Malicious PDF — malware analysis report

Static analysis result for SHA-256 c709db432c71fe7d…

MALICIOUS

PDF

45.1 KB Created: 2021-06-11 12:17:58 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 1c1b551ff089303ff5fc62803a7b5fab SHA-1: 7afd8ee070eddb401f395e32232b858c68d7ea7d SHA-256: c709db432c71fe7d493656cea31f4b296fd42c168417f8110324e181d3d54639
82 Risk Score

Malware Insights

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

The document presents a fake CAPTCHA and a download button, aiming to trick the user into downloading a file from a provided URL. The embedded URLs and document content suggest a lure related to game hacks and free in-game currency. While no scripts were explicitly extracted, the PDF structure and heuristic firings indicate malicious intent, likely leading to the download of a second-stage payload.

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.tw/app/431946152/www.hacktool.com-free-download-roblox-game-hack
    • http://repository.unla.ac.id/repository/minecraft-life-hacks_GM479516143.pdf
    • http://repository.unla.ac.id/repository/robuxlove-net-free-robux_GM431946152.pdf
    • http://repository.unla.ac.id/repository/coin-master-hack-2021_GM406889139.pdf
    • http://repository.unla.ac.id/repository/coin-master_GM406889139.pdf
    • http://repository.unla.ac.id/repository/coin-master-free-spins-link-2021-hack_GM406889139.pdf
    • http://repository.unla.ac.id/repository/hacking-the-final-stands-roblox_GM431946152.pdf
    • http://repository.unla.ac.id/repository/free-robux-no-survey_GM431946152.pdf
    • http://repository.unla.ac.id/repository/roblox-clothing-hack-2021_GM431946152.pdf
    • http://repository.unla.ac.id/repository/roblox-com-r_GM431946152.pdf
    • http://repository.unla.ac.id/repository/how-can-i-get-free-robux_GM431946152.pdf
    • http://repository.unla.ac.id/repository/coin-master-hack-xyz_GM406889139.pdf
    • http://repository.unla.ac.id/repository/what-is-robux-in-roblox_GM431946152.pdf
    • http://repository.unla.ac.id/repository/free-robux-games_GM431946152.pdf
    • http://repository.unla.ac.id/repository/mechanique-car-simulator-hack-free-roblox_GM431946152.pdf
    • http://repository.unla.ac.id/repository/minecraft-bedrock-client_GM479516143.pdf
    • http://repository.unla.ac.id/repository/how-to-hack-mcpe-master-coins_GM406889139.pdf
    • http://repository.unla.ac.id/repository/coin-master-free-spins-app_GM406889139.pdf
    • http://repository.unla.ac.id/repository/how-to-get-free-face-in-roblox-2021_GM431946152.pdf
    • http://repository.unla.ac.id/repository/coin-master-claim-spins_GM406889139.pdf
    • http://repository.unla.ac.id/repository/master-hack-coin_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00004edc.bin
1efd23ae20d7a96491f31c468b3ca85453c8f29900d9b2d9a1e6ddd79f1dddd1		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4EDC 25784 bytes
font_01_sfnt_off00008a29.bin
cfb6e26585b6cf437097c122949dc918f0db2af9c5be9ff2a75a18189fde605f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8A29 19512 bytes

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