PDF malware analysis — malicious · 1b608dfedeb6b9d1

MALICIOUS

PDF

43.9 KB Created: 2021-05-17 12:32:26 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)

MD5: dcd41e71319b7986d7ecde14d0cdd97e SHA-1: 2d40a66f06f95a34783169b7f0b40fc394803bf8 SHA-256: 1b608dfedeb6b9d18ba12ee76eaad17326125978b409f969c4e8cdf296ea549b

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 users into interacting with malicious links. It embeds multiple URLs pointing to what appear to be game-related downloads or cheats, suggesting a phishing or malware distribution attempt. The ML classifier strongly flagged this PDF as malicious, supporting the observed lure.

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/robux-sites-game-hack
- http://niceviaapia.com.br/images/ckfinder/files/minecraft-bedrock-for-free_GM479516143.pdf
- http://niceviaapia.com.br/images/ckfinder/files/coin-master-download_GM406889139.pdf
- http://niceviaapia.com.br/images/ckfinder/files/free-robux-roblox-promo-codes_GM431946152.pdf
- http://niceviaapia.com.br/images/ckfinder/files/free-robux-now_GM431946152.pdf
- http://niceviaapia.com.br/images/ckfinder/files/spin-coin-master-free_GM406889139.pdf
- http://niceviaapia.com.br/images/ckfinder/files/roblox-free-vip-server_GM431946152.pdf
- http://niceviaapia.com.br/images/ckfinder/files/how-to-downgrade-minecraft-pe_GM479516143.pdf
- http://niceviaapia.com.br/images/ckfinder/files/earn-robux-today_GM431946152.pdf
- http://niceviaapia.com.br/images/ckfinder/files/get-free-robux-gg_GM431946152.pdf
- http://niceviaapia.com.br/images/ckfinder/files/free-daily-spins-coin-master-2021_GM406889139.pdf
- http://niceviaapia.com.br/images/ckfinder/files/coin-master-free-spin-codes_GM406889139.pdf
- http://niceviaapia.com.br/images/ckfinder/files/coin-master-hack-apk-ios_GM406889139.pdf
- http://niceviaapia.com.br/images/ckfinder/files/coin-master-hack-pro-gamers_GM406889139.pdf
- http://niceviaapia.com.br/images/ckfinder/files/minecraft-java-free-download_GM479516143.pdf
- http://niceviaapia.com.br/images/ckfinder/files/robux-free-promo-codes_GM431946152.pdf
- http://niceviaapia.com.br/images/ckfinder/files/coin-master-hack-spin-link_GM406889139.pdf
- http://niceviaapia.com.br/images/ckfinder/files/minecraft-dungeons-free_GM479516143.pdf
- http://niceviaapia.com.br/images/ckfinder/files/how-to-hack-minecraft_GM479516143.pdf
- http://niceviaapia.com.br/images/ckfinder/files/free-robux-2021-no-verification_GM431946152.pdf
- http://niceviaapia.com.br/images/ckfinder/files/coin-master-free-spins-today-daily-links_GM406889139.pdf
- http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off00004b9a.bin` `6d2dfe0b86e7d80c59fc5d8054040867ff4d39f12ac883c55d6e2d30957dfe28`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x4B9A	28316 bytes
`font_01_sfnt_off000089bc.bin` `bb0e23d99157114c27109853e2f6df58cffb1012a33fbc76ebf3c99b95840ec8`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x89BC	18076 bytes

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