Malicious PDF — malware analysis report

Static analysis result for SHA-256 cce3faa21457f3aa…

MALICIOUS

PDF

36.6 KB Created: 2021-05-22 06:37:58 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 0a60472d98e914c2cfd8e9a0975c2124 SHA-1: 6c156d5440b15839207958a590adc38c3ec9dc34 SHA-256: cce3faa21457f3aa283fb8b7ea9bced50f8023fdbef3288acee06cbe2ccde165
82 Risk Score

Malware Insights

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

The PDF document contains a fake CAPTCHA lure, aiming to trick users into clicking a link to download a game hack. The document body and embedded URLs promote various game cheats and hacks, including for Coin Master and Roblox. The primary malicious URL identified is https://netcdn.xyz/app/406889139/coin-master-free-spins-daily-game-hack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9447

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/coin-master-free-spins-daily-game-hack PDF link annotation
    • http://www.gyfunnews.com/ckfinder/userfiles/files/roblox-website-robux_GM431946152.pdfIn PDF document text
    • http://www.gyfunnews.com/ckfinder/userfiles/files/how-to-get-free-robux-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://www.gyfunnews.com/ckfinder/userfiles/files/free-minecraft-capes-no-mods_GM479516143.pdfIn PDF document text
    • http://www.gyfunnews.com/ckfinder/userfiles/files/coin-master-hack-version-2021-free-download_GM406889139.pdfIn PDF document text
    • http://www.gyfunnews.com/ckfinder/userfiles/files/tiktok-for-free_GM835599320.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off00003514.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3514 24656 bytes
SHA-256: 974adb4bc1a4eac55524da9d001b2d93c4f8484acfd7d71982ed60458b62b3ac
font_01_sfnt_off00006dca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6DCA 18308 bytes
SHA-256: 220bb6194b1ab8a2bb399ca4a862914ac8d15b354bb0df2c737bc67699221dc9

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