Malicious PDF — malware analysis report

Static analysis result for SHA-256 4eb84070258bdf78…

MALICIOUS

PDF

35.5 KB Created: 2021-06-29 04:05:35 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 746371d4c2412832b841d9ddf6f5494b SHA-1: 2698c4c23c29853251ca56bda65b93ac49067a72 SHA-256: 4eb84070258bdf782d16912672b0b1e95444fed6386416d3e76a3b52f44d9f24
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document is designed to lure users into clicking links that lead to a large collection of other SEO-optimized PDF files, likely serving as a link farm or a distribution point for further malicious content. The document body contains numerous URLs related to game hacks and free in-game items, indicating a phishing or scamming attempt. The ML classifier strongly flagged this PDF as malicious, and the presence of a link farm further supports its malicious intent.

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-3d-modeling-software-for-roblox-game-hack
    • http://pustaka.ust.ac.id/repository/spin-hack-roblox_GM431946152.pdf
    • http://pustaka.ust.ac.id/repository/free-coin-master-spins-daily_GM406889139.pdf
    • http://pustaka.ust.ac.id/repository/how-to-get-free-robux-2021-june_GM431946152.pdf
    • http://pustaka.ust.ac.id/repository/free-robux-no-games-to-download_GM431946152.pdf
    • http://pustaka.ust.ac.id/repository/how-to-get-back-a-hacked-roblox-account_GM431946152.pdf
    • http://pustaka.ust.ac.id/repository/coin-master-free-cards-link-2021_GM406889139.pdf
    • http://pustaka.ust.ac.id/repository/free-roblox-transprent-pants_GM431946152.pdf
    • http://pustaka.ust.ac.id/repository/op-rewards-free-robux_GM431946152.pdf
    • http://pustaka.ust.ac.id/repository/roblox-account-hacker-2021_GM431946152.pdf
    • http://pustaka.ust.ac.id/repository/free-printable-minecraft-coloring-pages_GM479516143.pdf
    • http://pustaka.ust.ac.id/repository/how-to-make-a-developer-product-free-on-roblox_GM431946152.pdf
    • http://pustaka.ust.ac.id/repository/toolbox-apk_GM479516143.pdf
    • http://pustaka.ust.ac.id/repository/roblox-dragon-simolator-hack-script_GM431946152.pdf
    • http://pustaka.ust.ac.id/repository/free-spins-coin-master-app_GM406889139.pdf
    • http://pustaka.ust.ac.id/repository/how-to-annoy-roblox-server-hack_GM431946152.pdf
    • http://pustaka.ust.ac.id/repository/free-robux-generator-2021-no-human-verification_GM431946152.pdf
    • http://pustaka.ust.ac.id/repository/robuxlove-net-free-robux_GM431946152.pdf
    • http://pustaka.ust.ac.id/repository/free-coins-on-coin-master_GM406889139.pdf
    • http://pustaka.ust.ac.id/repository/como-conseguir-monedas-infinitas-y-tiradas-de-coin-master-hack_GM406889139.pdf
    • http://pustaka.ust.ac.id/repository/freerobux-hack-us_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00003233.bin
22c4a8a44f584738069e4d6963217d6ab61e770b14e3ab1a0c9f820e8883e802		 pdf-font-stream PDF embedded font (sfnt) at offset 0x3233 22396 bytes
font_01_sfnt_off000063f9.bin
588d649401c34d6d6f0ec21ed4a97944282c68793b5dfdbe6eafe1da91e0d152		 pdf-font-stream PDF embedded font (sfnt) at offset 0x63F9 19584 bytes

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