Malicious PDF — malware analysis report

Static analysis result for SHA-256 1c974b311131077c…

MALICIOUS

PDF

34.4 KB Created: 2021-07-03 22:21:38 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 86413d6c6b8eea66cadbeea22c6b0237 SHA-1: bf61bed72335304e2986dcad797fc9f3f3882b21 SHA-256: 1c974b311131077c69216a349b70f9fc774675bfb0b47c62ed67b984e355cc8a
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF document is identified as malicious by an ML classifier and contains numerous external links, many of which are SEO-optimized PDF documents related to hacking and game exploits. The primary URL, http://netcdn.tw/app/431946152/roblox-account-hacker-tool-game-hack, suggests a lure for downloading a hacking tool. The presence of a 'download button' heuristic further supports the malicious intent of directing users to external resources.

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.tw/app/431946152/roblox-account-hacker-tool-game-hack
    • https://library.stikeswnpalu.ac.id/repository/fight-the-monsters-roblox-hack_GM431946152.pdf
    • https://library.stikeswnpalu.ac.id/repository/robux-fun-hack_GM431946152.pdf
    • https://library.stikeswnpalu.ac.id/repository/can-you-get-hacked-on-roblox-when-giving-discord_GM431946152.pdf
    • https://library.stikeswnpalu.ac.id/repository/coin-master-free-spins_GM406889139.pdf
    • https://library.stikeswnpalu.ac.id/repository/free-roblox-no-sign-in_GM431946152.pdf
    • https://library.stikeswnpalu.ac.id/repository/roblox-shirt-free-edit-avatar_GM431946152.pdf
    • https://library.stikeswnpalu.ac.id/repository/roblox-free-robux-hack-code_GM431946152.pdf
    • https://library.stikeswnpalu.ac.id/repository/give-me-robux_GM431946152.pdf
    • https://library.stikeswnpalu.ac.id/repository/how-to-hack-someones-account-on-roblox_GM431946152.pdf
    • https://library.stikeswnpalu.ac.id/repository/coin-master-rewards-2021_GM406889139.pdf
    • https://library.stikeswnpalu.ac.id/repository/roblox-cheats-for-money-on-ipad_GM431946152.pdf
    • https://library.stikeswnpalu.ac.id/repository/download-hack-coin-master-apk_GM406889139.pdf
    • https://library.stikeswnpalu.ac.id/repository/paginas-roblox-free-robuxx_GM431946152.pdf
    • https://library.stikeswnpalu.ac.id/repository/how-to-hack-coin-master-ios_GM406889139.pdf
    • https://library.stikeswnpalu.ac.id/repository/coin-master-apk-hack_GM406889139.pdf
    • https://library.stikeswnpalu.ac.id/repository/roblox-jailbreak-noclip-cheat-engine-script_GM431946152.pdf
    • https://library.stikeswnpalu.ac.id/repository/how-to-hack-roblox-to-get-robux_GM431946152.pdf
    • https://library.stikeswnpalu.ac.id/repository/free-roblox-accounts-2021-with-robux_GM431946152.pdf
    • https://library.stikeswnpalu.ac.id/repository/how-to-get-back-your-roblox-account-if-your-hacked_GM431946152.pdf
    • https://library.stikeswnpalu.ac.id/repository/free-spins-coin-master-generator_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000030bf.bin
04274f4e0ee1d4501f70f463889d4f9c3e1d94603c51a7d4fe138485ed13a409		 pdf-font-stream PDF embedded font (sfnt) at offset 0x30BF 22108 bytes
font_01_sfnt_off000061ba.bin
5e227fc62697cb3269bdd3a592c8ebb7199d78e91586905988432c1fb38acbe4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x61BA 18900 bytes

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