Malicious PDF — malware analysis report

Static analysis result for SHA-256 982def2f23266139…

MALICIOUS

PDF

35.0 KB Created: 2021-07-01 17:24:12 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 733222a927e828b767dfdc2abd16feae SHA-1: 3ea5bff9962b8d4bd8159556c1010132f5068ea5 SHA-256: 982def2f232661395977e30b8561abd144e2e102b92a9791039bbfe087302778
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous external links, many of which are presented as download opportunities for game cheats and in-game currency. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of such links, and the ML classifier strongly suggests maliciousness. The primary IOC is the URL http://netcdn.co/app/431946152/roblox-boxing-sim-hacks-game-hack, which likely hosts a secondary payload.

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-boxing-sim-hacks-game-hack
    • https://penanggulanganbencana.denpasarkota.go.id/new/public/ckfinder/userfiles/files/how-to-get-any-shirt-for-free-roblox-2021_GM431946152.pdf
    • https://penanggulanganbencana.denpasarkota.go.id/new/public/ckfinder/userfiles/files/free-robux-generator-no-human-verification-or-survey-2021_GM431946152.pdf
    • https://penanggulanganbencana.denpasarkota.go.id/new/public/ckfinder/userfiles/files/coin-master-free-spins-2021_GM406889139.pdf
    • https://penanggulanganbencana.denpasarkota.go.id/new/public/ckfinder/userfiles/files/free-robux-no-offers_GM431946152.pdf
    • https://penanggulanganbencana.denpasarkota.go.id/new/public/ckfinder/userfiles/files/coin-master-level-3_GM406889139.pdf
    • https://penanggulanganbencana.denpasarkota.go.id/new/public/ckfinder/userfiles/files/coin-master-free-spins-and-coins-2021_GM406889139.pdf
    • https://penanggulanganbencana.denpasarkota.go.id/new/public/ckfinder/userfiles/files/coin-master-free-spin-link-today-2021_GM406889139.pdf
    • https://penanggulanganbencana.denpasarkota.go.id/new/public/ckfinder/userfiles/files/www-roblox-com-free-robux_GM431946152.pdf
    • https://penanggulanganbencana.denpasarkota.go.id/new/public/ckfinder/userfiles/files/coin-master-free-stuff-links_GM406889139.pdf
    • https://penanggulanganbencana.denpasarkota.go.id/new/public/ckfinder/userfiles/files/free-points-for-robux_GM431946152.pdf
    • https://penanggulanganbencana.denpasarkota.go.id/new/public/ckfinder/userfiles/files/coun-master_GM406889139.pdf
    • https://penanggulanganbencana.denpasarkota.go.id/new/public/ckfinder/userfiles/files/coin-master-spin-hack-2021_GM406889139.pdf
    • https://penanggulanganbencana.denpasarkota.go.id/new/public/ckfinder/userfiles/files/how-do-you-get-free-food-on-coin-master_GM406889139.pdf
    • https://penanggulanganbencana.denpasarkota.go.id/new/public/ckfinder/userfiles/files/minecraft-for-free-on-phone_GM479516143.pdf
    • https://penanggulanganbencana.denpasarkota.go.id/new/public/ckfinder/userfiles/files/apps-that-give-you-free-robux_GM431946152.pdf
    • https://penanggulanganbencana.denpasarkota.go.id/new/public/ckfinder/userfiles/files/how-to-get-free-robux-without-human-verification-2021_GM431946152.pdf
    • https://penanggulanganbencana.denpasarkota.go.id/new/public/ckfinder/userfiles/files/slurp-hack-roblox-counter-blox_GM431946152.pdf
    • https://penanggulanganbencana.denpasarkota.go.id/new/public/ckfinder/userfiles/files/how-to-get-free-cards-sets-for-coin-master_GM406889139.pdf
    • https://penanggulanganbencana.denpasarkota.go.id/new/public/ckfinder/userfiles/files/free-spins-and-coins-coin-master-2021_GM406889139.pdf
    • https://penanggulanganbencana.denpasarkota.go.id/new/public/ckfinder/userfiles/files/coin-master-hack-app-android-download_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000032f8.bin
8f812382de0e6de1226b17c747f047c55dab3acbb20098b8940b4699ee13bba6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x32F8 22052 bytes
font_01_sfnt_off000063f7.bin
c4cc215d402473f003f1b7c2f048697f1d122e1f43ec9cfb0c0de0b67af5a097		 pdf-font-stream PDF embedded font (sfnt) at offset 0x63F7 19036 bytes

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