Malicious PDF — malware analysis report

Static analysis result for SHA-256 bf8dd8802eb15238…

MALICIOUS

PDF

32.8 KB Created: 2021-06-30 02:39:50 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 758db9083806cf27a144b050e0ec7c75 SHA-1: 5a2d3465aacff32b526733e26507a91f777827f4 SHA-256: bf8dd8802eb15238dd2259fa7ffbd1bccf7ad953d0791fea4e2e4b7dbbe6dcf7
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains numerous links to external websites, many of which are structured as SEO spam for terms related to Roblox cheats and free Robux. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of such links, suggesting a malicious intent to drive traffic to potentially harmful content. The ML classifier also strongly flagged this PDF as malicious. While no scripts were explicitly extracted, the presence of embedded URLs and the SEO link farm pattern strongly suggest this document is part of a phishing or malware distribution campaign, likely using embedded JavaScript to facilitate downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9824

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/irobux-robux-cheat-game-hack
    • http://pustaka.fkg.unand.ac.id/repository/codes-for-hacking-robux_GM431946152.pdf
    • http://pustaka.fkg.unand.ac.id/repository/how-to-god-yourself-in-roblox-not-hack_GM431946152.pdf
    • http://pustaka.fkg.unand.ac.id/repository/roblox-free-stuff-for-girls_GM431946152.pdf
    • http://pustaka.fkg.unand.ac.id/repository/how-to-get-free-robux-no-verification-2021-trackid-sp006_GM431946152.pdf
    • http://pustaka.fkg.unand.ac.id/repository/comment-avoir-tout-les-oblets-free-sur-roblox_GM431946152.pdf
    • http://pustaka.fkg.unand.ac.id/repository/how-to-hack-into-roblox-accounts-using-a-discord_GM431946152.pdf
    • http://pustaka.fkg.unand.ac.id/repository/how-to-get-shirts-on-roblox-for-free_GM431946152.pdf
    • http://pustaka.fkg.unand.ac.id/repository/roblox-free-online-jail-break_GM431946152.pdf
    • http://pustaka.fkg.unand.ac.id/repository/how-to-earn-free-robux-2021_GM431946152.pdf
    • http://pustaka.fkg.unand.ac.id/repository/how-to-get-free-roblox-games_GM431946152.pdf
    • http://pustaka.fkg.unand.ac.id/repository/free-robux-no-survey_GM431946152.pdf
    • http://pustaka.fkg.unand.ac.id/repository/roblox-download-free-and-fast_GM431946152.pdf
    • http://pustaka.fkg.unand.ac.id/repository/robux-gratuit-hack-facile-sans-attente_GM431946152.pdf
    • http://pustaka.fkg.unand.ac.id/repository/https-free-robux-hack_GM431946152.pdf
    • http://pustaka.fkg.unand.ac.id/repository/how-to-get-free-robux-without-spending-real-money_GM431946152.pdf
    • http://pustaka.fkg.unand.ac.id/repository/how-to-get-gamepasses-on-roblox-for-free_GM431946152.pdf
    • http://pustaka.fkg.unand.ac.id/repository/how-to-hack-assassin-on-roblox_GM431946152.pdf
    • http://pustaka.fkg.unand.ac.id/repository/roblox-synapse-exploit-free-cracked_GM431946152.pdf
    • http://pustaka.fkg.unand.ac.id/repository/roblox-r-logo-t-shirt-free_GM431946152.pdf
    • http://pustaka.fkg.unand.ac.id/repository/ww-roblox-cheat-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_off00002b07.bin
ad1abda47d8caf87b8c858e394dfd62e102fc19393d1f180a6409935f4845817		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2B07 22104 bytes
font_01_sfnt_off00005c14.bin
5d8d052cd7bf03c63f1b6f5dcfbdb2997192106f5baa98c23a55465d36de0290		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5C14 18820 bytes

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