PDF malware analysis — malicious · 63401ff385cc4bf0

MALICIOUS

PDF

47.7 KB Created: 2021-05-16 09:38:50 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)

MD5: a78104ae7cb43b1e7d13358a749a8415 SHA-1: 1a1dad322bd4f5af39e2331d13a52c5875ac31ad SHA-256: 63401ff385cc4bf09f9f88e054767ce08e8b23cd460fbb202db01365dfd59688

102 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document contains numerous external links, identified as a link farm, likely intended for SEO manipulation or to distribute further malicious content. The ML classifier strongly flagged this PDF as malicious, and the presence of a 'download button' lure reinforces the deceptive nature of the document. The primary goal appears to be directing users to external sites, potentially for malware delivery or phishing.

Machine Learning

Nyx PDF Classifier malicious score 0.9013

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.xyz/app/431946152/how-to-get-roebucks-in-roblox-game-hack
- http://thcsducthang.pgdbactuliem.edu.vn/ckfinder/userfiles/files/how-to-download-minecraft-for-free-on-mac_GM479516143.pdf
- http://thcsducthang.pgdbactuliem.edu.vn/ckfinder/userfiles/files/give-free-robux_GM431946152.pdf
- http://thcsducthang.pgdbactuliem.edu.vn/ckfinder/userfiles/files/make-your-own-minecraft-server-free_GM479516143.pdf
- http://thcsducthang.pgdbactuliem.edu.vn/ckfinder/userfiles/files/coins-master-hack_GM406889139.pdf
- http://thcsducthang.pgdbactuliem.edu.vn/ckfinder/userfiles/files/online-coin-master-free-spin-app_GM406889139.pdf
- http://thcsducthang.pgdbactuliem.edu.vn/ckfinder/userfiles/files/free-coins-for-coin-master_GM406889139.pdf
- http://thcsducthang.pgdbactuliem.edu.vn/ckfinder/userfiles/files/how-to-get-free-spins-grom-coin-master_GM406889139.pdf
- http://thcsducthang.pgdbactuliem.edu.vn/ckfinder/userfiles/files/coin-master-hack-programers_GM406889139.pdf
- http://thcsducthang.pgdbactuliem.edu.vn/ckfinder/userfiles/files/easy-robux-generator_GM431946152.pdf
- http://thcsducthang.pgdbactuliem.edu.vn/ckfinder/userfiles/files/free-card-collection-in-coin-master_GM406889139.pdf
- http://thcsducthang.pgdbactuliem.edu.vn/ckfinder/userfiles/files/sites-for-free-spins-for-coin-master_GM406889139.pdf
- http://thcsducthang.pgdbactuliem.edu.vn/ckfinder/userfiles/files/free-robux-generator-no-human-verification_GM431946152.pdf
- http://thcsducthang.pgdbactuliem.edu.vn/ckfinder/userfiles/files/how-do-u-hack-roblox_GM431946152.pdf
- http://thcsducthang.pgdbactuliem.edu.vn/ckfinder/userfiles/files/get-coin-master-spins-free_GM406889139.pdf
- http://thcsducthang.pgdbactuliem.edu.vn/ckfinder/userfiles/files/universal-minecraft-converter-free_GM479516143.pdf
- http://thcsducthang.pgdbactuliem.edu.vn/ckfinder/userfiles/files/how-to-get-free-robux-easy-2021_GM431946152.pdf
- http://thcsducthang.pgdbactuliem.edu.vn/ckfinder/userfiles/files/how-to-hack-a-minecraft-server-and-make-yourself-op_GM479516143.pdf
- http://thcsducthang.pgdbactuliem.edu.vn/ckfinder/userfiles/files/can-i-get-free-robux_GM431946152.pdf
- http://thcsducthang.pgdbactuliem.edu.vn/ckfinder/userfiles/files/how-to-get-free-robux-no-verification_GM431946152.pdf
- http://thcsducthang.pgdbactuliem.edu.vn/ckfinder/userfiles/files/free-spins-coin-master-app_GM406889139.pdf
- http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off00004bb8.bin` `68baa233f37c7ac19a2db280e658d45e74d4cef6a31207e37f6f5568712055d3`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x4BB8	28052 bytes
`font_01_sfnt_off00008a51.bin` `a7a69a356750c58f853193ac64834dcf3e4080fc2a8f6e9107645a696c81e11e`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x8A51	5756 bytes
`font_02_sfnt_off000097a2.bin` `ef1b78a66279658933fe2b8668a06e9e8330ca7c94d89169a06b9c8d822bf7c7`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x97A2	18364 bytes

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