Malicious PDF — malware analysis report

Static analysis result for SHA-256 95743666a3056d8c…

MALICIOUS

PDF

35.1 KB Created: 2021-06-29 12:30:19 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 17a427c4b92d30f6f77fd7e90583a9d1 SHA-1: 5709449b0299b25007bd09c0b24c0e9a09c63005 SHA-256: 95743666a3056d8cccbb96e1af2c8a613b30b3c41772f3d261e4dd14867ecd77
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains a large number of embedded URLs, many of which are structured as SEO-optimized links pointing to free in-game currency or hacks for popular games. The heuristic 'PDF_SEO_LINK_FARM' indicates a mass of external links, and the ML classifier strongly flagged this PDF as malicious. The document body and embedded URLs suggest a lure to download or access potentially harmful content.

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/op-rewards-free-robux-2021-game-hack
    • http://pustaka.biologi.fmipa.unand.ac.id/repository/get-free-robux-on-roblox-games_GM431946152.pdf
    • http://pustaka.biologi.fmipa.unand.ac.id/repository/how-to-get-free-spins-for-coin-master_GM406889139.pdf
    • http://pustaka.biologi.fmipa.unand.ac.id/repository/download-free-roblox-clothes_GM431946152.pdf
    • http://pustaka.biologi.fmipa.unand.ac.id/repository/moonactive-coin-master-free-spins_GM406889139.pdf
    • http://pustaka.biologi.fmipa.unand.ac.id/repository/free-robux-on-iphone_GM431946152.pdf
    • http://pustaka.biologi.fmipa.unand.ac.id/repository/robux-hack-tools_GM431946152.pdf
    • http://pustaka.biologi.fmipa.unand.ac.id/repository/cheat-engine-roblox-mad-city_GM431946152.pdf
    • http://pustaka.biologi.fmipa.unand.ac.id/repository/roblox-2021-cheats-flying_GM431946152.pdf
    • http://pustaka.biologi.fmipa.unand.ac.id/repository/counter-roblox-offensive-noclip-hack_GM431946152.pdf
    • http://pustaka.biologi.fmipa.unand.ac.id/repository/ways-to-get-free-robux_GM431946152.pdf
    • http://pustaka.biologi.fmipa.unand.ac.id/repository/paint-and-guess-roblox-hack_GM431946152.pdf
    • http://pustaka.biologi.fmipa.unand.ac.id/repository/how-to-get-free-robux-by-just-watching-a-video_GM431946152.pdf
    • http://pustaka.biologi.fmipa.unand.ac.id/repository/coin-master-free-coins-2021_GM406889139.pdf
    • http://pustaka.biologi.fmipa.unand.ac.id/repository/how-to-get-free-items-on-roblox-with-inspect-element_GM431946152.pdf
    • http://pustaka.biologi.fmipa.unand.ac.id/repository/games-that-gives-free-robux-2021-july_GM431946152.pdf
    • http://pustaka.biologi.fmipa.unand.ac.id/repository/roblox-phantom-forces-wall-hack_GM431946152.pdf
    • http://pustaka.biologi.fmipa.unand.ac.id/repository/how-to-get-free-robux-on-xbox-one-2021_GM431946152.pdf
    • http://pustaka.biologi.fmipa.unand.ac.id/repository/all-vip-admin-commands-for-free-roblox_GM431946152.pdf
    • http://pustaka.biologi.fmipa.unand.ac.id/repository/roblox-cbro-hacker-gets-banned-mid-game_GM431946152.pdf
    • http://pustaka.biologi.fmipa.unand.ac.id/repository/how-to-get-free-stuff-on-roblox-high-school_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000030bf.bin
059e525552ab1eddcfd8ed859c4757c0dc69833fc0d67556c1f4e42a7b4faad2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x30BF 22364 bytes
font_01_sfnt_off00006260.bin
2775ebc6288f928c31b6a894b0e91f20d706490a48f9ef868f2049f3faeb24c8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6260 19632 bytes

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