Malicious PDF — malware analysis report

Static analysis result for SHA-256 475f31ce25b87cb8…

MALICIOUS

PDF

36.5 KB Created: 2021-06-20 00:24:38 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 59a85df41717a9fbeb2d48ba9f92712f SHA-1: b861cbc855df4a168f52455742f7f1799ccd3e5a SHA-256: 475f31ce25b87cb8c4843d406fba6af2bd8aa52b2123ff2b2cd2f3e33591a245
62 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The document contains a lure related to obtaining free in-game currency, directing the user to a suspicious URL. The ML classifier strongly flagged this PDF as malicious, and the presence of embedded URLs further supports a malicious intent to redirect the user to a download site. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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/how-to-make-your-own-game-whith-free-robux-game-hack
    • https://puslitbang.kejaksaan.go.id/new/public/ckfinder/userfiles/files/coin-master-free-spins-link-2021-no-verification_GM406889139.pdf
    • https://puslitbang.kejaksaan.go.id/new/public/ckfinder/userfiles/files/coin-master-free-link-2021_GM406889139.pdf
    • https://puslitbang.kejaksaan.go.id/new/public/ckfinder/userfiles/files/114-4-hacks_GM479516143.pdf
    • https://puslitbang.kejaksaan.go.id/new/public/ckfinder/userfiles/files/minecraft-font-free_GM479516143.pdf
    • https://puslitbang.kejaksaan.go.id/new/public/ckfinder/userfiles/files/free-100-robux_GM431946152.pdf
    • https://puslitbang.kejaksaan.go.id/new/public/ckfinder/userfiles/files/free-robux-real_GM431946152.pdf
    • https://puslitbang.kejaksaan.go.id/new/public/ckfinder/userfiles/files/coin-master-free-fire_GM406889139.pdf
    • https://puslitbang.kejaksaan.go.id/new/public/ckfinder/userfiles/files/robux-app_GM431946152.pdf
    • https://puslitbang.kejaksaan.go.id/new/public/ckfinder/userfiles/files/robux-free-c_GM431946152.pdf
    • https://puslitbang.kejaksaan.go.id/new/public/ckfinder/userfiles/files/how-to-play-roblox-for-free_GM431946152.pdf
    • https://puslitbang.kejaksaan.go.id/new/public/ckfinder/userfiles/files/how-to-get-free-minecraft-skins_GM479516143.pdf
    • https://puslitbang.kejaksaan.go.id/new/public/ckfinder/userfiles/files/free-tiktok-bots_GM835599320.pdf
    • https://puslitbang.kejaksaan.go.id/new/public/ckfinder/userfiles/files/how-to-hack-roblox-accounts-on-phone_GM431946152.pdf
    • https://puslitbang.kejaksaan.go.id/new/public/ckfinder/userfiles/files/how-to-get-tiktok-famous-free_GM835599320.pdf
    • https://puslitbang.kejaksaan.go.id/new/public/ckfinder/userfiles/files/free-spins-coin-master-november-2021_GM406889139.pdf
    • https://puslitbang.kejaksaan.go.id/new/public/ckfinder/userfiles/files/como-tener-400-robux-gratis-sin-hack_GM431946152.pdf
    • https://puslitbang.kejaksaan.go.id/new/public/ckfinder/userfiles/files/free-robux-for-kids_GM431946152.pdf
    • https://puslitbang.kejaksaan.go.id/new/public/ckfinder/userfiles/files/can-i-hack-uc-in-pubg_GM1330123889.pdf
    • https://puslitbang.kejaksaan.go.id/new/public/ckfinder/userfiles/files/roblox-hats-for-free_GM431946152.pdf
    • https://puslitbang.kejaksaan.go.id/new/public/ckfinder/userfiles/files/coin-master-free-spins-link-facebook_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off000031b1.bin
b64978a32b8ca32e4c73d862bea85f99a511ec38648e864466b2b0815751b287		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x31B1 23444 bytes
font_01_sfnt_off0000667a.bin
8cbf1b2adc29df99cbc125a2a8e99ed92c4bbdf52008475ac5bf40854ecccfb0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x667A 20256 bytes

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