Malicious PDF — malware analysis report

Static analysis result for SHA-256 e7c366ac577467d9…

MALICIOUS

PDF

44.5 KB Created: 2021-06-02 16:41:14 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 1096c11db2952de4051af3e811c691bc SHA-1: d62a9f012c29f95fbb31a6fb952c173c9ef039f2 SHA-256: e7c366ac577467d98ff660d1440e15217184c1e472948c5ff0b3948ce0288edc
82 Risk Score

Malware Insights

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

The PDF document contains a fake CAPTCHA lure, designed to trick the user into interacting with the document. It also contains an embedded URI pointing to a suspicious URL, likely intended to download a second-stage payload. The ML classifier also flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

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/roblox-twisted-murderer-free-credits-givaway-game-hack
    • http://fobh.net/userfiles/files/free-spins-coin-master-legit_GM406889139.pdf
    • http://fobh.net/userfiles/files/how-to-get-free-robux-2021-no-human-verification_GM431946152.pdf
    • http://fobh.net/userfiles/files/coin-master-mod-version-free-download-ios_GM406889139.pdf
    • http://fobh.net/userfiles/files/coin-master-hack-mod-apk-2021_GM406889139.pdf
    • http://fobh.net/userfiles/files/minecraft-mobile-free_GM479516143.pdf
    • http://fobh.net/userfiles/files/free-robux-reddit_GM431946152.pdf
    • http://fobh.net/userfiles/files/hacking-apps-for-roblox_GM431946152.pdf
    • http://fobh.net/userfiles/files/coin-master-online-free-spin_GM406889139.pdf
    • http://fobh.net/userfiles/files/robux-no-human-verification-2021_GM431946152.pdf
    • http://fobh.net/userfiles/files/how-to-get-free-robux-easy_GM431946152.pdf
    • http://fobh.net/userfiles/files/roblox-royale-high-diamond-hack_GM431946152.pdf
    • http://fobh.net/userfiles/files/roblox-help-free-robux_GM431946152.pdf
    • http://fobh.net/userfiles/files/claimrbx-free-robux_GM431946152.pdf
    • http://fobh.net/userfiles/files/how-to-get-free-robux-on-roblox_GM431946152.pdf
    • http://fobh.net/userfiles/files/coin-master-hack-version-33-2_GM406889139.pdf
    • http://fobh.net/userfiles/files/free-minecraft-bedrock-server_GM479516143.pdf
    • http://fobh.net/userfiles/files/free-robux-websites-that-actually-work_GM431946152.pdf
    • http://fobh.net/userfiles/files/free-robux-2021_GM431946152.pdf
    • http://fobh.net/userfiles/files/minecraft-pe-hacks_GM479516143.pdf
    • http://fobh.net/userfiles/files/coin-master-mod-apk-unlimited-spin-download-free-full-version_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00004e0c.bin
6623b1b164c8a0dfe704136ae128ce2cdeeb5aaf92d15cc0b2cba3d80b35dc36		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4E0C 25192 bytes
font_01_sfnt_off00008825.bin
f57ca0f978ee39e385fcf130550fb8937112c572f9ea7c0c3fac26b44fc0be67		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8825 19368 bytes

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