/files/minecraft-app-store-free_GM479516143.pdf
    • http://balibetonmandiri.com/new/public/ckfinder/userfiles/files/coin-master-hack-tool-pc-download_GM406889139.pdf
    • http://balibetonmandiri.com/new/public/ckfinder/userfiles/files/roblox-hack-generator_GM431946152.pdf
    • http://balibetonmandiri.com/new/public/ckfinder/userfiles/files/free-robux-generator-for-roblox-2021_GM431946152.pdf
    • http://balibetonmandiri.com/new/public/ckfinder/userfiles/files/free-coin-master-spins-2021_GM406889139.pdf
    • http://balibetonmandiri.com/new/public/ckfinder/userfiles/files/hacks-for-minecraft-windows-10_GM479516143.pdf
    • http://balibetonmandiri.com/new/public/ckfinder/userfiles/files/free-2021-robux_GM431946152.pdf
    • http://balibetonmandiri.com/new/public/ckfinder/userfiles/files/rewardrobux-com_GM431946152.pdf
    • http://balibetonmandiri.com/new/public/ckfinder/userfiles/files/free-spin-link-for-coin-master-game_GM406889139.pdf
    • http://balibetonmandiri.com/new/public/ckfinder/userfiles/files/coin-master-hack-apk-2021-download_GM406889139.pdf
    • http://balibetonmandiri.com/new/public/ckfinder/userfiles/files/how-to-get-100-robux-for-free_GM431946152.pdf
    • http://balibetonmandiri.com/new/public/ckfinder/userfiles/files/coin-master-hack-review_GM406889139.pdf
    • http://balibetonmandiri.com/new/public/ckfinder/userfiles/files/collect-robux_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004ba0.bin
41b89107ee7a2dc7ee154de9aa9736d9b2f8471122ee791f716a50c463bafa44		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4BA0 25168 bytes
font_01_sfnt_off000085b7.bin
3fb127b764b9d10f5525bc4de5ec8316de704409ccb0cf21cff3ad8a30d11676		 pdf-font-stream PDF embedded font (sfnt) at offset 0x85B7 2840 bytes
font_02_sfnt_off00008f69.bin
bdba0893d178c93f7db8dfb8e75fc125deebdc91658f3b2576607bd83519404f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8F69 18672 bytes

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