PDF malware analysis — malicious · 3c34c5282b20bac7

MALICIOUS

PDF

33.9 KB Created: 2021-07-04 08:29:02 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)

MD5: d58bbc733dc4de647d290d05bdc8bd2f SHA-1: b41314342eeeb8718bc2e4d3d64dbf6eb6e868e9 SHA-256: 3c34c5282b20bac7adc8c76e51f945007e51a0da1d5a84f4b884754351781a3c

102 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.002 Malicious File

The PDF contains numerous links to external websites, many of which are structured as PDF files hosted on '99champions.com' and appear to be lures for game cheats or currency. The primary URL 'http://netcdn.tw/app/431946152/instantrobux-game-hack' suggests a direct download for a game hack. The ML classifier strongly flagged this PDF as malicious, supporting the conclusion that it is designed to trick users into downloading malware.

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/instantrobux-game-hack
- https://www.99champions.com/uploaded_files/userfiles/files/rbx-claim_GM431946152.pdf
- https://www.99champions.com/uploaded_files/userfiles/files/coin-master-hack-software-download_GM406889139.pdf
- https://www.99champions.com/uploaded_files/userfiles/files/how-to-curse-on-roblox-hack_GM431946152.pdf
- https://www.99champions.com/uploaded_files/userfiles/files/how-to-get-free-food-for-foxy-in-coin-master_GM406889139.pdf
- https://www.99champions.com/uploaded_files/userfiles/files/free-abilities-for-twisted-murderer-on-roblox_GM431946152.pdf
- https://www.99champions.com/uploaded_files/userfiles/files/coin-master-hack-apk-july-29_GM406889139.pdf
- https://www.99champions.com/uploaded_files/userfiles/files/cheat-roblox-skin_GM431946152.pdf
- https://www.99champions.com/uploaded_files/userfiles/files/minecraft-free_GM479516143.pdf
- https://www.99champions.com/uploaded_files/userfiles/files/minecraft-pe_GM479516143.pdf
- https://www.99champions.com/uploaded_files/userfiles/files/coin-master-free-spins-link-2021-haktuts_GM406889139.pdf
- https://www.99champions.com/uploaded_files/userfiles/files/roblox-games-that-give-you-free-robux_GM431946152.pdf
- https://www.99champions.com/uploaded_files/userfiles/files/april-1st-hack-roblox_GM431946152.pdf
- https://www.99champions.com/uploaded_files/userfiles/files/how-to-play-minecraft-for-free_GM479516143.pdf
- https://www.99champions.com/uploaded_files/userfiles/files/coin-master-free-spins-and-coins_GM406889139.pdf
- https://www.99champions.com/uploaded_files/userfiles/files/free-sparkle-time-fedora-badges-roblox_GM431946152.pdf
- https://www.99champions.com/uploaded_files/userfiles/files/is-coin-master-hacks-safe_GM406889139.pdf
- https://www.99champions.com/uploaded_files/userfiles/files/where-to-get-free-robux_GM431946152.pdf
- https://www.99champions.com/uploaded_files/userfiles/files/all-links-for-free-spins-coin-master_GM406889139.pdf
- https://www.99champions.com/uploaded_files/userfiles/files/free-roblox-accounts-with-robux-that-work-2021_GM431946152.pdf
- https://www.99champions.com/uploaded_files/userfiles/files/roblox-jailbreak-jump-hack_GM431946152.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_off000031a2.bin` `ca4ce359eb99ecab300f550009481a3bdd8fa57e96e20444ff3fd6eb6ed3a435`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x31A2	21380 bytes
`font_01_sfnt_off00006057.bin` `5a13a4ba7d4aa3ba564163d7fd1f4e40de414e0c8b16d10ac9018e4301010f0d`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6057	18656 bytes

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