Malicious PDF — malware analysis report

Static analysis result for SHA-256 5630cb235ce58a11…

MALICIOUS

PDF

36.1 KB Created: 2021-06-29 19:04:07 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 523b9f0211c3eca22e4ecce132e9f828 SHA-1: 89c62c4d44b3e4a206d43bc8b39d0efe57e72a8d SHA-256: 5630cb235ce58a11309316ad63ab957884b4ddc427e0cbe524f639fc84043682
102 Risk Score

Malware Insights

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

The PDF document contains numerous links to external websites, many of which are SEO-optimized pages offering game hacks and cheats. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of such links, suggesting a malicious intent to redirect users to potentially harmful 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/robux-hacks-no-human-verification-2021-game-hack
    • http://elibrary.smknesbu.sch.id/repository/como-descargar-hacks-para-atravesar-paredes-en-roblox_GM431946152.pdf
    • http://elibrary.smknesbu.sch.id/repository/free-spins-coin-master-blogspot_GM406889139.pdf
    • http://elibrary.smknesbu.sch.id/repository/free-minecraft-hacks_GM479516143.pdf
    • http://elibrary.smknesbu.sch.id/repository/today-free-spin-link-for-coin-master_GM406889139.pdf
    • http://elibrary.smknesbu.sch.id/repository/site-de-hack-roblox_GM431946152.pdf
    • http://elibrary.smknesbu.sch.id/repository/how-to-type-like-a-hacker-in-roblox_GM431946152.pdf
    • http://elibrary.smknesbu.sch.id/repository/easy-way-to-get-free-robux_GM431946152.pdf
    • http://elibrary.smknesbu.sch.id/repository/free-robux-generator-no-tan_GM431946152.pdf
    • http://elibrary.smknesbu.sch.id/repository/get-free-robux-2021-no-survey_GM431946152.pdf
    • http://elibrary.smknesbu.sch.id/repository/2021-no-human-verification-hack-for-coin-master_GM406889139.pdf
    • http://elibrary.smknesbu.sch.id/repository/how-to-telecharging-a-website-of-hacking-on-roblox_GM431946152.pdf
    • http://elibrary.smknesbu.sch.id/repository/install-coin-master_GM406889139.pdf
    • http://elibrary.smknesbu.sch.id/repository/roblox-free-clothes-hack_GM431946152.pdf
    • http://elibrary.smknesbu.sch.id/repository/free-spins-on-coin-master-generator_GM406889139.pdf
    • http://elibrary.smknesbu.sch.id/repository/cheat-engine-codes-for-roblox_GM431946152.pdf
    • http://elibrary.smknesbu.sch.id/repository/free-uploader-roblox-exploit_GM431946152.pdf
    • http://elibrary.smknesbu.sch.id/repository/how-to-make-a-badge-for-free-roblox_GM431946152.pdf
    • http://elibrary.smknesbu.sch.id/repository/how-to-hack-robux_GM431946152.pdf
    • http://elibrary.smknesbu.sch.id/repository/free-robux-picture_GM431946152.pdf
    • http://elibrary.smknesbu.sch.id/repository/free-robux-roblox-hack-swirlycandygurl_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00003292.bin
23f251217389daf27acab11df871a4ba5c455b61756bc2c7ef24e03e86d8f5ee		 pdf-font-stream PDF embedded font (sfnt) at offset 0x3292 23076 bytes
font_01_sfnt_off000065fe.bin
857a052353a38f9da21caa0b78d3d9dee11186003082bcee3fe3bcf20bd27774		 pdf-font-stream PDF embedded font (sfnt) at offset 0x65FE 19740 bytes

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