Malicious PDF — malware analysis report

Static analysis result for SHA-256 c3a3a105929fb90c…

MALICIOUS

PDF

35.3 KB Created: 2021-07-01 07:49:42 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 0a4770dc305f771b27f7db525d971b88 SHA-1: b8915024b77232f9fb34ab65dc6d6fc6e0bb5b4d SHA-256: c3a3a105929fb90cca42be6f337e9e8223114e1f610f9248cb881b1bfe0a32f4
102 Risk Score

Malware Insights

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

The PDF document contains numerous links to external websites, many of which are presented as "hack clients" or "game hacks" for popular games like Roblox and Coin Master. The heuristic `PDF_SEO_LINK_FARM` indicates a large number of these links, suggesting a coordinated effort to direct users to potentially malicious content. The ML classifier also flagged this PDF as malicious with high confidence.

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/hack-client-maker-for-roblox-game-hack
    • http://stmb-multismart.ac.id/perpustakaan/repository/free-gold-cards-coin-master_GM406889139.pdf
    • http://stmb-multismart.ac.id/perpustakaan/repository/haktuts-coin-master-free-daily-spins_GM406889139.pdf
    • http://stmb-multismart.ac.id/perpustakaan/repository/coin-master-free-gold-cards-link_GM406889139.pdf
    • http://stmb-multismart.ac.id/perpustakaan/repository/coin-master-card-link-free_GM406889139.pdf
    • http://stmb-multismart.ac.id/perpustakaan/repository/free-robux-generator-2021-no-verification_GM431946152.pdf
    • http://stmb-multismart.ac.id/perpustakaan/repository/wwwhaktutsin-2021-08-coinmasterfreespinandcoinlinkhtml-m-1_GM406889139.pdf
    • http://stmb-multismart.ac.id/perpustakaan/repository/free-model-roblox-games_GM431946152.pdf
    • http://stmb-multismart.ac.id/perpustakaan/repository/roblox-scripts-free_GM431946152.pdf
    • http://stmb-multismart.ac.id/perpustakaan/repository/roblox-android-cheats_GM431946152.pdf
    • http://stmb-multismart.ac.id/perpustakaan/repository/cmaster-club-coin-master-hack_GM406889139.pdf
    • http://stmb-multismart.ac.id/perpustakaan/repository/how-do-you-hack-a-roblox-account_GM431946152.pdf
    • http://stmb-multismart.ac.id/perpustakaan/repository/free-pc-games-like-roblox_GM431946152.pdf
    • http://stmb-multismart.ac.id/perpustakaan/repository/roblox-e-free_GM431946152.pdf
    • http://stmb-multismart.ac.id/perpustakaan/repository/roblox-easy-hacks-to-get-no-virouses_GM431946152.pdf
    • http://stmb-multismart.ac.id/perpustakaan/repository/free-coin-master-links_GM406889139.pdf
    • http://stmb-multismart.ac.id/perpustakaan/repository/vip-hack-roblox_GM431946152.pdf
    • http://stmb-multismart.ac.id/perpustakaan/repository/coin-master-free-rewards-link_GM406889139.pdf
    • http://stmb-multismart.ac.id/perpustakaan/repository/how-to-get-free-robux-in-2021_GM431946152.pdf
    • http://stmb-multismart.ac.id/perpustakaan/repository/free-robux-gift-card-giveaway-live_GM431946152.pdf
    • http://stmb-multismart.ac.id/perpustakaan/repository/is-minecraft-free-on-xbox-one_GM479516143.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000031ff.bin
5082193725b32658774736febe77ef81b390ebd06ca25ab58133147d132be108		 pdf-font-stream PDF embedded font (sfnt) at offset 0x31FF 22644 bytes
font_01_sfnt_off000064af.bin
8251dcc9b6750acaf2f80f71119921661e1c97ae7a8a4a22111fadbdef10bb6c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x64AF 19240 bytes

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