PDF malware analysis — malicious · 10a7e371d64ef8c5

MALICIOUS

PDF

44.1 KB Created: 2021-06-03 07:26:08 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)

MD5: 10f85a8bb709dd90c8dc676178019fa0 SHA-1: 2342f218d83354051904e53a6ae0589ac6933aef SHA-256: 10a7e371d64ef8c56ef6787d58db4b8ed2adb252d50056cbd3cbc945c008988c

102 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF contains a large number of external links, identified as a link farm, with many pointing to game-related cheat pages. The ML classifier strongly indicated maliciousness, and the presence of embedded URIs suggests an attempt to redirect users to potentially harmful content. The document body, though partially corrupted, contains text related to 'Coin Master Free Spins' and a URL, reinforcing the lure. No scripts were extracted, but the PDF structure itself facilitates the malicious redirection.

Machine Learning

Nyx PDF Classifier malicious score 0.9865

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.online/app/406889139/coin-master-free-spins-11-01-2021-game-hack
- https://www.furtherstudies.my/uploaded_files/userfiles/files/coin-master-cheats_GM406889139.pdf
- https://www.furtherstudies.my/uploaded_files/userfiles/files/como-conseguir-monedas-infinitas-y-tiradas-de-coin-master-hack_GM406889139.pdf
- https://www.furtherstudies.my/uploaded_files/userfiles/files/coin-master-daily-free-spins-25_GM406889139.pdf
- https://www.furtherstudies.my/uploaded_files/userfiles/files/minecraft-hacks-wurst_GM479516143.pdf
- https://www.furtherstudies.my/uploaded_files/userfiles/files/daily-free-spins-on-coin-master_GM406889139.pdf
- https://www.furtherstudies.my/uploaded_files/userfiles/files/free-spins-from-coin-master_GM406889139.pdf
- https://www.furtherstudies.my/uploaded_files/userfiles/files/coin-master-free-snacks-link_GM406889139.pdf
- https://www.furtherstudies.my/uploaded_files/userfiles/files/80-free-spins-coin-master_GM406889139.pdf
- https://www.furtherstudies.my/uploaded_files/userfiles/files/how-to-make-a-private-server-on-roblox-for-free_GM431946152.pdf
- https://www.furtherstudies.my/uploaded_files/userfiles/files/tiktok-likes-free_GM835599320.pdf
- https://www.furtherstudies.my/uploaded_files/userfiles/files/are-minecraft-realms-free_GM479516143.pdf
- https://www.furtherstudies.my/uploaded_files/userfiles/files/tiktok-free-view-like-video_GM835599320.pdf
- https://www.furtherstudies.my/uploaded_files/userfiles/files/how-you-get-free-robux_GM431946152.pdf
- https://www.furtherstudies.my/uploaded_files/userfiles/files/how-do-u-hack-roblox_GM431946152.pdf
- https://www.furtherstudies.my/uploaded_files/userfiles/files/coin-master-free-spins-glitch_GM406889139.pdf
- https://www.furtherstudies.my/uploaded_files/userfiles/files/free-roblox-accounts-with-robux-that-work-2021_GM431946152.pdf
- https://www.furtherstudies.my/uploaded_files/userfiles/files/how-to-get-free-spins-coin-master_GM406889139.pdf
- https://www.furtherstudies.my/uploaded_files/userfiles/files/free-coins-and-spins-for-coin-master_GM406889139.pdf
- https://www.furtherstudies.my/uploaded_files/userfiles/files/moonactive-coin-master-free-spins-link_GM406889139.pdf
- https://www.furtherstudies.my/uploaded_files/userfiles/files/coin-master-free-coins-2021_GM406889139.pdf
- http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`stream_004_off00005083.bin` `c09aabfb4b0f3510f312c55c50b3b53771453e0cccfd209953b45f981dc9be10`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x5083	24896 bytes
`font_01_sfnt_off0000899f.bin` `24895b65f98328fb27e7c69f6686c9deb14e0c1b0b62a883e5ab50589681f060`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x899F	18288 bytes

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