Malicious PDF — malware analysis report

Static analysis result for SHA-256 5c809abf83f2204a…

MALICIOUS

PDF

45.8 KB Created: 2021-06-08 16:16:34 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 9f1daf47f68bd5f7c176dd6e8d6fbc32 SHA-1: 95112576a2ca2579a5eba6aaac3cb86231b54a8c SHA-256: 5c809abf83f2204af594676b2f785a5f73ae765c11fe91f9b6df94f4827dbb63
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded links and a "doc body" that explicitly mentions "Hack De Roblox" and provides URLs related to game cheats and free currency. The PDF_SEO_LINK_FARM heuristic indicates a large number of external links, suggesting a link farm designed to drive traffic to potentially malicious sites. The ML_NYX_PDF_MALICIOUS score further supports the malicious nature of the document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9864

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 https://netcdn.tw/app/431946152/hack-de-roblox-2021-jailbreak-game-hack
    • https://kpu-tabanankab.go.id/new/public/ckfinder/userfiles/files/free-robux-generator-no-survey-no-download-no-human-verification_GM431946152.pdf
    • https://kpu-tabanankab.go.id/new/public/ckfinder/userfiles/files/free-roblox-gift-card-codes_GM431946152.pdf
    • https://kpu-tabanankab.go.id/new/public/ckfinder/userfiles/files/coin-master-daily-free-spins-link-app_GM406889139.pdf
    • https://kpu-tabanankab.go.id/new/public/ckfinder/userfiles/files/bloxpink-free-robux_GM431946152.pdf
    • https://kpu-tabanankab.go.id/new/public/ckfinder/userfiles/files/free-robux-by-watching-ads_GM431946152.pdf
    • https://kpu-tabanankab.go.id/new/public/ckfinder/userfiles/files/coin-master-unlimited-spin-and-coin-hack_GM406889139.pdf
    • https://kpu-tabanankab.go.id/new/public/ckfinder/userfiles/files/get-free-robux-today_GM431946152.pdf
    • https://kpu-tabanankab.go.id/new/public/ckfinder/userfiles/files/how-to-get-roebucks-on-roblox_GM431946152.pdf
    • https://kpu-tabanankab.go.id/new/public/ckfinder/userfiles/files/blogspot-coin-master-spins_GM406889139.pdf
    • https://kpu-tabanankab.go.id/new/public/ckfinder/userfiles/files/daily-free-spin-and-coin_GM406889139.pdf
    • https://kpu-tabanankab.go.id/new/public/ckfinder/userfiles/files/adopt-me-roblox-hacks_GM431946152.pdf
    • https://kpu-tabanankab.go.id/new/public/ckfinder/userfiles/files/free-robux-generator-without-human-verification_GM431946152.pdf
    • https://kpu-tabanankab.go.id/new/public/ckfinder/userfiles/files/how-to-get-minecraft-coins-for-free_GM479516143.pdf
    • https://kpu-tabanankab.go.id/new/public/ckfinder/userfiles/files/how-to-get-hacks-on-roblox_GM431946152.pdf
    • https://kpu-tabanankab.go.id/new/public/ckfinder/userfiles/files/coin-master-hack-without-human-verification-2021_GM406889139.pdf
    • https://kpu-tabanankab.go.id/new/public/ckfinder/userfiles/files/get-free-spins-for-coin-master_GM406889139.pdf
    • https://kpu-tabanankab.go.id/new/public/ckfinder/userfiles/files/coin-master-cheat-apk-free-download_GM406889139.pdf
    • https://kpu-tabanankab.go.id/new/public/ckfinder/userfiles/files/coin-master-free-spins-link-download_GM406889139.pdf
    • https://kpu-tabanankab.go.id/new/public/ckfinder/userfiles/files/coin-master-strategy_GM406889139.pdf
    • https://kpu-tabanankab.go.id/new/public/ckfinder/userfiles/files/coin-master-apk-hack-358_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off000055c3.bin
068f6e2b46c5970569f519f2150d08abb0ea79748143de7350e773e1a06c6169		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x55C3 24664 bytes
font_01_sfnt_off00008e01.bin
f1afcc1d47064a917b07aad4310d22ca6a9ba4987b5631c498aa75de7703c1d4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8E01 19040 bytes

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