Malicious PDF — malware analysis report

Static analysis result for SHA-256 955baf3e526bbcf2…

MALICIOUS

PDF

42.8 KB Created: 2021-05-16 09:03:45 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 2651f3886d0f7d715dd1c5980bbd6bb2 SHA-1: 503d8a1b62b56f4a5ba4762a41627710e89d9460 SHA-256: 955baf3e526bbcf27f9c186498c02e72998f3409a799a71b31eb3d93f36a0c5a
82 Risk Score

Malware Insights

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

The sample is a PDF that displays a fake CAPTCHA or human verification prompt to trick users into clicking a link. This link, 'https://netcdn.xyz/app/406889139/free-spin-link-game-hack', likely leads to the download of a second-stage payload. The presence of multiple URLs pointing to similar game-hack related PDFs suggests a campaign distributing malicious documents for game-related exploits.

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/406889139/free-spin-link-game-hack
    • http://muckrossparkcollege.com/images/free-spin-codes-coin-master_GM406889139.pdf
    • http://muckrossparkcollege.com/images/roblox-free-robux-no-verification_GM431946152.pdf
    • http://muckrossparkcollege.com/images/can-you-make-a-minecraft-server-for-free_GM479516143.pdf
    • http://muckrossparkcollege.com/images/minecraft-hacks-xbox_GM479516143.pdf
    • http://muckrossparkcollege.com/images/rbxcity-free-robux_GM431946152.pdf
    • http://muckrossparkcollege.com/images/coin-master-ultra-attack-hack_GM406889139.pdf
    • http://muckrossparkcollege.com/images/free-robux-no-generator_GM431946152.pdf
    • http://muckrossparkcollege.com/images/free-robux-rewards_GM431946152.pdf
    • http://muckrossparkcollege.com/images/are-robux-generators-safe_GM431946152.pdf
    • http://muckrossparkcollege.com/images/roblox-free-followers_GM431946152.pdf
    • http://muckrossparkcollege.com/images/free-robux-accounts-2021_GM431946152.pdf
    • http://muckrossparkcollege.com/images/free-robux-generator_GM431946152.pdf
    • http://muckrossparkcollege.com/images/coin-master-free-spins-2021_GM406889139.pdf
    • http://muckrossparkcollege.com/images/free-robux-pins_GM431946152.pdf
    • http://muckrossparkcollege.com/images/robux-hack-tools_GM431946152.pdf
    • http://muckrossparkcollege.com/images/free-spins-on-coin-master-2021-ios_GM406889139.pdf
    • http://muckrossparkcollege.com/images/coin-master-free-spins-hack-download_GM406889139.pdf
    • http://muckrossparkcollege.com/images/toolbox-apk_GM479516143.pdf
    • http://muckrossparkcollege.com/images/free-robux-without-verification-2021_GM431946152.pdf
    • http://muckrossparkcollege.com/images/roblox-promo-codes-free-robux_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off0000476b.bin
b966c0bca714a323636b20d21d30aa714ddedb9f4b147c7ca4b0fff08d9291b6		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x476B 29036 bytes
font_01_sfnt_off00008732.bin
3affe4290d3c586f8abc652f24a5d7e7753726cbbd633ecc9a81f23a594e743c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8732 17580 bytes

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