Malicious PDF — malware analysis report

Static analysis result for SHA-256 49242432fe30fb10…

MALICIOUS

PDF

36.0 KB Created: 2021-07-05 09:33:56 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 541fa19f361abfb6c614975422cfa28f SHA-1: e533dbcd38de5d1ba49ba8bf531f7709df992378 SHA-256: 49242432fe30fb1037c9c3cc29790bc77fa2d62d75f1e12fafbfb6330bef6d53
102 Risk Score

Malware Insights

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

The PDF document contains numerous links to external resources, many of which are presented as download opportunities for game-related hacks and cheats. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external links, suggesting a link farm designed to attract users. The ML classifier also flagged this PDF as malicious with high confidence.

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/free-coin-spin-daily-link-for-coin-master-game-game-hack
    • http://bkd.padanglawasutarakab.go.id/asset/ckfinder/ckfinder/userfiles/files/coin-master-hack-tool-pc_GM406889139.pdf
    • http://bkd.padanglawasutarakab.go.id/asset/ckfinder/ckfinder/userfiles/files/coin-master-daily-free-spins_GM406889139.pdf
    • http://bkd.padanglawasutarakab.go.id/asset/ckfinder/ckfinder/userfiles/files/free-free-robux_GM431946152.pdf
    • http://bkd.padanglawasutarakab.go.id/asset/ckfinder/ckfinder/userfiles/files/legit-coin-master-hack-no-human-verification_GM406889139.pdf
    • http://bkd.padanglawasutarakab.go.id/asset/ckfinder/ckfinder/userfiles/files/free-spins-on-coin-master_GM406889139.pdf
    • http://bkd.padanglawasutarakab.go.id/asset/ckfinder/ckfinder/userfiles/files/coin-master-hack-app-2021_GM406889139.pdf
    • http://bkd.padanglawasutarakab.go.id/asset/ckfinder/ckfinder/userfiles/files/free-roblox-generator-for-roblox_GM431946152.pdf
    • http://bkd.padanglawasutarakab.go.id/asset/ckfinder/ckfinder/userfiles/files/free-roblox-script-executor_GM431946152.pdf
    • http://bkd.padanglawasutarakab.go.id/asset/ckfinder/ckfinder/userfiles/files/blox-fun-info_GM431946152.pdf
    • http://bkd.padanglawasutarakab.go.id/asset/ckfinder/ckfinder/userfiles/files/minecraft-esp_GM479516143.pdf
    • http://bkd.padanglawasutarakab.go.id/asset/ckfinder/ckfinder/userfiles/files/free-spin-coin-master-link-2021_GM406889139.pdf
    • http://bkd.padanglawasutarakab.go.id/asset/ckfinder/ckfinder/userfiles/files/minecraft-java-free-trial_GM479516143.pdf
    • http://bkd.padanglawasutarakab.go.id/asset/ckfinder/ckfinder/userfiles/files/coin-master-official-fan-page_GM406889139.pdf
    • http://bkd.padanglawasutarakab.go.id/asset/ckfinder/ckfinder/userfiles/files/moonactive-coin-master-free-spins_GM406889139.pdf
    • http://bkd.padanglawasutarakab.go.id/asset/ckfinder/ckfinder/userfiles/files/free-spin-link-for-coin-master-game_GM406889139.pdf
    • http://bkd.padanglawasutarakab.go.id/asset/ckfinder/ckfinder/userfiles/files/moonactive-free-spins-2021_GM406889139.pdf
    • http://bkd.padanglawasutarakab.go.id/asset/ckfinder/ckfinder/userfiles/files/how-to-hack-roblox-to-get-free-robux_GM431946152.pdf
    • http://bkd.padanglawasutarakab.go.id/asset/ckfinder/ckfinder/userfiles/files/free-robux-no-downloading-apps_GM431946152.pdf
    • http://bkd.padanglawasutarakab.go.id/asset/ckfinder/ckfinder/userfiles/files/how-do-you-get-free-food-on-coin-master_GM406889139.pdf
    • http://bkd.padanglawasutarakab.go.id/asset/ckfinder/ckfinder/userfiles/files/coin-master-free-spins-and-coins_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000033cd.bin
a3da78d8861073b228c818609b28a7354602192d6e7ff526c3ace06860ed2da4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x33CD 23136 bytes
font_01_sfnt_off00006806.bin
678a51f2e8ef828bed12fc55a54a37e776a9dd8c7c59b7b89d90e68d245a3f24		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6806 19024 bytes

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