Malicious PDF — malware analysis report

Static analysis result for SHA-256 430fd531a6f51045…

MALICIOUS

PDF

43.7 KB Created: 2021-05-13 06:09:06 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 165e608691d85e19fb647014adf2bd8c SHA-1: 62c011c4435c3401e8046f83e7f83bbfb7a6133f SHA-256: 430fd531a6f510454b74e6a6c499cc81ff47e41f00f92f3fb8c254f6d56c60a9
82 Risk Score

Malware Insights

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

The document presents a fake CAPTCHA or human verification prompt to trick the user into clicking a link. The embedded URL, https://netcdn.xyz/app/431946152/roblox-generator-no-human-verification-game-hack, likely leads to a malicious download. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

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-generator-no-human-verification-game-hack
    • http://firstaidacademy.be/images/www-coin-master-hack-xyz_GM406889139.pdf
    • http://firstaidacademy.be/images/free-coin-and-spin-for-coin-master_GM406889139.pdf
    • http://firstaidacademy.be/images/play-coin-master-for-free_GM406889139.pdf
    • http://firstaidacademy.be/images/how-do-you-get-free-food-on-coin-master_GM406889139.pdf
    • http://firstaidacademy.be/images/is-there-an-actual-hack-that-work-for-coin-master_GM406889139.pdf
    • http://firstaidacademy.be/images/is-minecraft-free-on-mac_GM479516143.pdf
    • http://firstaidacademy.be/images/free-robux-microsoft_GM431946152.pdf
    • http://firstaidacademy.be/images/roblox-people-girl_GM431946152.pdf
    • http://firstaidacademy.be/images/roblox-free-robux-hack_GM431946152.pdf
    • http://firstaidacademy.be/images/coin-master-hacks_GM406889139.pdf
    • http://firstaidacademy.be/images/coin-master-free-spins-and-coins-for-iphone_GM406889139.pdf
    • http://firstaidacademy.be/images/coin-master-email-rewards_GM406889139.pdf
    • http://firstaidacademy.be/images/real-free-robux-codes_GM431946152.pdf
    • http://firstaidacademy.be/images/toolbox-for-minecraft-ios_GM479516143.pdf
    • http://firstaidacademy.be/images/coin-master-free-spins-without-human-verification_GM406889139.pdf
    • http://firstaidacademy.be/images/to-get-free-robux_GM431946152.pdf
    • http://firstaidacademy.be/images/rbl-gg-free-robux_GM431946152.pdf
    • http://firstaidacademy.be/images/free-robux-only-username_GM431946152.pdf
    • http://firstaidacademy.be/images/robux-generator-no-human-verification_GM431946152.pdf
    • http://firstaidacademy.be/images/krnl-download_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004bbf.bin
37c334dee66945ec39ef319fa743d4476bcd264a3f65a416aeccfed5d00144f0		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4BBF 25656 bytes
font_01_sfnt_off000086fd.bin
d79baf027547f44448cd8f3b6712cdcd19f331e765a1a7a1a1aa24219739a308		 pdf-font-stream PDF embedded font (sfnt) at offset 0x86FD 18772 bytes

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