Malicious PDF — malware analysis report

Static analysis result for SHA-256 5c2ec25f24489bf9…

MALICIOUS

PDF

34.8 KB Created: 2021-07-06 07:28:21 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 801565125010e6b49bac776d6a8b6f5e SHA-1: 6ce1685487610c1056b219aefc83f1ad5def0e7e SHA-256: 5c2ec25f24489bf9823756329f1a42213a804171e884da78f3d41c0d33126674
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous embedded links and a document body that promotes free in-game currency and hacks for popular games like Roblox. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external links, and the ML classifier strongly suggests maliciousness. The primary attack pattern involves directing users to potentially malicious websites hosted on domains like 'netcdn.tw' and 'library.unissula.ac.id' under the guise of game-related cheats.

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/431946152/how-to-get-free-robux-app-game-hack
    • http://library.unissula.ac.id/fk//repository/promo-code-free-robux_GM431946152.pdf
    • http://library.unissula.ac.id/fk/repository/free-robux-generator-no-installing-apps_GM431946152.pdf
    • http://library.unissula.ac.id/fk/repository/how-to-hack-filter-enabled-games-roblox_GM431946152.pdf
    • http://library.unissula.ac.id/fk/repository/roblox-bloxburg-hack-game-guardian_GM431946152.pdf
    • http://library.unissula.ac.id/fk//repository/how-to-get-a-free-pokemon-go-account_GM1094591345.pdf
    • http://library.unissula.ac.id/fk//repository/roblox-adopt-me-hacks-2021_GM431946152.pdf
    • http://library.unissula.ac.id/fk/repository/free-working-roblox-gift-card-codes_GM431946152.pdf
    • http://library.unissula.ac.id/fk/repository/roblox-bone-break-cheat-engine_GM431946152.pdf
    • http://library.unissula.ac.id/fk//repository/roblox-booga-booga-hack_GM431946152.pdf
    • http://library.unissula.ac.id/fk/repository/free-promocode-that-gives-you-750-000-robux_GM431946152.pdf
    • http://library.unissula.ac.id/fk//repository/coin-master-village-4_GM406889139.pdf
    • http://library.unissula.ac.id/fk//repository/free-roblox-pin-codes_GM431946152.pdf
    • http://library.unissula.ac.id/fk/repository/card-hack-in-coin-master_GM406889139.pdf
    • http://library.unissula.ac.id/fk//repository/coin-master-download-hack-ios_GM406889139.pdf
    • http://library.unissula.ac.id/fk/repository/roblox-tix-hack_GM431946152.pdf
    • http://library.unissula.ac.id/fk/repository/how-to-get-free-robux-without-downloading-anything-2021_GM431946152.pdf
    • http://library.unissula.ac.id/fk/repository/free-exploits-on-roblox_GM431946152.pdf
    • http://library.unissula.ac.id/fk/repository/roblox-lumber-tycoon-2-hack-download_GM431946152.pdf
    • http://library.unissula.ac.id/fe/repository/get-free-tiktok-followers_GM835599320.pdf
    • http://library.unissula.ac.id/fk/repository/free-robux-no-verification-no-download-no-survey-2021_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000030f9.bin
64f9014894e7d8d1519900487ad0d8c54aa70ee5772b5a6403b2b5620967bc29		 pdf-font-stream PDF embedded font (sfnt) at offset 0x30F9 22280 bytes
font_01_sfnt_off00006298.bin
ee53d07219221ba0fdfe81894d5ca599fe468676eb87c1173a0c0a62f90b0706		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6298 19160 bytes

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