Malicious PDF — malware analysis report

Static analysis result for SHA-256 f4c2b1b2c2c81299…

MALICIOUS

PDF

34.1 KB Created: 2021-06-29 08:42:30 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 428613a70ae17366f91cf2e8f18ba912 SHA-1: 7498c5a20434c7e3fc44542a19f541cfe4f5e63d SHA-256: f4c2b1b2c2c81299ff11f6b6379b9b80973228b117559fe376ef18289537ac69
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF document contains numerous embedded links, identified as a link farm, that direct users to external websites. The document body and extracted URLs suggest a lure related to free game items and cheats for popular games like Roblox and Coin Master. The ML classifier strongly indicates malicious intent, likely to lead users to phishing sites or download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 http://netcdn.co/app/431946152/hoe-to-get-a-vip-server-in-roblox-for-free-game-hack
    • http://opac.disarpus.surakarta.go.id/repository/coin-master-free-coins-no-human-verification_GM406889139.pdf
    • http://opac.disarpus.surakarta.go.id/repository/live-roblox-bubble-gum-simulator-hack_GM431946152.pdf
    • http://opac.disarpus.surakarta.go.id/repository/how-to-get-minecraft-for-free-on-phone_GM479516143.pdf
    • http://opac.disarpus.surakarta.go.id/repository/coin-master-daily-free-spins-haktuts_GM406889139.pdf
    • http://opac.disarpus.surakarta.go.id/repository/free-robux-no-human-verification-and-no-survey-2021_GM431946152.pdf
    • http://opac.disarpus.surakarta.go.id/repository/basic-roblox-lua-programming-pdf-free_GM431946152.pdf
    • http://opac.disarpus.surakarta.go.id/repository/coin-master-hacks-and-cheats_GM406889139.pdf
    • http://opac.disarpus.surakarta.go.id/repository/new-code-speed-hack-roblox_GM431946152.pdf
    • http://opac.disarpus.surakarta.go.id/repository/robloxgiveaways-top-hack-robux_GM431946152.pdf
    • http://opac.disarpus.surakarta.go.id/repository/how-to-get-hacks-on-roblox_GM431946152.pdf
    • http://opac.disarpus.surakarta.go.id/repository/free-robux-scams_GM431946152.pdf
    • http://opac.disarpus.surakarta.go.id/repository/free-robux-please_GM431946152.pdf
    • http://opac.disarpus.surakarta.go.id/repository/rbx-free-robux_GM431946152.pdf
    • http://opac.disarpus.surakarta.go.id/repository/cheat-codes-for-tuber-simulator-roblox_GM431946152.pdf
    • http://opac.disarpus.surakarta.go.id/repository/roblox-rpg-hack_GM431946152.pdf
    • http://opac.disarpus.surakarta.go.id/repository/free-robux-promo-codes-real_GM431946152.pdf
    • http://opac.disarpus.surakarta.go.id/repository/hack-proxo-roblox_GM431946152.pdf
    • http://opac.disarpus.surakarta.go.id/repository/free-roblox-accounts-2021-march_GM431946152.pdf
    • http://opac.disarpus.surakarta.go.id/repository/how-to-get-hacks-on-minecraft_GM479516143.pdf
    • http://opac.disarpus.surakarta.go.id/repository/nonsense-diamond-roblox-hack-download_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002eb3.bin
7c7a1f57755e0760af5e23adacc17338a8aa73ba14777f827eeef5d64a5e95dc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2EB3 21864 bytes
font_01_sfnt_off00005f52.bin
e59dd6e32aecbb41b580ad0cbf707a3334e2bc46784c4361ca7b5a5eb138f690		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5F52 19296 bytes

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