PDF malware analysis — malicious · f29a06fcd9834ae8

MALICIOUS

PDF

49.7 KB Created: 2021-06-03 12:26:32 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)

MD5: afa3b899e556fb826ea0598ed2649ccc SHA-1: be1c1a2151c0951fa5bf1c5e978d361afca922f4 SHA-256: f29a06fcd9834ae87457af9e45450d422cd60caa7ec4c2c88d07647146c53756

142 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

This PDF document exhibits characteristics of a malicious lure, employing a fake CAPTCHA to trick users into interacting with it. It contains a large number of external links, many pointing to SEO-optimized PDF files, suggesting a link farm or content-spinning operation. The primary URL, https://netcdn.online/app/431946152/free-robux-reddit-game-hack, is likely a gateway to a scam or further malicious content.

Machine Learning

Nyx PDF Classifier malicious score 0.9871

Heuristics 5

Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM

Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
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/free-robux-reddit-game-hack
- https://ifef.es/ckfinder/userfiles/files/how-to-get-free-robux-without-download-apps-or-survey_GM431946152.pdf
- https://ifef.es/ckfinder/userfiles/files/haktuts-coin-master-free-spins-2021_GM406889139.pdf
- https://ifef.es/ckfinder/userfiles/files/coin-master-free-spins-link-2021-ios_GM406889139.pdf
- https://ifef.es/ckfinder/userfiles/files/how-to-get-free-coins-for-coin-master_GM406889139.pdf
- https://ifef.es/ckfinder/userfiles/files/how-to-make-free-robux_GM431946152.pdf
- https://ifef.es/ckfinder/userfiles/files/minecraft-clipart-free_GM479516143.pdf
- https://ifef.es/ckfinder/userfiles/files/toolbox-for-minecraft-ios_GM479516143.pdf
- https://ifef.es/ckfinder/userfiles/files/free-robux-microsoft_GM431946152.pdf
- https://ifef.es/ckfinder/userfiles/files/coin-master-hack-apk-2021-download_GM406889139.pdf
- https://ifef.es/ckfinder/userfiles/files/how-to-hack-roblox-accounts-2021-easy_GM431946152.pdf
- https://ifef.es/ckfinder/userfiles/files/roblox-arsenal-hacks-download_GM431946152.pdf
- https://ifef.es/ckfinder/userfiles/files/free-mods-for-coin-master_GM406889139.pdf
- https://ifef.es/ckfinder/userfiles/files/coin-master-free-coins-and-spins-daily_GM406889139.pdf
- https://ifef.es/ckfinder/userfiles/files/https-oprewards-com-roblox_GM431946152.pdf
- https://ifef.es/ckfinder/userfiles/files/coin-master-hack-apk-2021-ios_GM406889139.pdf
- https://ifef.es/ckfinder/userfiles/files/how-to-robux_GM431946152.pdf
- https://ifef.es/ckfinder/userfiles/files/games-that-give-you-free-robux_GM431946152.pdf
- https://ifef.es/ckfinder/userfiles/files/minecraft-iphone-free_GM479516143.pdf
- https://ifef.es/ckfinder/userfiles/files/plug-toolbox-for-minecraft-free-ios_GM479516143.pdf
- https://ifef.es/ckfinder/userfiles/files/coin-master-free-spins-and-coins-without-human-verification_GM406889139.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_off000051a5.bin` `ba87f69e5962510e9260ed7ccc33b0917341dab319b85feec41972643423be9e`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x51A5	36508 bytes
`font_01_sfnt_off00009fdc.bin` `c557a72efce44f866a9d9d033701dfd5e052f904d36d096978818f2976e16735`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x9FDC	18412 bytes

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