Malicious PDF — malware analysis report

Static analysis result for SHA-256 3426b8376394a4e4…

MALICIOUS

PDF

35.0 KB Created: 2021-06-20 04:53:22 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 9c828aacf057e2b0d23dd21a98c4c84a SHA-1: 91db76c249e9c71b830d77c352a6171e8bf53bdc SHA-256: 3426b8376394a4e4dd039bf738548d53c987da54ab3e0eaf7faf6671323c4406
102 Risk Score

Malware Insights

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

This PDF document exhibits characteristics of a link farm, presenting numerous SEO-optimized links to other PDF files. The primary URL, http://netcdn.co/app/431946152/how-to-change-name-in-roblox-for-free-game-hack, and the numerous linked PDFs suggest a lure for users seeking game-related cheats or items, which could lead to malicious downloads. The ML classifier strongly flagged this PDF as malicious, supporting the assessment of a 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/how-to-change-name-in-roblox-for-free-game-hack
    • http://pustaka.mesin.ft.unand.ac.id/repository/bloxpage-free-robux_GM431946152.pdf
    • http://pustaka.mesin.ft.unand.ac.id/repository/free-robux-real-working_GM431946152.pdf
    • http://pustaka.mesin.ft.unand.ac.id/repository/how-to-get-free-robux-on-computer_GM431946152.pdf
    • http://pustaka.mesin.ft.unand.ac.id/repository/minecraft-bedrock-edition-pc-free_GM479516143.pdf
    • http://pustaka.mesin.ft.unand.ac.id/repository/hacks-piano-roblox_GM431946152.pdf
    • http://pustaka.mesin.ft.unand.ac.id/repository/coin-master-free-spins-link-today-facebook_GM406889139.pdf
    • http://pustaka.mesin.ft.unand.ac.id/repository/coin-master-free-spins-cheat_GM406889139.pdf
    • http://pustaka.mesin.ft.unand.ac.id/repository/a-game-were-you-can-get-free-robux-roblox_GM431946152.pdf
    • http://pustaka.mesin.ft.unand.ac.id/repository/como-hackear-coin-master-iphone_GM406889139.pdf
    • http://pustaka.mesin.ft.unand.ac.id/repository/comment-cheater-sur-roblox-franais_GM431946152.pdf
    • http://pustaka.mesin.ft.unand.ac.id/repository/top-free-commands-in-roblox-which-works-in-all-games_GM431946152.pdf
    • http://pustaka.mesin.ft.unand.ac.id/repository/free-spins-coin-master-app_GM406889139.pdf
    • http://pustaka.mesin.ft.unand.ac.id/repository/free-coin-master-spins-2021_GM406889139.pdf
    • http://pustaka.mesin.ft.unand.ac.id/repository/how-to-get-free-spins-on-coin-master-hack_GM406889139.pdf
    • http://pustaka.mesin.ft.unand.ac.id/repository/coin-master-hack-xyz-download-free_GM406889139.pdf
    • http://pustaka.mesin.ft.unand.ac.id/repository/free-robux-no-download_GM431946152.pdf
    • http://pustaka.mesin.ft.unand.ac.id/repository/roblox-arsenal-hack-script-pastebin_GM431946152.pdf
    • http://pustaka.mesin.ft.unand.ac.id/repository/free-multiplayer-minecraft-server_GM479516143.pdf
    • http://pustaka.mesin.ft.unand.ac.id/repository/how-to-get-money-on-roblox-with-cheat-engine-63_GM431946152.pdf
    • http://pustaka.mesin.ft.unand.ac.id/repository/free-prankster-face-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_off000030da.bin
d6c8abc8da84b01beecd947dd95eacc07312504725c6652581a54418ab187efd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x30DA 22620 bytes
font_01_sfnt_off00006352.bin
49c6c63ea6222c01c25533864aa5ab0e4c39bdcce09736bfc3043706d96f44c8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6352 19240 bytes

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