Malicious PDF — malware analysis report

Static analysis result for SHA-256 519096c7f72ab9eb…

MALICIOUS

PDF

35.3 KB Created: 2021-07-05 21:46:12 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 1222e9c9544ba414313de3b0be4d8198 SHA-1: 2f59c8656c430bec32aa5d37f718d2c86be56789 SHA-256: 519096c7f72ab9eb0a02720f0ca9a0155e6013596af7f5256119d485b753603d
102 Risk Score

Malware Insights

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

This PDF document was generated by wkhtmltopdf and contains numerous embedded URLs, many of which are designed to appear as links to game hacks or cheats. The heuristic PDF_SEO_LINK_FARM indicates a large number of external links, suggesting a link farm or SEO poisoning tactic. The ML_NYX_PDF_MALICIOUS classifier strongly flags this PDF as malicious, and the presence of a 'download button' lure further supports a malicious intent to redirect users to 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.tw/app/431946152/roblox-cubes-of-the-gods-hack-game-hack
    • http://library.feb.unila.ac.id/rfeb/repository/roblox-avatar-editor-free_GM431946152.pdf
    • http://library.feb.unila.ac.id/rfeb//repository/how-to-get-free-robux-without-offers_GM431946152.pdf
    • http://library.feb.unila.ac.id/rfeb/repository/free-robux-codes-no-download-no-survey_GM431946152.pdf
    • http://library.feb.unila.ac.id/rfeb/repository/coin-master-hack-ios-no-verification_GM406889139.pdf
    • http://library.feb.unila.ac.id/rfeb/repository/any-free-stuff-on-roblox_GM431946152.pdf
    • http://library.feb.unila.ac.id/rfeb/repository/go-to-get-robux-for-free_GM431946152.pdf
    • http://library.feb.unila.ac.id/rfeb/repository/inject-hack-free-robux-2021_GM431946152.pdf
    • http://library.feb.unila.ac.id/rfeb/repository/how-to-get-free-robux-on-roblox-xbox-one-2021_GM431946152.pdf
    • http://library.feb.unila.ac.id/rfeb//repository/coin-master-daily-free-spin-app_GM406889139.pdf
    • http://library.feb.unila.ac.id/rfeb/repository/free-account-roblox-with-robux_GM431946152.pdf
    • http://library.feb.unila.ac.id/rfeb/repository/oneapprewards-free-robux_GM431946152.pdf
    • http://library.feb.unila.ac.id/rfeb//repository/free-coin-master-spins-2021-link_GM406889139.pdf
    • http://library.feb.unila.ac.id/rfeb/repository/how-to-open-cheat-engine-in-roblox-2021_GM431946152.pdf
    • http://library.feb.unila.ac.id/rfeb//repository/free-coins-spins-on-coin-master_GM406889139.pdf
    • http://library.feb.unila.ac.id/rfeb/repository/roblox-girl-shirts-for-free_GM431946152.pdf
    • http://library.feb.unila.ac.id/rfeb//repository/free-spins-coin-master-links-thursday-november-28-2021_GM406889139.pdf
    • http://library.feb.unila.ac.id/rfeb//repository/how-do-you-get-free-robux-without-paying_GM431946152.pdf
    • http://library.feb.unila.ac.id/rfeb//repository/coin-master-daily-free-spins-link-today_GM406889139.pdf
    • http://library.feb.unila.ac.id/rfeb/repository/coin-master-games-download-free_GM406889139.pdf
    • http://library.feb.unila.ac.id/rfeb/repository/cheat-codes-for-coin-master_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000030fb.bin
961c7ba563dc886e5dc747e22a034dbdecbca2cfb55d1c0473e49f0978c6f875		 pdf-font-stream PDF embedded font (sfnt) at offset 0x30FB 23124 bytes
font_01_sfnt_off00006551.bin
69e1e37dfdd0e5ff47a6ebea9f5c8de57d05f43a0e5fb7bec6c39f295a0d55e5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6551 18952 bytes

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