Malicious PDF — malware analysis report

Static analysis result for SHA-256 d4d60a5c00f4aa77…

MALICIOUS

PDF

51.6 KB Created: 2021-06-03 12:40:35 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 3d5e7469653a1fb04ae543c334475623 SHA-1: 934d96e7aebb1f97a6e8ff4ef1178ad5dc27334b SHA-256: d4d60a5c00f4aa77abaefe9546516bcd22a1ced85996f448f34f5b924d034b56
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The document presents a fake CAPTCHA lure to trick users into interacting with malicious links, as indicated by the 'SE_FAKE_CAPTCHA' heuristic. The embedded URLs, such as 'https://netcdn.online/app/431946152/how-to-get-free-robux-hack-2021-game-hack', likely lead to further malicious content or scams. While no scripts were explicitly extracted, the PDF structure and heuristics suggest an attempt to exploit user interaction for payload delivery or redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9657

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.online/app/431946152/how-to-get-free-robux-hack-2021-game-hack
    • https://ifef.es/ckfinder/userfiles/files/free-robux-no-offers_GM431946152.pdf
    • https://ifef.es/ckfinder/userfiles/files/coin-master-free-coins-and-spins-daily_GM406889139.pdf
    • https://ifef.es/ckfinder/userfiles/files/pokemon-go-free-versus-pc_GM1094591345.pdf
    • https://ifef.es/ckfinder/userfiles/files/free-games-like-coin-master_GM406889139.pdf
    • https://ifef.es/ckfinder/userfiles/files/give-me-free-robux_GM431946152.pdf
    • https://ifef.es/ckfinder/userfiles/files/free-flip-master-coins_GM406889139.pdf
    • https://ifef.es/ckfinder/userfiles/files/robux-no-human-verification_GM431946152.pdf
    • https://ifef.es/ckfinder/userfiles/files/free-coins-coin-master_GM406889139.pdf
    • https://ifef.es/ckfinder/userfiles/files/roblox-promo-codes-for-free-robux_GM431946152.pdf
    • https://ifef.es/ckfinder/userfiles/files/roblox-dominus-free_GM431946152.pdf
    • https://ifef.es/ckfinder/userfiles/files/coin-master-hack-apk-2021-ios_GM406889139.pdf
    • https://ifef.es/ckfinder/userfiles/files/hack-to-protect-village-on-coin-master_GM406889139.pdf
    • https://ifef.es/ckfinder/userfiles/files/free-spins-on-coin-master-game_GM406889139.pdf
    • https://ifef.es/ckfinder/userfiles/files/i-need-more-free-spins-on-coin-master_GM406889139.pdf
    • https://ifef.es/ckfinder/userfiles/files/coin-master-free-spins-link-today-haktuts_GM406889139.pdf
    • https://ifef.es/ckfinder/userfiles/files/free-robux-generator-codes_GM431946152.pdf
    • https://ifef.es/ckfinder/userfiles/files/free-minecraft-windows-10-with-java_GM479516143.pdf
    • https://ifef.es/ckfinder/userfiles/files/how-to-get-free-robux-without-any-verification_GM431946152.pdf
    • https://ifef.es/ckfinder/userfiles/files/free-robux-no-human-verification-or-survey-2021_GM431946152.pdf
    • https://ifef.es/ckfinder/userfiles/files/coin-master-hack-ios-cydia_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000051d7.bin
19a227b2589497de010d9c290734be2bb2872a4fc364c302b927238859b9d2cd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x51D7 25396 bytes
font_01_sfnt_off000089fe.bin
eb230542719c96b42e3fd8bb01e35f13ebd5f02629049da3a58e7fd7607bf48a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x89FE 2940 bytes
font_02_sfnt_off00009409.bin
ae114634718854704d615808d33fb1b747d90eb28e420080bd5adbdfe7fb6a27		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9409 6700 bytes
font_03_sfnt_off0000a447.bin
bf126c80224e4ece1a877f3c45a4e2f725662c205f8b78a709aa4c80730d283c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA447 19084 bytes

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