Malicious PDF — malware analysis report

Static analysis result for SHA-256 810ad2d3560b63df…

MALICIOUS

PDF

34.5 KB Created: 2021-06-19 14:48:33 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: ba86be51eb4ab4b58206b946c75d80b9 SHA-1: 486d4dd3ca8f36711b68f05f7c819483f1e0088f SHA-256: 810ad2d3560b63df58e45e1fc953def306c92a2cd5177ab1b3039524d6df6747
102 Risk Score

Malware Insights

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

The PDF document contains numerous embedded links that mimic SEO-optimized content, promising free items or cheats for popular games. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of such links, and the ML classifier strongly suggests maliciousness. The document body and extracted URLs point towards a scam designed to redirect users to potentially malicious websites or download pages.

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/play-games-online-free-roblox-game-hack
    • http://elibrary.smknesbu.sch.id/repository/sandra-how-to-get-free-items-roblox_GM431946152.pdf
    • http://elibrary.smknesbu.sch.id/repository/coin-master-free-spins-app_GM406889139.pdf
    • http://elibrary.smknesbu.sch.id/repository/100-free-spins-on-coin-master_GM406889139.pdf
    • http://elibrary.smknesbu.sch.id/repository/how-to-download-minecraft-for-free-on-iphone_GM479516143.pdf
    • http://elibrary.smknesbu.sch.id/repository/daily-free-spin-coin-master-link_GM406889139.pdf
    • http://elibrary.smknesbu.sch.id/repository/free-robux-websites-that-work_GM431946152.pdf
    • http://elibrary.smknesbu.sch.id/repository/free-minecraft-games-for-kids_GM479516143.pdf
    • http://elibrary.smknesbu.sch.id/repository/easy-robux-hack_GM431946152.pdf
    • http://elibrary.smknesbu.sch.id/repository/roblox-hack-online-cheats-tool_GM431946152.pdf
    • http://elibrary.smknesbu.sch.id/repository/how-to-get-a-gamepass-on-roblox-for-free-2021_GM431946152.pdf
    • http://elibrary.smknesbu.sch.id/repository/free-coin-master-cards_GM406889139.pdf
    • http://elibrary.smknesbu.sch.id/repository/how-to-make-clothes-on-roblox-for-free_GM431946152.pdf
    • http://elibrary.smknesbu.sch.id/repository/roblox-hack-unlimited-robux-hack_GM431946152.pdf
    • http://elibrary.smknesbu.sch.id/repository/roblox-base-wars-the-land-cheats_GM431946152.pdf
    • http://elibrary.smknesbu.sch.id/repository/gameblox-free-robux_GM431946152.pdf
    • http://elibrary.smknesbu.sch.id/repository/pastebin-hack-robux-free_GM431946152.pdf
    • http://elibrary.smknesbu.sch.id/repository/is-roblox-free-on-nintendo-switch_GM431946152.pdf
    • http://elibrary.smknesbu.sch.id/repository/roblox-pink-free-robux_GM431946152.pdf
    • http://elibrary.smknesbu.sch.id/repository/daily-free-spins-coin-master_GM406889139.pdf
    • http://elibrary.smknesbu.sch.id/repository/how-can-i-get-free-robux_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002e7f.bin
1afab752fe612dbf9c9b2f16836052b3bed5fbfdc88113e9dbdaddecf5a020ae		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2E7F 22660 bytes
font_01_sfnt_off00006133.bin
098eb52053d7b7f37fc73b03c7e93e860dd73b214a8463d1c0db50988584b381		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6133 19364 bytes

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