PDF malware analysis — malicious · 7c4416b8b3c27675

MALICIOUS

PDF

44.2 KB Created: 2021-05-19 23:05:53 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)

MD5: 2497e65fe6509533d321152e07ae638e SHA-1: 81ec9b88fddc95a1e6079afeee25fe3833ee0346 SHA-256: 7c4416b8b3c2767596ffdcbe5aa5e91a1406ed69264e4891d343dc987f318713

102 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF contains a large number of external links, many of which are SEO-optimized and point to other PDF files, suggesting a link farm designed to drive traffic or distribute malicious content. The presence of a 'download button' heuristic further supports the idea that the document is intended to trick users into clicking through to potentially harmful sites. The ML classifier also flagged this PDF as malicious with high confidence.

Machine Learning

Nyx PDF Classifier malicious score 0.9648

Heuristics 4

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.
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/earn-points-for-robux-game-hack
- https://i-photo7.com/image/data/files/how-to-get-free-robux-in-2021_GM431946152.pdf
- https://i-photo7.com/image/data/files/roblox-girl_GM431946152.pdf
- https://i-photo7.com/image/data/files/free-spin-coin-master-new-link_GM406889139.pdf
- https://i-photo7.com/image/data/files/coin-master-gameplay_GM406889139.pdf
- https://i-photo7.com/image/data/files/how-to-hack-roblox-to-get-robux_GM431946152.pdf
- https://i-photo7.com/image/data/files/free-roblox-hack-us_GM431946152.pdf
- https://i-photo7.com/image/data/files/como-hackear-coin-master-iphone_GM406889139.pdf
- https://i-photo7.com/image/data/files/roblox-promo-codes-for-free-robux_GM431946152.pdf
- https://i-photo7.com/image/data/files/microsoft-robux_GM431946152.pdf
- https://i-photo7.com/image/data/files/how-to-get-free-robux-for-free_GM431946152.pdf
- https://i-photo7.com/image/data/files/how-to-hack-someones-roblox-account_GM431946152.pdf
- https://i-photo7.com/image/data/files/minecraft-hack-client-download_GM479516143.pdf
- https://i-photo7.com/image/data/files/how-to-hack-people-in-roblox_GM431946152.pdf
- https://i-photo7.com/image/data/files/blogger-free-spins-and-coins_GM406889139.pdf
- https://i-photo7.com/image/data/files/coin-master-free-coins-hack_GM406889139.pdf
- https://i-photo7.com/image/data/files/free-spins-coin-master-2021_GM406889139.pdf
- https://i-photo7.com/image/data/files/tiktok-free-view-iphone-wallpaper_GM835599320.pdf
- https://i-photo7.com/image/data/files/coin-master-free-link-facebook_GM406889139.pdf
- https://i-photo7.com/image/data/files/free-spin-coin-master-hacktoman_GM406889139.pdf
- https://i-photo7.com/image/data/files/minecraft-apk-free-download-016-0_GM479516143.pdf
- http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000466a.bin` `f2056269b8a9a1a0cf84dbebdc265da592258b72bd93cab1689373407f0d1ca5`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x466A	24836 bytes
`font_01_sfnt_off00007f3a.bin` `baad2f3f6808f4af03fa9398e38c580c8d846f7f773a947d8cc1f39b2753d31a`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x7F3A	2844 bytes
`font_02_sfnt_off000088fc.bin` `c017815f7eb6531c9e4acdde9d92c09258657893b573c7da0b65812d86d29b72`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x88FC	18620 bytes

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