Malicious PDF — malware analysis report

Static analysis result for SHA-256 5db77e5462e20f31…

MALICIOUS

PDF

25.9 KB Created: 2021-07-04 10:35:18 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 17582da0923f58d6197eaad865a337ff SHA-1: 79910989f7118cdea1762b022aaaa6d0e71e55c7 SHA-256: 5db77e5462e20f3133c5dfd78d3a09afb35e296f92cd3b2b055ede2fdb1cb4ab
94 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous links to external websites, many of which are hosted on compromised domains and appear to be part of a link farm designed to attract users searching for game cheats and free in-game items. The ML classifier strongly indicated maliciousness, and the PDF structure suggests it's intended to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

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.tw/app/479516143/are-minecraft-realms-free-game-hack
    • http://www.thalanghospital.go.th/UserFiles/File/free-robux-today_GM431946152.pdf
    • http://www.thalanghospital.go.th/UserFiles/File/how-to-hack-in-roblox-prison-life_GM431946152.pdf
    • http://www.thalanghospital.go.th/UserFiles/File/how-to-get-hacks-on-minecraft_GM479516143.pdf
    • http://www.thalanghospital.go.th/UserFiles/File/how-to-hack-jailbreak-roblox-noclip_GM431946152.pdf
    • http://www.thalanghospital.go.th/UserFiles/File/how-to-get-free-gamepass-in-roblox_GM431946152.pdf
    • http://www.thalanghospital.go.th/UserFiles/File/how-to-get-free-robux-no-verification_GM431946152.pdf
    • http://www.thalanghospital.go.th/UserFiles/File/coin-master-app-for-free-spins_GM406889139.pdf
    • http://www.thalanghospital.go.th/UserFiles/File/how-to-make-a-roblox-group-for-free_GM431946152.pdf
    • http://www.thalanghospital.go.th/UserFiles/File/free-private-roblox-server_GM431946152.pdf
    • http://www.thalanghospital.go.th/UserFiles/File/earn-free-robux-for-roblox_GM431946152.pdf
    • http://www.thalanghospital.go.th/UserFiles/File/roblox-free-robux-wivout-paying_GM431946152.pdf
    • http://www.thalanghospital.go.th/UserFiles/File/coin-master-free-daily-spins-today_GM406889139.pdf
    • http://www.thalanghospital.go.th/UserFiles/File/free-roblox-accounts-dantdm_GM431946152.pdf
    • http://www.thalanghospital.go.th/UserFiles/File/roblox-how-to-get-shirt-for-free_GM431946152.pdf
    • http://www.thalanghospital.go.th/UserFiles/File/how-to-get-free-robux-pc-2021_GM431946152.pdf
    • http://www.thalanghospital.go.th/UserFiles/File/coin-master-free-spin-link-today-50_GM406889139.pdf
    • http://www.thalanghospital.go.th/UserFiles/File/how-to-get-free-robux-on-roblox_GM431946152.pdf
    • http://www.thalanghospital.go.th/UserFiles/File/coin-master-free-coins-link-2021_GM406889139.pdf
    • http://www.thalanghospital.go.th/UserFiles/File/live-free-robux-codes_GM431946152.pdf
    • http://www.thalanghospital.go.th/UserFiles/File/roblox-shinobi-life-max-hack-2021_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000034bd.bin
4b0e6f59fb1ae4f0b76d0e05e2b3a4ef19f48139364b8b424da40b309ac0f24f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x34BD 22664 bytes

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