PDF malware analysis — malicious · 4915e8ce6a05d3f5

MALICIOUS

PDF

35.6 KB Created: 2021-07-02 03:01:24 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)

MD5: 7e63160df98c6b2aca09a4b53817c807 SHA-1: 5a1bc9dbcf1a1821c2e057920b20e4c2d5fc745e SHA-256: 4915e8ce6a05d3f525b02dfae5fc8c602f2ad4631c16d7d566478f5b088c2798

102 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF document contains numerous embedded URLs and a 'download button' lure, aiming to trick users into visiting malicious sites offering game hacks and 'free Robux'. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external links, suggesting a tactic to distribute malware or phishing content through SEO-optimized PDFs. While no scripts were explicitly extracted, the presence of embedded URLs and the ML classification strongly suggest a malicious intent to redirect users to potentially harmful content.

Machine Learning

Nyx PDF Classifier malicious score 0.9980

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 http://netcdn.co/app/431946152/gamefly-free-robux-game-hack
- https://www.jjautomation.in/uploaded_files/userfiles/files/websites-that-give-you-free-robux_GM431946152.pdf
- https://www.jjautomation.in/uploaded_files/userfiles/files/roblox-how-to-make-a-private-server-for-free_GM431946152.pdf
- https://www.jjautomation.in/uploaded_files/userfiles/files/minecraft-pocket-edition-mods-for-free_GM479516143.pdf
- https://www.jjautomation.in/uploaded_files/userfiles/files/coin-master-apk-hacked-3526_GM406889139.pdf
- https://www.jjautomation.in/uploaded_files/userfiles/files/free-coin-master-gifts_GM406889139.pdf
- https://www.jjautomation.in/uploaded_files/userfiles/files/how-to-prevent-your-roblox-game-from-getting-hacked_GM431946152.pdf
- https://www.jjautomation.in/uploaded_files/userfiles/files/free-spins-for-coin-master-app_GM406889139.pdf
- https://www.jjautomation.in/uploaded_files/userfiles/files/no-bad-words-hack-roblox_GM431946152.pdf
- https://www.jjautomation.in/uploaded_files/userfiles/files/hack-para-tener-robux-en-roblox_GM431946152.pdf
- https://www.jjautomation.in/uploaded_files/userfiles/files/levvvel-coin-master_GM406889139.pdf
- https://www.jjautomation.in/uploaded_files/userfiles/files/roblox-ninja-legends-cheat_GM431946152.pdf
- https://www.jjautomation.in/uploaded_files/userfiles/files/how-to-get-free-robux-from-your-friends_GM431946152.pdf
- https://www.jjautomation.in/uploaded_files/userfiles/files/minecraft-free-download-mac-full-version-2021_GM479516143.pdf
- https://www.jjautomation.in/uploaded_files/userfiles/files/free-robux-that-actually-works_GM431946152.pdf
- https://www.jjautomation.in/uploaded_files/userfiles/files/free-model-game-system-roblox_GM431946152.pdf
- https://www.jjautomation.in/uploaded_files/userfiles/files/pubg-uc-20210_GM1330123889.pdf
- https://www.jjautomation.in/uploaded_files/userfiles/files/how-to-get-robux-free-and-easy_GM431946152.pdf
- https://www.jjautomation.in/uploaded_files/userfiles/files/free-robux-proof-2021_GM431946152.pdf
- https://www.jjautomation.in/uploaded_files/userfiles/files/free-minecraft-com_GM479516143.pdf
- https://www.jjautomation.in/uploaded_files/userfiles/files/free-coin-master-spins-for-today_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_off0000322e.bin` `caf5eebd0fe5546a3077ee4521118faca3146e714daeaa9c0b2eaba8606d6405`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x322E	22916 bytes
`font_01_sfnt_off000065b3.bin` `1b78e368690dee3aec2824abb367ae1fcd8ab6946e334207e8df9d0e063d1fb6`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x65B3	19228 bytes

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