Malicious PDF — malware analysis report

Static analysis result for SHA-256 0670c0d0825f0606…

MALICIOUS

PDF

35.3 KB Created: 2021-06-28 01:21:56 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 7de3e41e09be2b368d80b43d5577f20d SHA-1: 6ca3d3d4a7ae14c9d1b45c7a4cab88ed45f56d25 SHA-256: 0670c0d0825f060665a9478e29863ac0e111b87fc01561b5b706e4927a0ed779
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document contains numerous embedded URLs and a link farm, many of which point to resources related to game hacks and cheats, such as Roblox and Coin Master. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external links, and the ML classifier strongly suggests maliciousness. The document body, though partially corrupted, contains references to 'Red Boy Hack Roblox' and a URL that likely serves as a download or redirect for a malicious 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/red-boy-hack-roblox-descargar-game-hack
    • https://kpu-tabanankab.go.id/new/public/ckfinder/userfiles/files/free-robux-real-2021_GM431946152.pdf
    • https://kpu-tabanankab.go.id/new/public/ckfinder/userfiles/files/how-to-get-free-coins-in-coin-master_GM406889139.pdf
    • https://kpu-tabanankab.go.id/new/public/ckfinder/userfiles/files/i-need-more-free-spins-on-coin-master_GM406889139.pdf
    • https://kpu-tabanankab.go.id/new/public/ckfinder/userfiles/files/coin-master-daily-free-spin-app_GM406889139.pdf
    • https://kpu-tabanankab.go.id/new/public/ckfinder/userfiles/files/how-to-hack-roblox-to-get-robux_GM431946152.pdf
    • https://kpu-tabanankab.go.id/new/public/ckfinder/userfiles/files/free-spins-and-coins-coin-master_GM406889139.pdf
    • https://kpu-tabanankab.go.id/new/public/ckfinder/userfiles/files/free-robux-hack-generator_GM431946152.pdf
    • https://kpu-tabanankab.go.id/new/public/ckfinder/userfiles/files/how-to-get-free-food-for-foxy-in-coin-master_GM406889139.pdf
    • https://kpu-tabanankab.go.id/new/public/ckfinder/userfiles/files/how-to-make-a-minecraft-pe-server-for-free_GM479516143.pdf
    • https://kpu-tabanankab.go.id/new/public/ckfinder/userfiles/files/buy-roblox-cheats_GM431946152.pdf
    • https://kpu-tabanankab.go.id/new/public/ckfinder/userfiles/files/roblox-free-body_GM431946152.pdf
    • https://kpu-tabanankab.go.id/new/public/ckfinder/userfiles/files/coin-master-free-coin-and-spin-app_GM406889139.pdf
    • https://kpu-tabanankab.go.id/new/public/ckfinder/userfiles/files/blogspot-coin-master-free-spins_GM406889139.pdf
    • https://kpu-tabanankab.go.id/new/public/ckfinder/userfiles/files/roblox-cheat-enginefly-hack_GM431946152.pdf
    • https://kpu-tabanankab.go.id/new/public/ckfinder/userfiles/files/free-coin-master-gifts_GM406889139.pdf
    • https://kpu-tabanankab.go.id/new/public/ckfinder/userfiles/files/coin-master-free-spins-link-today-new-2021_GM406889139.pdf
    • https://kpu-tabanankab.go.id/new/public/ckfinder/userfiles/files/coin-master-hack-apk-android_GM406889139.pdf
    • https://kpu-tabanankab.go.id/new/public/ckfinder/userfiles/files/robux-win_GM431946152.pdf
    • https://kpu-tabanankab.go.id/new/public/ckfinder/userfiles/files/roblox-speed-hack-2021-code_GM431946152.pdf
    • https://kpu-tabanankab.go.id/new/public/ckfinder/userfiles/files/coin-master-free-spins--spins_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000031cd.bin
09c364d0b559feaae726ec350f9b12cd0f77b19a2e706b90d9b09f59860c9cb5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x31CD 22492 bytes
font_01_sfnt_off0000644c.bin
c1880053735bd14e2edbd5bb55228b9324a0c24ee92daa677fcfffde42e03d46		 pdf-font-stream PDF embedded font (sfnt) at offset 0x644C 19176 bytes

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