Malicious PDF — malware analysis report

Static analysis result for SHA-256 416065fe6fade549…

MALICIOUS

PDF

50.1 KB Created: 2021-05-12 17:30:19 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: a15f18c7fd84f9c9b8a1bb0d5920b555 SHA-1: 9ad823b1273a8e2878a2325a12325f44ea321b88 SHA-256: 416065fe6fade54910e9103906f2e6e7ed309286a0aabf97e2913cbf1c5836da
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 a malicious link. The embedded URI points to a URL that promises free Robux, a common lure for gaming-related scams. The ML classifier also flagged this PDF as malicious with high confidence.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9349

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/free-robux-no-verification-no-download-2021-game-hack
    • https://kunstmalen.ch/images/free-roblox-hack_GM431946152.pdf
    • https://kunstmalen.ch/images/master-coin-hack-apk_GM406889139.pdf
    • https://kunstmalen.ch/images/free-spins-coin-master_GM406889139.pdf
    • https://kunstmalen.ch/images/coin-master-free-spins-link-2021-today_GM406889139.pdf
    • https://kunstmalen.ch/images/free-coins-coin-master-link-today_GM406889139.pdf
    • https://kunstmalen.ch/images/minecraft-free-download-linux_GM479516143.pdf
    • https://kunstmalen.ch/images/free-robux-without-downloading-apps_GM431946152.pdf
    • https://kunstmalen.ch/images/how-much-robux-can-you-get-with-1-million-dollars_GM431946152.pdf
    • https://kunstmalen.ch/images/free-coins-for-coin-master_GM406889139.pdf
    • https://kunstmalen.ch/images/how-to-get-free-clothes-on-roblox_GM431946152.pdf
    • https://kunstmalen.ch/images/get-free-robux-2021_GM431946152.pdf
    • https://kunstmalen.ch/images/coin-master-blogspot-links_GM406889139.pdf
    • https://kunstmalen.ch/images/static-moonactive-net-rewards_GM406889139.pdf
    • https://kunstmalen.ch/images/how-do-i-earn-robux_GM431946152.pdf
    • https://kunstmalen.ch/images/roblox-free-robux-no-verification_GM431946152.pdf
    • https://kunstmalen.ch/images/daily-spin_GM406889139.pdf
    • https://kunstmalen.ch/images/free-robux-no-download_GM431946152.pdf
    • https://kunstmalen.ch/images/how-to-hack-in-roblox-prison-life_GM431946152.pdf
    • https://kunstmalen.ch/images/25-free-spins-coin-master_GM406889139.pdf
    • https://kunstmalen.ch/images/best-minecraft-hacked-client_GM479516143.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004eb1.bin
7ebd3e661e091ffa74312905a5d9c97ffc43c63dc6dd0066b10bde74168a8420		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4EB1 29696 bytes
font_01_sfnt_off00009387.bin
4555740682277f0055d57b15bd0ba953e5b51415ea3d21c93db391eace072d4f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9387 2816 bytes
font_02_sfnt_off00009d97.bin
6d060c19cfdcabcdc6bddd80792e5ccefe5b0efd90c0cd3f16f1565492dd4e8c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9D97 19584 bytes

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