PDF malware analysis — malicious · 92e833352b867b64

MALICIOUS

PDF

44.8 KB Created: 2021-06-03 10:51:03 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)

MD5: 3bf41bff4bf89f7fe47f86b1aeb49dc7 SHA-1: 1bd68675ce0731c95f8e5baedfe9669ef435e2b8 SHA-256: 92e833352b867b64f336efbda44003a8ed88638f665fb6702fdcae0faad4e69a

82 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The document presents a fake CAPTCHA and a call-to-action to trick users into clicking a link, which is a common social engineering tactic. The embedded URL points to a resource likely intended to deliver a secondary payload. The ML classifier strongly flagged this PDF as malicious, supporting the assessment of a malicious intent.

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.online/app/431946152/get-free-robux-no-verification-game-hack
- https://ifef.es/ckfinder/userfiles/files/toolbox-for-minecraft-windows-10_GM479516143.pdf
- https://ifef.es/ckfinder/userfiles/files/coin-master-free-coins-twitter_GM406889139.pdf
- https://ifef.es/ckfinder/userfiles/files/roblox-hack_GM431946152.pdf
- https://ifef.es/ckfinder/userfiles/files/free-robux_GM431946152.pdf
- https://ifef.es/ckfinder/userfiles/files/how-to-hack-pubg-mobile-uc-without-human-verification_GM1330123889.pdf
- https://ifef.es/ckfinder/userfiles/files/free-fans-on-tiktok_GM835599320.pdf
- https://ifef.es/ckfinder/userfiles/files/minecraft-svg-images-free_GM479516143.pdf
- https://ifef.es/ckfinder/userfiles/files/best-free-robux-sites_GM431946152.pdf
- https://ifef.es/ckfinder/userfiles/files/how-to-get-free-gamepasses-on-roblox_GM431946152.pdf
- https://ifef.es/ckfinder/userfiles/files/roblox-promo-code-to-get-free-robux_GM431946152.pdf
- https://ifef.es/ckfinder/userfiles/files/free-roblox-card-codes_GM431946152.pdf
- https://ifef.es/ckfinder/userfiles/files/how-to-download-minecraft-for-free-on-android_GM479516143.pdf
- https://ifef.es/ckfinder/userfiles/files/roblox-free-hair-codes_GM431946152.pdf
- https://ifef.es/ckfinder/userfiles/files/daily-free-spins-coin-master_GM406889139.pdf
- https://ifef.es/ckfinder/userfiles/files/coin-master-hack-apk-link_GM406889139.pdf
- https://ifef.es/ckfinder/userfiles/files/free-game-pack-with-google-play-coin-master_GM406889139.pdf
- https://ifef.es/ckfinder/userfiles/files/roblox-free-clothes-hack-2021_GM431946152.pdf
- https://ifef.es/ckfinder/userfiles/files/online-hacking-tricks-coin-master_GM406889139.pdf
- https://ifef.es/ckfinder/userfiles/files/coin-master-free-link-facebook_GM406889139.pdf
- https://ifef.es/ckfinder/userfiles/files/minecraft-free-download-2021_GM479516143.pdf
- http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`stream_004_off0000506a.bin` `03213a6667195c8b6120c0c3abeeb741e8e1d41c9a1ccff05edeb2c12714a43e`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x506A	25416 bytes
`font_01_sfnt_off00008b67.bin` `9922d9be899d889309b30d551f0ca0ad5440aa2f545e895e218caf9f3be39a86`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x8B67	18600 bytes

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