Malicious PDF — malware analysis report

Static analysis result for SHA-256 9a4d3eed2c8543c1…

MALICIOUS

PDF

34.1 KB Created: 2021-06-26 05:27:02 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: a2f538b35784bd36970fa1d930379867 SHA-1: 21b6f1683a7702bade681baab6f4acfcc82230fe SHA-256: 9a4d3eed2c8543c1e8d76a5ef8cca7c491fa4f7856f96e7af75c195896785142
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous embedded links to external resources, many of which are presented as hacks or free items for popular games. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of such links, suggesting a tactic to drive traffic to potentially malicious sites. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9983

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/army-tycoon-hack-roblox-game-hack
    • http://lib.stimykpn.ac.id/repository/free-robux-giveaway-live-stream-now_GM431946152.pdf
    • http://lib.stimykpn.ac.id/repository/free-coin-master-spin-and-coin-link_GM406889139.pdf
    • http://lib.stimykpn.ac.id/repository/lockview-hack-roblox_GM431946152.pdf
    • http://lib.stimykpn.ac.id/repository/free-roblox-rescources-no-download-or-verification_GM431946152.pdf
    • http://lib.stimykpn.ac.id/repository/legitimate-coin-master-free-spins-apk_GM406889139.pdf
    • http://lib.stimykpn.ac.id/repository/free-roblox-hakercom_GM431946152.pdf
    • http://lib.stimykpn.ac.id/repository/how-to-make-your-own-minecraft-pe-server-for-free_GM479516143.pdf
    • http://lib.stimykpn.ac.id/repository/roblox-characters-with-free-items_GM431946152.pdf
    • http://lib.stimykpn.ac.id//repository/free-robux-sites-that-work_GM431946152.pdf
    • http://lib.stimykpn.ac.id/repository/coin-master-free-spins-link-whatsapp-group_GM406889139.pdf
    • http://lib.stimykpn.ac.id/repository/fallen-hacks-roblox_GM431946152.pdf
    • http://lib.stimykpn.ac.id/repository/best-free-stuff-on-roblox_GM431946152.pdf
    • http://lib.stimykpn.ac.id//repository/free-roblox-promo-codes-for-robux_GM431946152.pdf
    • http://lib.stimykpn.ac.id/repository/how-to-hack-pet-trainer-roblox_GM431946152.pdf
    • http://lib.stimykpn.ac.id//repository/earn-robux-today_GM431946152.pdf
    • http://lib.stimykpn.ac.id/repository/free-roblox-toy-codes-list_GM431946152.pdf
    • http://lib.stimykpn.ac.id//repository/how-to-hack-any-roblox-account_GM431946152.pdf
    • http://lib.stimykpn.ac.id//repository/wwwcoin-master-free-spincom_GM406889139.pdf
    • http://lib.stimykpn.ac.id/repository/roblox-blood-and-iron-music-changer-hack_GM431946152.pdf
    • http://lib.stimykpn.ac.id/repository/get-free-face-roblox_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002fe5.bin
036562e23b0649cc9b3107cf89a2f34e6eb2bf03ee4a7472e3a0212659bfca2e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2FE5 21796 bytes
font_01_sfnt_off00005fd9.bin
a4e3da1794a6a0de384674885d14eb09e75948b48da5849deabd58d09ac661ba		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5FD9 19096 bytes

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