PDF malware analysis — malicious · a81f007651953f24

MALICIOUS

PDF

44.3 KB Created: 2021-06-03 14:43:33 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)

MD5: 00a22bff3fd67dd1be03260a75725d4f SHA-1: 0d549d41976ca73627e7bc006f48120fa738342d SHA-256: a81f007651953f245ce880f17f13488e6b7283ba96b8f9bbb6102924c0bbc203

102 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF contains numerous embedded links to external websites, many of which are structured as SEO-optimized PDF links, suggesting a link farm. The primary URL points to a 'free Robux app game hack', indicating a scam or potentially unwanted application lure. The ML classifier also flagged this PDF as malicious with high confidence.

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/431946152/free-robux-app-game-hack
- https://www.jcn.co.uk/uploads/files/files/how-to-get-free-spins-on-coin-master-facebook_GM406889139.pdf
- https://www.jcn.co.uk/uploads/files/files/coin-master-free-spin-and-coin_GM406889139.pdf
- https://www.jcn.co.uk/uploads/files/files/minecraft-free-school_GM479516143.pdf
- https://www.jcn.co.uk/uploads/files/files/coin-master-free-coins-link-2021-today_GM406889139.pdf
- https://www.jcn.co.uk/uploads/files/files/how-to-coin-master-spin-hack_GM406889139.pdf
- https://www.jcn.co.uk/uploads/files/files/get-coin-master-spins-free_GM406889139.pdf
- https://www.jcn.co.uk/uploads/files/files/robux-free-c_GM431946152.pdf
- https://www.jcn.co.uk/uploads/files/files/free-spin-link-coin-master_GM406889139.pdf
- https://www.jcn.co.uk/uploads/files/files/roblox-games-that-give-you-free-robux_GM431946152.pdf
- https://www.jcn.co.uk/uploads/files/files/how-can-i-get-free-robux_GM431946152.pdf
- https://www.jcn.co.uk/uploads/files/files/coin-master-free-spins-and-free-coins_GM406889139.pdf
- https://www.jcn.co.uk/uploads/files/files/free-spin-coin-master-2021-link_GM406889139.pdf
- https://www.jcn.co.uk/uploads/files/files/abd-roblox_GM431946152.pdf
- https://www.jcn.co.uk/uploads/files/files/coin-master-hack-free-spins_GM406889139.pdf
- https://www.jcn.co.uk/uploads/files/files/mathep_GM431946152.pdf
- https://www.jcn.co.uk/uploads/files/files/is-minecraft-earth-free_GM479516143.pdf
- https://www.jcn.co.uk/uploads/files/files/free-spin-link-coin-master-today_GM406889139.pdf
- https://www.jcn.co.uk/uploads/files/files/how-to-get-free-robux-on-mobile_GM431946152.pdf
- https://www.jcn.co.uk/uploads/files/files/how-to-get-minecraft-coins-for-free_GM479516143.pdf
- https://www.jcn.co.uk/uploads/files/files/coin-master-daily-free-spins-blogspot_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_off00004eb7.bin` `c1c30fc6fc6ffce0acb6050f3b909a50283b4f47cb7f8ebedc3aaf88d8a0b508`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x4EB7	25876 bytes
`font_01_sfnt_off00008aef.bin` `b6ab7ec8c8ad827553cf0587115e299062cd48018093aec7e14a56fabc9ede42`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x8AEF	18192 bytes

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