Malicious PDF — malware analysis report

Static analysis result for SHA-256 e754268a3d3c2020…

MALICIOUS

PDF

34.1 KB Created: 2021-06-26 08:23:40 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 01834c64bfe19f63938061c4360a864f SHA-1: be8fb97a1eda6df94bbd1a5bf37fddba9452e841 SHA-256: e754268a3d3c2020a48183f7897c007d52db017225c0a828bafd6869d7ed9cbd
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous embedded URLs and a document body that lures users with promises of free Robux and game hacks. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external links, suggesting a link farm designed to drive traffic to potentially malicious sites. The ML classifier also flagged this PDF as malicious with high confidence. The primary attack pattern involves social engineering to trick users into clicking on these links, which likely lead to malware downloads or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9824

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/youtube-free-robux-november-2021-game-hack
    • http://digilib.pustaka.unand.ac.id/repository/free-minecraft-alts_GM479516143.pdf
    • http://digilib.pustaka.unand.ac.id/repository/when-you-get-hacked-on-roblox-rage-quit_GM431946152.pdf
    • http://digilib.pustaka.unand.ac.id/repository/minecraft-bedrock-hacks_GM479516143.pdf
    • http://digilib.pustaka.unand.ac.id/repository/free-scripts-for-roblox-exploit_GM431946152.pdf
    • http://digilib.pustaka.unand.ac.id/repository/how-to-use-cheat-engine-for-roblox-2021_GM431946152.pdf
    • http://digilib.pustaka.unand.ac.id/repository/how-to-hack-points-on-roblox-hide-and-seek_GM431946152.pdf
    • http://digilib.pustaka.unand.ac.id/repository/how-to-hack-someones-computer-through-roblox_GM431946152.pdf
    • http://digilib.pustaka.unand.ac.id/repository/roblox-hack-download_GM431946152.pdf
    • http://digilib.pustaka.unand.ac.id/repository/roblox-free-download-pc-windows-10_GM431946152.pdf
    • http://digilib.pustaka.unand.ac.id/repository/roblox-free-robux-codes-on-ipad_GM431946152.pdf
    • http://digilib.pustaka.unand.ac.id/repository/how-to-hack-roblox-with-artmoney_GM431946152.pdf
    • http://digilib.pustaka.unand.ac.id/repository/free-minecraft-hacks_GM479516143.pdf
    • http://digilib.pustaka.unand.ac.id/repository/how-can-i-get-free-robux_GM431946152.pdf
    • http://digilib.pustaka.unand.ac.id/repository/free-tix-roblox-pbb_GM431946152.pdf
    • http://digilib.pustaka.unand.ac.id/repository/roblox-lumber-tycoon-2-cheat-engine_GM431946152.pdf
    • http://digilib.pustaka.unand.ac.id/repository/robux-hack-no-download_GM431946152.pdf
    • http://digilib.pustaka.unand.ac.id/repository/how-to-get-a-lue-injector-for-hacking-roblox_GM431946152.pdf
    • http://digilib.pustaka.unand.ac.id/repository/hacks-for-ninja-legends-roblox-mobile_GM431946152.pdf
    • http://digilib.pustaka.unand.ac.id/repository/free-robux-codes-2021_GM431946152.pdf
    • http://digilib.pustaka.unand.ac.id/repository/how-do-you-download-roblox-for-free_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002bb4.bin
ab52d1216eda0ded8a215b33f8449fb521d2412858799bc50b4aa0175c243049		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2BB4 22572 bytes
font_01_sfnt_off00005e55.bin
87106bfd111c1c3d8681f906b5d9798d9e9e9ec5253593d205e514e039130b35		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5E55 19756 bytes

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