Malicious PDF — malware analysis report

Static analysis result for SHA-256 d5daa9aa08f663e9…

MALICIOUS

PDF

35.1 KB Created: 2021-06-19 17:40:30 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 5172347f9f52f79a9861e65d24087c39 SHA-1: 1f20bb889af7330f4aeb822d785c64a1f2cfbfe7 SHA-256: d5daa9aa08f663e977fa38275c4173d2b6036519ac9e5db951bb6d3852633858
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 SEO-optimized PDFs promising game cheats and hacks. The primary URL, http://netcdn.co/app/431946152/free-robux-generator-com-roblox-hack-game-hack, likely hosts a malicious payload. The heuristic PDF_SEO_LINK_FARM indicates a large number of these links, suggesting a coordinated effort to distribute malware through deceptive 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/free-robux-generator-com-roblox-hack-game-hack
    • https://lib.insan-unggul.ac.id/repository/how-to-open-a-hack-in-roblox_GM431946152.pdf
    • https://lib.insan-unggul.ac.id/repository/free-minecraft-games-for-kids_GM479516143.pdf
    • https://lib.insan-unggul.ac.id/repository/coin-master-free-spins-hack_GM406889139.pdf
    • https://lib.insan-unggul.ac.id/repository/robux-hack-script-in-inspect-code_GM431946152.pdf
    • https://lib.insan-unggul.ac.id/repository/free-roblox-gift-card-uk_GM431946152.pdf
    • https://lib.insan-unggul.ac.id/repository/auxs-roblox-hack-pack_GM431946152.pdf
    • https://lib.insan-unggul.ac.id/repository/hack-coin-master-apk-31_GM406889139.pdf
    • https://lib.insan-unggul.ac.id/repository/hacks-for-roblox-parkour_GM431946152.pdf
    • https://lib.insan-unggul.ac.id/repository/how-to-create-a-minecraft-server-for-free_GM479516143.pdf
    • https://lib.insan-unggul.ac.id/repository/roblox-play-now-for-free_GM431946152.pdf
    • https://lib.insan-unggul.ac.id/repository/coin-master-free-2021-spin-link_GM406889139.pdf
    • https://lib.insan-unggul.ac.id/repository/roblox-how-to-hack-royale-high-for-diamonds_GM431946152.pdf
    • https://lib.insan-unggul.ac.id/repository/how-to-hack-on-roblox-on-a-phone_GM431946152.pdf
    • https://lib.insan-unggul.ac.id/repository/hack-jailbreak-roblox-2021_GM431946152.pdf
    • https://lib.insan-unggul.ac.id/repository/how-to-get-minecraft-for-free-on-mobile_GM479516143.pdf
    • https://lib.insan-unggul.ac.id/repository/free-modded-minecraft-server-hosting_GM479516143.pdf
    • https://lib.insan-unggul.ac.id/repository/robux-hack-giveaway-2021_GM431946152.pdf
    • https://lib.insan-unggul.ac.id/repository/free-roblox-injecter-v3rmillipn_GM431946152.pdf
    • https://lib.insan-unggul.ac.id/repository/daily-coin-master-free-spins_GM406889139.pdf
    • https://lib.insan-unggul.ac.id/repository/aimbot-exe-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_off00003085.bin
093fd713d0957e9f20fd5d34a21ef93e26dff1720976cab6e13b42332691fcfa
pdf-font-stream PDF embedded font (sfnt) at offset 0x3085 22676 bytes
font_01_sfnt_off00006348.bin
b5fe64a349a1260a8bf1e39cb434a35d84e03f20b24c2703f62dd6d7df3547b9
pdf-font-stream PDF embedded font (sfnt) at offset 0x6348 19324 bytes