Malicious PDF — malware analysis report

Static analysis result for SHA-256 accbc2f223b56a6a…

MALICIOUS

PDF

42.2 KB Created: 2021-05-13 09:30:33 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 70674efdad8b54f201bae174d128e351 SHA-1: ff0c5bfbd4dae9b9f7625455e8ea307dc3952c54 SHA-256: accbc2f223b56a6a8c627ad8de40c5fd45ffbcaf4ab4918352692d138e4592b3
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The document presents a fake CAPTCHA or human verification prompt, a common lure to trick users into clicking malicious links. The embedded URL, https://netcdn.xyz/app/431946152/roblox-help-free-robux-game-hack, likely leads to a second-stage payload download. The ML classifier also flagged this PDF as malicious with high confidence.

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/roblox-help-free-robux-game-hack
    • http://www.hotel-seminaire.com/images/coin-master-hack-link_GM406889139.pdf
    • http://www.hotel-seminaire.com/images/free-spin-app-for-coin-master_GM406889139.pdf
    • http://www.hotel-seminaire.com/images/coin-master-free-spins-link-blogspot-2021_GM406889139.pdf
    • http://www.hotel-seminaire.com/images/how-to-get-free-spins-on-coin-master-2021_GM406889139.pdf
    • http://www.hotel-seminaire.com/images/free-to-play-minecraft-servers_GM479516143.pdf
    • http://www.hotel-seminaire.com/images/free-spins-coin-master-unlimited_GM406889139.pdf
    • http://www.hotel-seminaire.com/images/how-to-get-free-robux-com_GM431946152.pdf
    • http://www.hotel-seminaire.com/images/coin-master-collect-today-free-spin_GM406889139.pdf
    • http://www.hotel-seminaire.com/images/how-to-get-free-robux-youtube_GM431946152.pdf
    • http://www.hotel-seminaire.com/images/how-to-get-free-robux-without-verifying_GM431946152.pdf
    • http://www.hotel-seminaire.com/images/roblox-arsenal-hack_GM431946152.pdf
    • http://www.hotel-seminaire.com/images/free-coin-master-generator_GM406889139.pdf
    • http://www.hotel-seminaire.com/images/how-to-hack-coin-master-without-root_GM406889139.pdf
    • http://www.hotel-seminaire.com/images/coin-master-free-gold-cards-link-2021ee-spins_GM406889139.pdf
    • http://www.hotel-seminaire.com/images/coin-master-free-spins-and-coins-hack_GM406889139.pdf
    • http://www.hotel-seminaire.com/images/free-robux-codes_GM431946152.pdf
    • http://www.hotel-seminaire.com/images/coin-master-free-cards-link_GM406889139.pdf
    • http://www.hotel-seminaire.com/images/free-robux-hacks-no-verification_GM431946152.pdf
    • http://www.hotel-seminaire.com/images/coin-master-hack-pc-free_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off000048a7.bin
3e855a43aa145d78131494498efd3bc9525bbe8b6d7d9a9e7ed04d978f57f72d		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x48A7 25852 bytes
font_01_sfnt_off000082c5.bin
4686decc205f725eac2af31d2bb610515d085fb80a4fbb870416018a21b04127		 pdf-font-stream PDF embedded font (sfnt) at offset 0x82C5 18264 bytes

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