Malicious PDF — malware analysis report

Static analysis result for SHA-256 4e5aafb2910ec924…

MALICIOUS

PDF

43.0 KB Created: 2021-05-16 02:09:13 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: c24b05aa1fceb332676bc43d3541a35c SHA-1: 01a6e9019646c5a3d61dccb8e2238811eedf8a07 SHA-256: 4e5aafb2910ec9243d80a9cbba41eeea83515d160479bd3e7384d6fa7ff7b179
82 Risk Score

Malware Insights

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

The document presents a fake CAPTCHA lure to deceive the user into clicking a link, which is a common tactic for delivering malware. The presence of multiple URLs pointing to game-related hacks and cheats suggests a lure for potentially unwanted software or malware. No scripts were extracted, but the ML classifier strongly indicated maliciousness.

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/robux-converter-game-hack
    • http://malarvadibalasangam.org/ckfinder/userfiles/files/free-coins-for-coin-master_GM406889139.pdf
    • http://malarvadibalasangam.org/ckfinder/userfiles/files/minecraft-hacks_GM479516143.pdf
    • http://malarvadibalasangam.org/ckfinder/userfiles/files/minecraft-java-for-free_GM479516143.pdf
    • http://malarvadibalasangam.org/ckfinder/userfiles/files/minecraft-kill-aura_GM479516143.pdf
    • http://malarvadibalasangam.org/ckfinder/userfiles/files/coin-master-hack-activegamer_GM406889139.pdf
    • http://malarvadibalasangam.org/ckfinder/userfiles/files/free-coins-coin-master-spins_GM406889139.pdf
    • http://malarvadibalasangam.org/ckfinder/userfiles/files/coin-master-fun-hack-online_GM406889139.pdf
    • http://malarvadibalasangam.org/ckfinder/userfiles/files/coin-master-mod-apk-free-download_GM406889139.pdf
    • http://malarvadibalasangam.org/ckfinder/userfiles/files/rbx-roblox_GM431946152.pdf
    • http://malarvadibalasangam.org/ckfinder/userfiles/files/coin-master-hack-mod-apk-free-download_GM406889139.pdf
    • http://malarvadibalasangam.org/ckfinder/userfiles/files/coin-master-free-spins-daily-link-game-mod_GM406889139.pdf
    • http://malarvadibalasangam.org/ckfinder/userfiles/files/roblox-free-vip-server_GM431946152.pdf
    • http://malarvadibalasangam.org/ckfinder/userfiles/files/minecraft-free-download-ios_GM479516143.pdf
    • http://malarvadibalasangam.org/ckfinder/userfiles/files/free-spins-and-coins-on-coin-master_GM406889139.pdf
    • http://malarvadibalasangam.org/ckfinder/userfiles/files/coin-master-free_GM406889139.pdf
    • http://malarvadibalasangam.org/ckfinder/userfiles/files/free-robux-youtube_GM431946152.pdf
    • http://malarvadibalasangam.org/ckfinder/userfiles/files/coin-master-free-spins-2021_GM406889139.pdf
    • http://malarvadibalasangam.org/ckfinder/userfiles/files/coin-master-free-cards-link_GM406889139.pdf
    • http://malarvadibalasangam.org/ckfinder/userfiles/files/cheats-to-get-free-spins-on-coin-master_GM406889139.pdf
    • http://malarvadibalasangam.org/ckfinder/userfiles/files/coin-master-apk-hack-2021-ios_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off000047e4.bin
2b952c6a08d2c2bf41559bd1a180cb20570f7a275e09932b75a9dd2316e8163c		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x47E4 27392 bytes
font_01_sfnt_off0000864e.bin
445b05a7d025cae97bc3d237a95317cdc5e9af3154d94cfe5f369ebdcdfa036d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x864E 18068 bytes

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