Malicious PDF — malware analysis report

Static analysis result for SHA-256 f5c4f3d2982101bc…

MALICIOUS

PDF

34.6 KB Created: 2021-07-01 13:12:53 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 268aec7dbaa6cac0bbb125ded7b2b247 SHA-1: ebfba975bd8118beede3a8aa13670fb126a74c53 SHA-256: f5c4f3d2982101bc7a388b294e2ab0b2dcce9325894c397d2b6ddb74a0655eff
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 User Execution: Malicious File

The PDF document contains numerous links to external files, many of which are presented as game hacks or cheats, indicating a lure for users to download potentially malicious content. The ML classifier also flagged this PDF as malicious with high confidence. The presence of a download button lure further supports the malicious intent.

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/roblox-dungeon-quest-hack-trainer-game-hack
    • http://hipmibadung.or.id/new/public/ckfinder/userfiles/files/robux-com-free_GM431946152.pdf
    • http://hipmibadung.or.id/new/public/ckfinder/userfiles/files/cheat-big-paintball-roblox_GM431946152.pdf
    • http://hipmibadung.or.id/new/public/ckfinder/userfiles/files/free-robux-no-human-verification-2021_GM431946152.pdf
    • http://hipmibadung.or.id/new/public/ckfinder/userfiles/files/pokemon-go-free-team-medallion_GM1094591345.pdf
    • http://hipmibadung.or.id/new/public/ckfinder/userfiles/files/coin-master-invite-friends-free-spins_GM406889139.pdf
    • http://hipmibadung.or.id/new/public/ckfinder/userfiles/files/free-spin-coin-master-link-2021_GM406889139.pdf
    • http://hipmibadung.or.id/new/public/ckfinder/userfiles/files/free-gear-from-games-roblox_GM431946152.pdf
    • http://hipmibadung.or.id/new/public/ckfinder/userfiles/files/best-free-robwhat-does-roblox-points-do-ox-clothes_GM431946152.pdf
    • http://hipmibadung.or.id/new/public/ckfinder/userfiles/files/robux-hack-2021-no-human-verification-pc_GM431946152.pdf
    • http://hipmibadung.or.id/new/public/ckfinder/userfiles/files/static-moonactive_GM406889139.pdf
    • http://hipmibadung.or.id/new/public/ckfinder/userfiles/files/how-to-get-free-coins-for-coin-master_GM406889139.pdf
    • http://hipmibadung.or.id/new/public/ckfinder/userfiles/files/what-games-give-you-robux_GM431946152.pdf
    • http://hipmibadung.or.id/new/public/ckfinder/userfiles/files/free-robux-that-actually-works-2021_GM431946152.pdf
    • http://hipmibadung.or.id/new/public/ckfinder/userfiles/files/free-robux-please_GM431946152.pdf
    • http://hipmibadung.or.id/new/public/ckfinder/userfiles/files/roblox-star-glitcher-hack_GM431946152.pdf
    • http://hipmibadung.or.id/new/public/ckfinder/userfiles/files/minecraft-pe-server-hosting-free_GM479516143.pdf
    • http://hipmibadung.or.id/new/public/ckfinder/userfiles/files/free-robux-pastebin_GM431946152.pdf
    • http://hipmibadung.or.id/new/public/ckfinder/userfiles/files/roblox-free-robux-codes_GM431946152.pdf
    • http://hipmibadung.or.id/new/public/ckfinder/userfiles/files/coin-master-free-spin-and-coin-links_GM406889139.pdf
    • http://hipmibadung.or.id/new/public/ckfinder/userfiles/files/noto-clip-hacks-roblox-wall-hack_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00003111.bin
390df8be0d93f201212005321c246fa5dd93b3b92aed5d5e69877d573c39eb51		 pdf-font-stream PDF embedded font (sfnt) at offset 0x3111 21820 bytes
font_01_sfnt_off0000611f.bin
9a7e10184eccab5df80643e6af565e51ebffafc25cf535c95bd4e1cf08aa11f1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x611F 19344 bytes

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