Malicious PDF — malware analysis report

Static analysis result for SHA-256 b88018e18ca83366…

MALICIOUS

PDF

36.3 KB Created: 2021-06-29 05:01:20 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: ca8e09ed31097be8b0f05e316a235462 SHA-1: 9c9e954776acbb14c1fc6429a40e71f4cdf11939 SHA-256: b88018e18ca83366f652f2ee9ac320407161cc66ec50b4caf986e72a348b88c4
102 Risk Score

Malware Insights

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

The PDF document contains numerous embedded links and a prominent call-to-action related to 'Free Robux' and game hacks, aiming to trick users into downloading a payload from the provided URL. The PDF_SEO_LINK_FARM heuristic indicates a large number of external links, suggesting a link farm or redirection strategy. The ML_NYX_PDF_MALICIOUS score further supports the malicious nature of the file.

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-robux-with-adblocker-game-hack
    • https://digilib.widyagamahusada.ac.id/repository/jailbreak-roblox-free-money_GM431946152.pdf
    • https://digilib.widyagamahusada.ac.id/repository/how-to-get-free-robux-on-discord_GM431946152.pdf
    • https://digilib.widyagamahusada.ac.id/repository/how-to-get-free-robux-without-verification-or-surveys_GM431946152.pdf
    • https://digilib.widyagamahusada.ac.id/repository/diamond-modz-roblox-hacks_GM431946152.pdf
    • https://digilib.widyagamahusada.ac.id/repository/how-to-win-attack-madness-in-coin-master-hack_GM406889139.pdf
    • https://digilib.widyagamahusada.ac.id/repository/a-lot-of-robux_GM431946152.pdf
    • https://digilib.widyagamahusada.ac.id/repository/how-can-you-get-free-spins-on-coin-master_GM406889139.pdf
    • https://digilib.widyagamahusada.ac.id/repository/free-stuff-for-roblox-avatar_GM431946152.pdf
    • https://digilib.widyagamahusada.ac.id/repository/how-to-get-a-lot-of-robux_GM431946152.pdf
    • https://digilib.widyagamahusada.ac.id/repository/how-to-get-free-roebucks-on-roblox_GM431946152.pdf
    • https://digilib.widyagamahusada.ac.id/repository/how-to-cheat-on-roblox-guess-character_GM431946152.pdf
    • https://digilib.widyagamahusada.ac.id/repository/roblox-the-plaza-money-cheat_GM431946152.pdf
    • https://digilib.widyagamahusada.ac.id/repository/coin-master-daily-free-spins-and-coins-2021_GM406889139.pdf
    • https://digilib.widyagamahusada.ac.id/repository/play-coin-master-online-free_GM406889139.pdf
    • https://digilib.widyagamahusada.ac.id/repository/is-tiktok-free-on-voxi_GM835599320.pdf
    • https://digilib.widyagamahusada.ac.id/repository/free-robux-claim_GM431946152.pdf
    • https://digilib.widyagamahusada.ac.id/repository/earn-free-spins-for-coin-master_GM406889139.pdf
    • https://digilib.widyagamahusada.ac.id/repository/roblox-games-with-free-boombox_GM431946152.pdf
    • https://digilib.widyagamahusada.ac.id/repository/earn-robux-today-free-watching-ads_GM431946152.pdf
    • https://digilib.widyagamahusada.ac.id/repository/rbxoffers-com-earn-free-robux_GM431946152.pdf
    • https://www.roblox.com/my/tasks
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000334a.bin
9da2420d886496cf3b517f90b704ebd9fc398e0f84557bdbf422e47b26ee36d9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x334A 22992 bytes
font_01_sfnt_off000066f6.bin
66ae847ace156a1de297bc0386a8a4890ae7a8a4d76c4577f4580c80c4dfde5f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x66F6 19720 bytes

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