Malicious PDF — malware analysis report

Static analysis result for SHA-256 8ea4c69ace3187f6…

MALICIOUS

PDF

35.4 KB Created: 2021-07-05 15:04:33 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 4ae86cd9dededad164f68df88af0face SHA-1: 2501993a8916024951423c0cb3c08c9178e84c08 SHA-256: 8ea4c69ace3187f66a06ec8376caf59890e5b3751fd37c0291217474788d05e4
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains numerous embedded links and a link farm, heavily promoting "hacks" and "free items" for popular games. The primary URL, http://netcdn.tw/app/406889139/coin-master-spins-hack-2021-game-hack, likely serves as a landing page for malicious content or further downloads. The ML classifier strongly indicated maliciousness, supporting the conclusion that this document is part of a phishing or malware distribution campaign.

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/406889139/coin-master-spins-hack-2021-game-hack
    • https://www.dikes.badungkab.go.id/new/public/ckfinder/userfiles/files/coin-master-free-cards-link-2021_GM406889139.pdf
    • https://www.dikes.badungkab.go.id/new/public/ckfinder/userfiles/files/free-script-codes-for-roblox-script-showcase_GM431946152.pdf
    • https://www.dikes.badungkab.go.id/new/public/ckfinder/userfiles/files/code-roblox-card-free-robux_GM431946152.pdf
    • https://www.dikes.badungkab.go.id/new/public/ckfinder/userfiles/files/coin-master-free-daily-spins-2021_GM406889139.pdf
    • https://www.dikes.badungkab.go.id/new/public/ckfinder/userfiles/files/how-to-get-free-robux-2021_GM431946152.pdf
    • https://www.dikes.badungkab.go.id/new/public/ckfinder/userfiles/files/roblox-how-to-get-free-obc-2021_GM431946152.pdf
    • https://www.dikes.badungkab.go.id/new/public/ckfinder/userfiles/files/how-to-get-free-robux-no-inspect-element-no-wait_GM431946152.pdf
    • https://www.dikes.badungkab.go.id/new/public/ckfinder/userfiles/files/free-robux-promo-codes-2021_GM431946152.pdf
    • https://www.dikes.badungkab.go.id/new/public/ckfinder/userfiles/files/coin-master-hack-game-download-mod-apk_GM406889139.pdf
    • https://www.dikes.badungkab.go.id/new/public/ckfinder/userfiles/files/coin-master-redeem-code-free_GM406889139.pdf
    • https://www.dikes.badungkab.go.id/new/public/ckfinder/userfiles/files/how-to-get-free-robux-games_GM431946152.pdf
    • https://www.dikes.badungkab.go.id/new/public/ckfinder/userfiles/files/free-roblox-blue-hats_GM431946152.pdf
    • https://www.dikes.badungkab.go.id/new/public/ckfinder/userfiles/files/free-gold-cards-coin-master_GM406889139.pdf
    • https://www.dikes.badungkab.go.id/new/public/ckfinder/userfiles/files/hack-para-las-contraseas-de-roblox_GM431946152.pdf
    • https://www.dikes.badungkab.go.id/new/public/ckfinder/userfiles/files/hack-roblox-players_GM431946152.pdf
    • https://www.dikes.badungkab.go.id/new/public/ckfinder/userfiles/files/how-to-play-minecraft-for-free-on-pc_GM479516143.pdf
    • https://www.dikes.badungkab.go.id/new/public/ckfinder/userfiles/files/need-free-spins-for-coin-master_GM406889139.pdf
    • https://www.dikes.badungkab.go.id/new/public/ckfinder/userfiles/files/how-to-get-minecraft-windows-10-edition-for-free_GM479516143.pdf
    • https://www.dikes.badungkab.go.id/new/public/ckfinder/userfiles/files/free-minecraft-server-maker_GM479516143.pdf
    • https://www.dikes.badungkab.go.id/new/public/ckfinder/userfiles/files/roblox-the-rake-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_off000035ac.bin
373a43e77e40111943fb32ac8e2cfb26fb97282edab73fab3e08883a29e26d28		 pdf-font-stream PDF embedded font (sfnt) at offset 0x35AC 22156 bytes
font_01_sfnt_off0000668e.bin
63d6adc7563b485c3174704ac8a7a6a262dc9bf1deaf17837918a23c7f43ebb5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x668E 18580 bytes

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