PDF malware analysis — malicious · 1fcf1e3af0387d47

MALICIOUS

PDF

34.7 KB Created: 2021-07-05 14:46:09 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)

MD5: c1a62d6c343c424b4d992be966d5e617 SHA-1: bf4ca37bfab81394e4d9dac64c7dd4c69be0043d SHA-256: 1fcf1e3af0387d47504d4b9397c72e20ab38d021b724f05ac206b71c4604691f

102 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many of which are structured as SEO link farms, all promoting 'free Robux' or similar game-related cheats. The primary URL, http://netcdn.tw/app/431946152/microsoft-free-robux-game-hack, likely hosts a malicious download. The ML classifier strongly indicated maliciousness, and the presence of a 'download button' heuristic further supports a phishing or malware distribution attempt.

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.tw/app/431946152/microsoft-free-robux-game-hack
- https://lib.unitri.ac.id/repository/robux-hack-kostenlos_GM431946152.pdf
- https://lib.unitri.ac.id/repository/how-to-make-tshirts-on-roblox-free_GM431946152.pdf
- https://lib.unitri.ac.id/repository/minecraft-that-you-can-play-for-free_GM479516143.pdf
- https://lib.unitri.ac.id/repository/roblox-cheat-codes_GM431946152.pdf
- https://lib.unitri.ac.id//repository/free-robux-hack-no-human-verification-or-survey_GM431946152.pdf
- https://lib.unitri.ac.id/repository/coin-master-free-spins-and-coins-group_GM406889139.pdf
- https://lib.unitri.ac.id/repository/how-to-hack-money-in-heists-simulator-roblox_GM431946152.pdf
- https://lib.unitri.ac.id/repository/free-coin-master-coins-and-spins_GM406889139.pdf
- https://lib.unitri.ac.id/repository/free-robux-get-com_GM431946152.pdf
- https://lib.unitri.ac.id/repository/free-robux-real-working_GM431946152.pdf
- https://lib.unitri.ac.id/repository/how-to-get-robux-for-free-2021-october_GM431946152.pdf
- https://lib.unitri.ac.id/repository/free-coin-and-spin-in-coin-master_GM406889139.pdf
- https://lib.unitri.ac.id/repository/pokemon-go-font-free-download_GM1094591345.pdf
- https://lib.unitri.ac.id/repository/coin-master_GM406889139.pdf
- https://lib.unitri.ac.id//repository/all-minecraft-handbooks_GM479516143.pdf
- https://lib.unitri.ac.id/repository/nero-cheat-codes-roblox-audio_GM431946152.pdf
- https://lib.unitri.ac.id/repository/get-robux-for-free-generator_GM431946152.pdf
- https://lib.unitri.ac.id/repository/hack-treasure-hunt-simulator-roblox_GM431946152.pdf
- https://lib.unitri.ac.id/repository/roblox-arsenal-hack_GM431946152.pdf
- https://lib.unitri.ac.id//repository/real-free-spins-for-coin-master_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_off00002ef2.bin` `9432c6dce8b4a5a17fe07f812e140c6d6f47541cd330370935089da56714b2d8`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x2EF2	22928 bytes
`font_01_sfnt_off00006284.bin` `eceba35cd6627b8fd8c95b6fc578f752ad37bdbc88f79a1a211c8d87d48b0e2f`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6284	19136 bytes

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