Malicious PDF — malware analysis report

Static analysis result for SHA-256 1ba4ca6c314d428e…

MALICIOUS

PDF

34.8 KB Created: 2021-06-29 21:41:33 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: ec3f8bcaea1b4a4096469da24afd18f3 SHA-1: e207b079476f243e847cbf67a18196311c91096a SHA-256: 1ba4ca6c314d428eeed501294857ee75cc2069f8421ab8488a762b6e5debfb16
102 Risk Score

Malware Insights

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

This PDF document contains a large number of embedded links, many of which are structured as SEO-optimized PDF gateways pointing to game-related cheats and hacks. The primary URL, http://netcdn.co/app/431946152/www-roblox-com-free-game-hack, likely serves as a landing page or download source for a secondary payload. The ML classifier strongly indicated maliciousness, and the overall structure suggests a phishing or malware distribution attempt.

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/www-roblox-com-free-game-hack
    • https://lib-stie.yai.ac.id/repository/how-to-get-free-robux-no-verification_GM431946152.pdf
    • https://lib-stie.yai.ac.id/repository/free-minecraft-java-account_GM479516143.pdf
    • https://lib-stie.yai.ac.id/repository/roblox-free-robux-no-verification_GM431946152.pdf
    • https://lib-stie.yai.ac.id/repository/roblox-hack-download-pc_GM431946152.pdf
    • https://lib-stie.yai.ac.id/repository/how-to-hack-into-roblox-account-with-method_GM431946152.pdf
    • https://lib-stie.yai.ac.id/repository/roblox-robot-animation-free_GM431946152.pdf
    • https://lib-stie.yai.ac.id/repository/roblox-how-to-buy-stuff-for-free_GM431946152.pdf
    • https://lib-stie.yai.ac.id/repository/coin-master-free-cards-link_GM406889139.pdf
    • https://lib-stie.yai.ac.id/repository/minecraft-free-android_GM479516143.pdf
    • https://lib-stie.yai.ac.id/repository/how-to-get-robux-easy_GM431946152.pdf
    • https://lib-stie.yai.ac.id/repository/earn-free-robux-today_GM431946152.pdf
    • https://lib-stie.yai.ac.id/repository/instaler-un-cheat-pour-roblox-phamtom-forces_GM431946152.pdf
    • https://lib-stie.yai.ac.id/repository/how-to-hack-roblox-if-u-forgoten-your-password_GM431946152.pdf
    • https://lib-stie.yai.ac.id/repository/how-to-get-creative-mode-in-minecraft-server-hack_GM479516143.pdf
    • https://lib-stie.yai.ac.id/repository/coin-master-free-coins-and-spins_GM406889139.pdf
    • https://lib-stie.yai.ac.id/repository/pokemon-go-free-7km-eggs-june-2021_GM1094591345.pdf
    • https://lib-stie.yai.ac.id/repository/dragon-ball-rage-cheats-roblox_GM431946152.pdf
    • https://lib-stie.yai.ac.id/repository/s303-roblox-hack_GM431946152.pdf
    • https://lib-stie.yai.ac.id/repository/roblox-download-apk-hack_GM431946152.pdf
    • https://lib-stie.yai.ac.id/repository/how-to-get-free-robux-no-human-verification-2021_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002e85.bin
ae63ba80009b7a8f6a20936ac621928cb6a723b292e1cb901d3a1ad4c5d62ab5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2E85 23216 bytes
font_01_sfnt_off0000624f.bin
5b3091f30fedee9bec1e498d61d7d3798f23fbaf83d5cf1d04dc99657de4f1e7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x624F 19272 bytes

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