Malicious PDF — malware analysis report

Static analysis result for SHA-256 6957c8fc37ff5490…

MALICIOUS

PDF

44.7 KB Created: 2021-06-09 03:59:12 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 9ac5e24b6d272681b9e2c7fad8679ae3 SHA-1: 620757099276e5c49eec1eeff98f28712d0e83e1 SHA-256: 6957c8fc37ff549038df0a486216c95f03f7b84cdd68d3c60a5cb3e01f748433
102 Risk Score

Malware Insights

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

The PDF document contains a large number of external links, many of which appear to be related to game hacks and free in-game currency, suggesting a lure for users interested in such topics. The heuristic 'PDF_SEO_LINK_FARM' indicates a mass of external links, and the ML classifier strongly flagged this PDF as malicious. The presence of a 'download button' heuristic further supports the idea that the document is designed to trick users into clicking malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

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/top-5-games-on-roblox-that-gives-me-free-robux-game-hack
    • http://library.fisip.upnvj.ac.id/repository/coin-master-hack-2021-ios-download_GM406889139.pdf
    • http://library.fisip.upnvj.ac.id/repository/hack-de-coin-master_GM406889139.pdf
    • http://library.fisip.upnvj.ac.id/repository/earn-free-robux-for-roblox_GM431946152.pdf
    • http://library.fisip.upnvj.ac.id/repository/how-to-hack-roblox-booga-booga-on-mac_GM431946152.pdf
    • http://library.fisip.upnvj.ac.id/repository/plug-toolbox-for-minecraft-free-ios_GM479516143.pdf
    • http://library.fisip.upnvj.ac.id/repository/coin-master-hack-unlimited-spins-game-download_GM406889139.pdf
    • http://library.fisip.upnvj.ac.id/repository/how-to-get-roblox-premium-for-free_GM431946152.pdf
    • http://library.fisip.upnvj.ac.id/repository/coin-master-hack-android-root_GM406889139.pdf
    • http://library.fisip.upnvj.ac.id/repository/free-robux-with-no-survey_GM431946152.pdf
    • http://library.fisip.upnvj.ac.id/repository/how-to-hack-minecraft_GM479516143.pdf
    • http://library.fisip.upnvj.ac.id/repository/minecraft-education-edition-free_GM479516143.pdf
    • http://library.fisip.upnvj.ac.id/repository/oginject-co_GM406889139.pdf
    • http://library.fisip.upnvj.ac.id/repository/how-to-get-a-lot-of-robux_GM431946152.pdf
    • http://library.fisip.upnvj.ac.id/repository/ways-to-get-robux_GM431946152.pdf
    • http://library.fisip.upnvj.ac.id/repository/free-minecraft-java-edition-codes_GM479516143.pdf
    • http://library.fisip.upnvj.ac.id/repository/free-robux-app_GM431946152.pdf
    • http://library.fisip.upnvj.ac.id/repository/free-spins-coin-master_GM406889139.pdf
    • http://library.fisip.upnvj.ac.id/repository/coin-master-app-for-free-spins_GM406889139.pdf
    • http://library.fisip.upnvj.ac.id/repository/daily-free-spins_GM406889139.pdf
    • http://library.fisip.upnvj.ac.id/repository/roblox-games-that-give-you-free-robux_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004fe2.bin
ccfdfe1daae7c90a494bac53d7fcf57ae0618bcee153e492203ddda45812f7f7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4FE2 24572 bytes
font_01_sfnt_off00008867.bin
1874bc3801ebb20e08266960fa843a5e03016ebeff4c26e116922a928824975c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8867 19584 bytes

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