Malicious PDF — malware analysis report

Static analysis result for SHA-256 db132592b2749912…

MALICIOUS

PDF

42.3 KB Created: 2021-05-10 17:16:49 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: fd9f5a9556a3cf2ad328b456fc297e25 SHA-1: a8e985d527d566f62730c1dbadf1cec1e40e7664 SHA-256: db132592b27499122c3f8f14cba36e474cc3d86190a1b763121a4694ec19e72c
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous embedded links and a "download button" lure, directing users to websites offering "free Robux" or "Coin Master" hacks. The PDF_SEO_LINK_FARM heuristic indicates a large number of external links, suggesting a link farm designed to attract users searching for these cheats. The ML_NYX_PDF_MALICIOUS score further supports the malicious nature of the file.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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 https://netcdn.xyz/app/431946152/instantrobux-game-hack
    • http://elibrary.smknesbu.sch.id/repository/free-robux-come_GM431946152.pdf
    • http://elibrary.smknesbu.sch.id/repository/today-free-spin-link-for-coin-master_GM406889139.pdf
    • http://elibrary.smknesbu.sch.id/repository/how-to-get-free-robux-for-free_GM431946152.pdf
    • http://elibrary.smknesbu.sch.id/repository/show-me-how-to-get-free-robux_GM431946152.pdf
    • http://elibrary.smknesbu.sch.id/repository/roblox-robux-hack_GM431946152.pdf
    • http://elibrary.smknesbu.sch.id/repository/blox-rewards_GM431946152.pdf
    • http://elibrary.smknesbu.sch.id/repository/coin-master-spin-hack-no-verification_GM406889139.pdf
    • http://elibrary.smknesbu.sch.id/repository/coin-master-hack-apk-july-2021_GM406889139.pdf
    • http://elibrary.smknesbu.sch.id/repository/how-to-make-clothes-on-roblox-for-free_GM431946152.pdf
    • http://elibrary.smknesbu.sch.id/repository/coin-master-15-free-spin-link-of-last-5-days_GM406889139.pdf
    • http://elibrary.smknesbu.sch.id/repository/how-to-get-minecraft-for-free-on-chromebook_GM479516143.pdf
    • http://elibrary.smknesbu.sch.id/repository/coin-master-hacks-for-iphone_GM406889139.pdf
    • http://elibrary.smknesbu.sch.id/repository/coin-master-free-spins-link_GM406889139.pdf
    • http://elibrary.smknesbu.sch.id/repository/free-robux-no-offers_GM431946152.pdf
    • http://elibrary.smknesbu.sch.id/repository/get-free-robux-2021_GM431946152.pdf
    • http://elibrary.smknesbu.sch.id/repository/2021-coin-master-hack-without-verification_GM406889139.pdf
    • http://elibrary.smknesbu.sch.id/repository/free-robux-only-username_GM431946152.pdf
    • http://elibrary.smknesbu.sch.id/repository/free-robux-generator-com-roblox-hack_GM431946152.pdf
    • http://elibrary.smknesbu.sch.id/repository/rewards-roblox-com_GM431946152.pdf
    • http://elibrary.smknesbu.sch.id/repository/how-to-get-free-pet-food-in-coin-master_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004815.bin
83ab9d063d21f5480976617bd94e9df80cc9aaf5fa7c33c2f2b7f05cbc160b2a		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4815 25284 bytes
font_01_sfnt_off00008304.bin
4d77632c85c001e266779ad9698d54220e11b78bd17d8b0f085f3dc4dd17180b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8304 18184 bytes

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