Malicious PDF — malware analysis report

Static analysis result for SHA-256 0fe608ec11ae06b6…

MALICIOUS

PDF

34.7 KB Created: 2021-07-09 01:50:50 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: c64378b7d0490ee185dc98b010edd118 SHA-1: a9a36c769444b76d6dd5a5ea881f2b1bb2e72b62 SHA-256: 0fe608ec11ae06b6006bcc7f6ad83207efdb51220dc73ef87499b1529e39cc3a
102 Risk Score

Malware Insights

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

The PDF document contains numerous links, including one to 'netcdn.tw', which are presented as download opportunities for game hacks and cheats. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external links, suggesting a tactic to distribute various malicious files. The ML classifier also strongly flagged this PDF as malicious.

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.tw/app/479516143/free-minecraft-skin-creator-game-hack
    • https://pdiperjuanganbali.id/new/public/ckfinder/userfiles/files/coin-master-hack-apk_GM406889139.pdf
    • https://pdiperjuanganbali.id/new/public/ckfinder/userfiles/files/how-to-get-free-robux-hack-script-2021_GM431946152.pdf
    • https://pdiperjuanganbali.id/new/public/ckfinder/userfiles/files/roblox-hack-enginesaa_GM431946152.pdf
    • https://pdiperjuanganbali.id/new/public/ckfinder/userfiles/files/get-free-spins-coin-master-link_GM406889139.pdf
    • https://pdiperjuanganbali.id/new/public/ckfinder/userfiles/files/roblox-hacks-for-mac_GM431946152.pdf
    • https://pdiperjuanganbali.id/new/public/ckfinder/userfiles/files/building-simulator-cheat-codes-roblox_GM431946152.pdf
    • https://pdiperjuanganbali.id/new/public/ckfinder/userfiles/files/www-roblox-com-free-robux_GM431946152.pdf
    • https://pdiperjuanganbali.id/new/public/ckfinder/userfiles/files/minecraft-build-hacks_GM479516143.pdf
    • https://pdiperjuanganbali.id/new/public/ckfinder/userfiles/files/inquisitormaster-how-to-get-free-robux_GM431946152.pdf
    • https://pdiperjuanganbali.id/new/public/ckfinder/userfiles/files/but-link-says-free-robux_GM431946152.pdf
    • https://pdiperjuanganbali.id/new/public/ckfinder/userfiles/files/roblox-how-to-get-free-clothes_GM431946152.pdf
    • https://pdiperjuanganbali.id/new/public/ckfinder/userfiles/files/all-ways-to-use-cheat-engine-in-roblox_GM431946152.pdf
    • https://pdiperjuanganbali.id/new/public/ckfinder/userfiles/files/coin-master-free-spins-and-coins-today-gift-reward_GM406889139.pdf
    • https://pdiperjuanganbali.id/new/public/ckfinder/userfiles/files/free-robux-website-without-human-verification_GM431946152.pdf
    • https://pdiperjuanganbali.id/new/public/ckfinder/userfiles/files/roblox-free-models_GM431946152.pdf
    • https://pdiperjuanganbali.id/new/public/ckfinder/userfiles/files/free-robux-without-doing-anything_GM431946152.pdf
    • https://pdiperjuanganbali.id/new/public/ckfinder/userfiles/files/roblox-play-as-guest-free_GM431946152.pdf
    • https://pdiperjuanganbali.id/new/public/ckfinder/userfiles/files/coin-master-free-link-spin_GM406889139.pdf
    • https://pdiperjuanganbali.id/new/public/ckfinder/userfiles/files/will-minecraft-dungeons-be-free_GM479516143.pdf
    • https://pdiperjuanganbali.id/new/public/ckfinder/userfiles/files/how-to-get-robux-easy_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000032d0.bin
278d74fef75dbfc9c13541dbb9a72996502adba77606bb6946c4e41fd80833eb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x32D0 22676 bytes
font_01_sfnt_off00006551.bin
9704d2ef6cf382abe01f690158c9c7fe359db5d0ef1a7cf91a9fa9ec4740787b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6551 18168 bytes

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