Malicious PDF — malware analysis report

Static analysis result for SHA-256 d9eafd36accb3e89…

MALICIOUS

PDF

35.8 KB Created: 2021-06-23 08:24:44 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 96ecc8c887032fbd1f43839baf621f38 SHA-1: a3de83af15b11b575f12137d18d8e0d856554de2 SHA-256: d9eafd36accb3e8966236594b9b53b92b7e7a844c97e4597d3fe7de722ba71f3
102 Risk Score

Malware Insights

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

This PDF document contains numerous embedded links, many of which point to resources related to game hacks and free in-game currency, such as Robux. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external links, suggesting an attempt to drive traffic to potentially malicious sites or applications. The ML classifier also strongly flagged this PDF as malicious.

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.co/app/431946152/free-robux-no-survey-mobile-game-hack
    • http://library.atim.ac.id/repository/coin-master-free-spin-and-coin_GM406889139.pdf
    • http://library.atim.ac.id/repository/roblox-royalty-free-music-ominous-60_GM431946152.pdf
    • http://library.atim.ac.id/repository/easy-hack-method-roblox_GM431946152.pdf
    • http://library.atim.ac.id/repository/free-robux-hack-no-download-2021_GM431946152.pdf
    • http://library.atim.ac.id/repository/coin-master-daily-free-spins-link_GM406889139.pdf
    • http://library.atim.ac.id/repository/how-to-get-free-robux-and-tix-using-inspect-element_GM431946152.pdf
    • http://library.atim.ac.id/repository/master-coin-free-link_GM406889139.pdf
    • http://library.atim.ac.id/repository/free-robux-mod-roblox_GM431946152.pdf
    • http://library.atim.ac.id/repository/minecraft-bedrock-hacks-windows-10_GM479516143.pdf
    • http://library.atim.ac.id/repository/goo-dot-gl-hnkqwp-replace-dot-with-free-robux_GM431946152.pdf
    • http://library.atim.ac.id/repository/sites-to-get-free-robux_GM431946152.pdf
    • http://library.atim.ac.id/repository/take-a-quize-for-free-robux-gift-card_GM431946152.pdf
    • http://library.atim.ac.id/repository/hack-mod-apk-de-roblox-2_GM431946152.pdf
    • http://library.atim.ac.id/repository/naruto-new-generations-roblox-hack_GM431946152.pdf
    • http://library.atim.ac.id/repository/how-to-have-a-jetpack-on-my-character-free-roblox_GM431946152.pdf
    • http://library.atim.ac.id/repository/roblox-studio-free_GM431946152.pdf
    • http://library.atim.ac.id/repository/free-spin-link-for-coin-master_GM406889139.pdf
    • http://library.atim.ac.id/repository/hack-roblox-accounts-website_GM431946152.pdf
    • http://library.atim.ac.id/repository/coin-master-hack-apk-free-download_GM406889139.pdf
    • http://library.atim.ac.id/repository/free-robux-codes-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_off000032c3.bin
440e0a3991cff2309f308a9f6a8f3f2461586897abaa85bb53173f34f24dc6f4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x32C3 22796 bytes
font_01_sfnt_off000065f5.bin
61acace2f982e362edcd493b5824994630e37394d884254082a81f0b90c54343		 pdf-font-stream PDF embedded font (sfnt) at offset 0x65F5 19400 bytes

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