Malicious PDF — malware analysis report

Static analysis result for SHA-256 93da197ce874f051…

MALICIOUS

PDF

45.6 KB Created: 2021-05-13 23:40:12 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: f4243eb21039b3d1aa1cda37a8ed971e SHA-1: 531128201da47c8b8ec391ae42879f22a2c156d5 SHA-256: 93da197ce874f0514d60652749864752c3a79fb661460005d789d78007a5a38c
82 Risk Score

Malware Insights

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

The document displays a fake CAPTCHA to lure the user into downloading a file, likely a game cheat or hack, from the embedded URL. The ML classifier strongly indicated maliciousness, and the presence of multiple download-related URLs supports this. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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-app-real-game-hack
    • https://distribuidorademoveis.com.br/ckfinder/userfiles/files/free-minecraft-java-server_GM479516143.pdf
    • https://distribuidorademoveis.com.br/ckfinder/userfiles/files/coin-master-hack-fast_GM406889139.pdf
    • https://distribuidorademoveis.com.br/ckfinder/userfiles/files/how-to-get-free-robux-app_GM431946152.pdf
    • https://distribuidorademoveis.com.br/ckfinder/userfiles/files/roblox-gift-card-online-free_GM431946152.pdf
    • https://distribuidorademoveis.com.br/ckfinder/userfiles/files/free-robux-without-human-verification-real_GM431946152.pdf
    • https://distribuidorademoveis.com.br/ckfinder/userfiles/files/minecraft-mod-updater_GM479516143.pdf
    • https://distribuidorademoveis.com.br/ckfinder/userfiles/files/minecraft-free-apk-download-016-0_GM479516143.pdf
    • https://distribuidorademoveis.com.br/ckfinder/userfiles/files/get-free-robux-today_GM431946152.pdf
    • https://distribuidorademoveis.com.br/ckfinder/userfiles/files/minecraft-diamond-finder-hack_GM479516143.pdf
    • https://distribuidorademoveis.com.br/ckfinder/userfiles/files/minecraft-survival-hacks_GM479516143.pdf
    • https://distribuidorademoveis.com.br/ckfinder/userfiles/files/roblox-2021-hack_GM431946152.pdf
    • https://distribuidorademoveis.com.br/ckfinder/userfiles/files/free-robux-glitch-2021_GM431946152.pdf
    • https://distribuidorademoveis.com.br/ckfinder/userfiles/files/roblox-arsenal-hack_GM431946152.pdf
    • https://distribuidorademoveis.com.br/ckfinder/userfiles/files/free-diamonds-coin-master_GM406889139.pdf
    • https://distribuidorademoveis.com.br/ckfinder/userfiles/files/pro-free-spins-coin-master_GM406889139.pdf
    • https://distribuidorademoveis.com.br/ckfinder/userfiles/files/coin-master-hack-without-verification-2021_GM406889139.pdf
    • https://distribuidorademoveis.com.br/ckfinder/userfiles/files/free-coin-master-spins_GM406889139.pdf
    • https://distribuidorademoveis.com.br/ckfinder/userfiles/files/coin-master-free-spins-and-coins-hack_GM406889139.pdf
    • https://distribuidorademoveis.com.br/ckfinder/userfiles/files/how-to-hack-roblox-to-get-free-robux_GM431946152.pdf
    • https://distribuidorademoveis.com.br/ckfinder/userfiles/files/is-there-any-tricks-or-working-hacks-for-coin-master_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004d1a.bin
1b324f7c9053ff602390d44c3ed7c2611214098a7ef838fab2796db8983ef4ad		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4D1A 29552 bytes
font_01_sfnt_off00008f4f.bin
9e447b6d8b47d61e54db9515b6598511f2c2f765926adb3e35dae1cd8ee44e1f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8F4F 18492 bytes

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