Malicious PDF — malware analysis report

Static analysis result for SHA-256 6e4926507ac27a83…

MALICIOUS

PDF

44.2 KB Created: 2021-05-13 01:18:25 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: f0705b259331b158cda6077cac36f72a SHA-1: 10f6e554f25dc66dd9fbd700e72a91688d0bae81 SHA-256: 6e4926507ac27a8335ec273eac27af3012f7d03584a089fcafa2467867a4b251
82 Risk Score

Malware Insights

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

The sample was classified as malicious by an ML model and contains a fake CAPTCHA lure. The document body and embedded URI point to a URL that likely hosts a payload, suggesting the user is intended to click the link to bypass the fake verification and download malware. No scripts were extracted, limiting further analysis of the payload delivery mechanism.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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/406889139/card-hack-in-coin-master-game-hack
    • http://ledtherapysystems.com/images/coin-master-links-for-free-spins-2021_GM406889139.pdf
    • http://ledtherapysystems.com/images/static-moonactive-net-rewards_GM406889139.pdf
    • http://ledtherapysystems.com/images/free-spins-and-coins-coin-master_GM406889139.pdf
    • http://ledtherapysystems.com/images/woman-roblox_GM431946152.pdf
    • http://ledtherapysystems.com/images/coin-master-hack-tool-exe_GM406889139.pdf
    • http://ledtherapysystems.com/images/coin-master-daily-free-rewards_GM406889139.pdf
    • http://ledtherapysystems.com/images/get-free-spins-coin-master-2021_GM406889139.pdf
    • http://ledtherapysystems.com/images/rewards-roblox_GM431946152.pdf
    • http://ledtherapysystems.com/images/free-robux-kid-friendly-no-human-verification_GM431946152.pdf
    • http://ledtherapysystems.com/images/free-minecraft-printables_GM479516143.pdf
    • http://ledtherapysystems.com/images/i-robux_GM431946152.pdf
    • http://ledtherapysystems.com/images/coin-master-free-coins-no-human-verification_GM406889139.pdf
    • http://ledtherapysystems.com/images/blogspot-coin-master-free-spins_GM406889139.pdf
    • http://ledtherapysystems.com/images/coin-master-hack_GM406889139.pdf
    • http://ledtherapysystems.com/images/coin-master-free-soins_GM406889139.pdf
    • http://ledtherapysystems.com/images/how-to-get-free-robux-for-real_GM431946152.pdf
    • http://ledtherapysystems.com/images/mcpe-master-coin-hack-apk_GM406889139.pdf
    • http://ledtherapysystems.com/images/can-i-get-robux-for-free_GM431946152.pdf
    • http://ledtherapysystems.com/images/how-to-get-minecraft-pe-for-free_GM479516143.pdf
    • http://ledtherapysystems.com/images/coin-master-hack-2021-iphone_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004b48.bin
71e96940a8220306955271a605ef79a5c11d795b9161e32f2c98227bd0487449		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4B48 28148 bytes
font_01_sfnt_off00008b91.bin
eac9cb42de6513dc6552a50abee069bf35bf7768323d30e076f8ef6ec09f6223		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8B91 17888 bytes

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