Malicious PDF — malware analysis report

Static analysis result for SHA-256 a8a9417dc9286582…

MALICIOUS

PDF

33.9 KB Created: 2021-06-29 01:04:09 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: ff439135deedc06536ec965fb01a9f7f SHA-1: e37ca181594f9ef6b468a80ec5f3f8e5fe0ee953 SHA-256: a8a9417dc9286582f433a7873b726868bfc115b07108372520b006e4edc69fe9
94 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains numerous links to external websites, many of which are SEO-optimized pages promising game hacks and free currency for popular games like Roblox. The ML classifier strongly indicates maliciousness, and the PDF_SEO_LINK_FARM heuristic confirms a large number of external links, suggesting a phishing or malware distribution scheme. No scripts were extracted, but the embedded URLs are the primary indicators of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

Heuristics 3

  • 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.
  • 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.co/app/431946152/roblox-jump-hack-game-hack
    • http://library.fk.upnvj.ac.id/repository/how-to-get-free-robux-glitch-2021-august_GM431946152.pdf
    • http://library.fk.upnvj.ac.id/repository/roblox-mod-apk-free-robux-2385202134_GM431946152.pdf
    • http://library.fk.upnvj.ac.id/repository/how-to-use-no-clip-hacks-roblox-2021-novenmber_GM431946152.pdf
    • http://library.fk.upnvj.ac.id/repository/free-robux-no-verification-2021_GM431946152.pdf
    • http://library.fk.upnvj.ac.id/repository/descargar-hacks-para-roblox_GM431946152.pdf
    • http://library.fk.upnvj.ac.id/repository/hacks-for-roblox-prison-life_GM431946152.pdf
    • http://library.fk.upnvj.ac.id/repository/how-to-create-a-vip-server-on-roblox-for-free_GM431946152.pdf
    • http://library.fk.upnvj.ac.id/repository/how-to-get-free-spins-in-coin-master_GM406889139.pdf
    • http://library.fk.upnvj.ac.id/repository/free-robux-generator-2021_GM431946152.pdf
    • http://library.fk.upnvj.ac.id/repository/hide-and-seek-extreme-roblox-hack_GM431946152.pdf
    • http://library.fk.upnvj.ac.id/repository/how-to-get-free-robux-without-verification-or-surveys_GM431946152.pdf
    • http://library.fk.upnvj.ac.id/repository/free-spin-coin-master-hack-2021_GM406889139.pdf
    • http://library.fk.upnvj.ac.id/repository/free-roblox-accounts-with-obc_GM431946152.pdf
    • http://library.fk.upnvj.ac.id/repository/coin-master-hack-without-human-verification-2021_GM406889139.pdf
    • http://library.fk.upnvj.ac.id/repository/bee-swarm-simulator-gifted-cheat-roblox_GM431946152.pdf
    • http://library.fk.upnvj.ac.id/repository/get-free-spins-coin-master_GM406889139.pdf
    • http://library.fk.upnvj.ac.id/repository/how-to-get-free-knives-in-assassin-roblox-2021_GM431946152.pdf
    • http://library.fk.upnvj.ac.id/repository/appsmobinfo-coinmasterhack-coin-master-hack_GM406889139.pdf
    • http://library.fk.upnvj.ac.id/repository/free-toy-codes-roblox-2021_GM431946152.pdf
    • http://library.fk.upnvj.ac.id/repository/hire-a-hacker-for-roblox_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000336d.bin
a726b2633f7bbaca0c1eb23f80a23c281927527585e7b27dc6be6dec88d2b945		 pdf-font-stream PDF embedded font (sfnt) at offset 0x336D 23356 bytes
font_01_sfnt_off00006849.bin
6f4f65dad37ba252db4e9ddee57d1d6a9583c06dff4607c1e4c7c958416d9538		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6849 19400 bytes

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