Malicious PDF — malware analysis report

Static analysis result for SHA-256 865fc869dd4d0e76…

MALICIOUS

PDF

49.1 KB Created: 2021-06-08 17:35:57 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: c43e8b5f5e7535c94853b3480825d519 SHA-1: 6a401cfeb9d1c2386777f16cbebad5f32885fe64 SHA-256: 865fc869dd4d0e765f1539a41a1299ece610737c55887697048a8530f1415c31
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The document presents a fake CAPTCHA or human verification prompt, a common lure for users seeking game cheats or hacks. It contains multiple embedded URLs pointing to external sites that host similar lures, suggesting a phishing or malware distribution campaign. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9871

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.tw/app/431946152/roblox-hack-site-roblox-unlimited-game-hack
    • http://johnrealestate.in/ckeditor-ckfinder-integration/uploads/files/roblox-free-play-no-download_GM431946152.pdf
    • http://johnrealestate.in/ckeditor-ckfinder-integration/uploads/files/coin-master-games-hack_GM406889139.pdf
    • http://johnrealestate.in/ckeditor-ckfinder-integration/uploads/files/minecraft-free-version-pc_GM479516143.pdf
    • http://johnrealestate.in/ckeditor-ckfinder-integration/uploads/files/free-robux-with-no-verification-2021_GM431946152.pdf
    • http://johnrealestate.in/ckeditor-ckfinder-integration/uploads/files/free-roblox-accounts-with-robux_GM431946152.pdf
    • http://johnrealestate.in/ckeditor-ckfinder-integration/uploads/files/free-spins-coin-master-daily_GM406889139.pdf
    • http://johnrealestate.in/ckeditor-ckfinder-integration/uploads/files/free-minecraft-texture-packs_GM479516143.pdf
    • http://johnrealestate.in/ckeditor-ckfinder-integration/uploads/files/freespinandcoinblogspotcom-2021-11-coinmasterfreespinandcoinlinkshtml_GM406889139.pdf
    • http://johnrealestate.in/ckeditor-ckfinder-integration/uploads/files/minecraft-windows-10-key-free_GM479516143.pdf
    • http://johnrealestate.in/ckeditor-ckfinder-integration/uploads/files/roblox-com-free-robux_GM431946152.pdf
    • http://johnrealestate.in/ckeditor-ckfinder-integration/uploads/files/minecraft-gun-games-free_GM479516143.pdf
    • http://johnrealestate.in/ckeditor-ckfinder-integration/uploads/files/coin-master-hack-tool-v1-9-download-free_GM406889139.pdf
    • http://johnrealestate.in/ckeditor-ckfinder-integration/uploads/files/coin-master-free-spons-apk-2021_GM406889139.pdf
    • http://johnrealestate.in/ckeditor-ckfinder-integration/uploads/files/online-coin-master-free-spin-app_GM406889139.pdf
    • http://johnrealestate.in/ckeditor-ckfinder-integration/uploads/files/free-robux-generator-no-human-verification_GM431946152.pdf
    • http://johnrealestate.in/ckeditor-ckfinder-integration/uploads/files/how-to-hack-roblox-accounts-2021-easy_GM431946152.pdf
    • http://johnrealestate.in/ckeditor-ckfinder-integration/uploads/files/moonactive-coin-master-free-spins_GM406889139.pdf
    • http://johnrealestate.in/ckeditor-ckfinder-integration/uploads/files/free-daily-coin-master-coins_GM406889139.pdf
    • http://johnrealestate.in/ckeditor-ckfinder-integration/uploads/files/real-free-robux-codes_GM431946152.pdf
    • http://johnrealestate.in/ckeditor-ckfinder-integration/uploads/files/how-to-hack-coin-master-apkmody_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000053c7.bin
fe6bfabe9ca7399d1f3fb62c15478e751d8ba54675f477a67f9eae6f6b7d22d4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x53C7 31008 bytes
font_01_sfnt_off00009b3b.bin
f2efd1f94549148f6bba03a292ecb5e050c1f78424d5405ad801a23431d8b5ee		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9B3B 19024 bytes

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