PDF malware analysis — malicious · 933ccb735102a237

MALICIOUS

PDF

33.2 KB Created: 2021-07-01 06:04:46 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)

MD5: 9e0202d7b712d95ea5e1613e7b99358e SHA-1: 96ffdc9d242f1c6e7dbca3e7595f5c0e8e37122e SHA-256: 933ccb735102a237fbc2cb240eb16586e82cb628f98f79407158f00ad2204bb7

102 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF document contains numerous embedded URLs and a DOC BODY that promotes 'free Robux' and game hacks, indicating a lure for users to download potentially malicious content. The PDF_SEO_LINK_FARM heuristic suggests a large number of external links, likely for SEO manipulation or to host further malicious content. While no scripts were explicitly extracted, the presence of embedded URLs and the ML_NYX_PDF_MALICIOUS classification strongly suggest malicious intent, likely involving the download of a second-stage payload.

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/free-robux-offers-game-hack
- https://www.ramsburyestates.co.uk/uploads/files/files/wurst-commands_GM479516143.pdf
- https://www.ramsburyestates.co.uk/uploads/files/files/coin-master-free-spins-heaven_GM406889139.pdf
- https://www.ramsburyestates.co.uk/uploads/files/files/coin-master-daily-free-spins-hack_GM406889139.pdf
- https://www.ramsburyestates.co.uk/uploads/files/files/how-to-get-free-robux-no-scam_GM431946152.pdf
- https://www.ramsburyestates.co.uk/uploads/files/files/coin-master-free-spins-link-today_GM406889139.pdf
- https://www.ramsburyestates.co.uk/uploads/files/files/lazy-blocks-com-free-robux_GM431946152.pdf
- https://www.ramsburyestates.co.uk/uploads/files/files/coin-master-spin-hack-2021_GM406889139.pdf
- https://www.ramsburyestates.co.uk/uploads/files/files/free-spins-coin-master-unlimited_GM406889139.pdf
- https://www.ramsburyestates.co.uk/uploads/files/files/websites-for-robux_GM431946152.pdf
- https://www.ramsburyestates.co.uk/uploads/files/files/coin-master-free-download-for-pc_GM406889139.pdf
- https://www.ramsburyestates.co.uk/uploads/files/files/get-free-spins-coin-master-2021_GM406889139.pdf
- https://www.ramsburyestates.co.uk/uploads/files/files/how-to-get-free-robux-in-2021_GM431946152.pdf
- https://www.ramsburyestates.co.uk/uploads/files/files/wurst-hacked-client-112-2_GM479516143.pdf
- https://www.ramsburyestates.co.uk/uploads/files/files/how-to-get-minecraft-for-free-on-ps4-2021_GM479516143.pdf
- https://www.ramsburyestates.co.uk/uploads/files/files/free-coin-master-hacks-no-verification-or-survey_GM406889139.pdf
- https://www.ramsburyestates.co.uk/uploads/files/files/coin-master-free-spin-app-reviews_GM406889139.pdf
- https://www.ramsburyestates.co.uk/uploads/files/files/coin-master-daily-gift-free-spins-and-coins-link_GM406889139.pdf
- https://www.ramsburyestates.co.uk/uploads/files/files/will-minecraft-dungeons-be-free_GM479516143.pdf
- https://www.ramsburyestates.co.uk/uploads/files/files/minecraft-free-games-no-download_GM479516143.pdf
- https://www.ramsburyestates.co.uk/uploads/files/files/coin-master-hacks-free-spins_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_off00002d8b.bin` `d70d0947e62a7b42db2c1c671db3f7d83fba20aed71735fdd23acc79d65b62c7`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x2D8B	21884 bytes
`font_01_sfnt_off00005d83.bin` `b2a17d22e67b04b75eef1a0c9ed7c6f3b11f989c46ee80bf4c682aeec2a97972`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x5D83	18716 bytes

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