Malicious PDF — malware analysis report

Static analysis result for SHA-256 d7a17b263f04c103…

MALICIOUS

PDF

35.6 KB Created: 2021-06-29 20:38:42 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 29789d6fc41ed8919c6a2c0ceb05e7fc SHA-1: 47e839a5184d212212ee6534293c08b1f50cb231 SHA-256: d7a17b263f04c10369f15a1589c1242ea49db7624b6ebdeaa6e803e8f41b10b6
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 link farms. The document body and embedded URLs suggest a lure for free Robux, a common tactic for distributing malware. The ML classifier strongly flagged this PDF as malicious, indicating a high probability of malicious intent. No scripts were extracted, but the presence of many external links points towards a downloader or redirector.

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/robux-code-2021-free-game-game-hack
    • http://pustaka.ust.ac.id/repository/how-do-i-get-free-robux-on-roblox_GM431946152.pdf
    • http://pustaka.ust.ac.id/repository/welcome-to-rbxnow-earn-free-robux_GM431946152.pdf
    • http://pustaka.ust.ac.id/repository/outlook-team-hack-roblox_GM431946152.pdf
    • http://pustaka.ust.ac.id/repository/roblox-hack-online-unlimited-robux_GM431946152.pdf
    • http://pustaka.ust.ac.id/repository/free-limiteds-roblox_GM431946152.pdf
    • http://pustaka.ust.ac.id/repository/robux-hack-me_GM431946152.pdf
    • http://pustaka.ust.ac.id/repository/how-to-make-a-free-thumbnail-on-roblox_GM431946152.pdf
    • http://pustaka.ust.ac.id/repository/how-to-hack-roblox-2021-december_GM431946152.pdf
    • http://pustaka.ust.ac.id/repository/get-robux-free-no-survey-waiting_GM431946152.pdf
    • http://pustaka.ust.ac.id/repository/how-to-hack-persons-account-on-roblox_GM431946152.pdf
    • http://pustaka.ust.ac.id/repository/free-rpg-roblox-items_GM431946152.pdf
    • http://pustaka.ust.ac.id/repository/robux-genorater-no-human-varification-no-survey-no-hack_GM431946152.pdf
    • http://pustaka.ust.ac.id/repository/how-to-make-a-hacker-outfit-on-roblox_GM431946152.pdf
    • http://pustaka.ust.ac.id/repository/how-to-get-free-robux-hack_GM431946152.pdf
    • http://pustaka.ust.ac.id/repository/roblox-dll-cheat_GM431946152.pdf
    • http://pustaka.ust.ac.id/repository/hacks-to-get-free-robux_GM431946152.pdf
    • http://pustaka.ust.ac.id/repository/free-roblox-money-codes-2021_GM431946152.pdf
    • http://pustaka.ust.ac.id/repository/free-robux-no-verification-no-survey_GM431946152.pdf
    • http://pustaka.ust.ac.id/repository/http-bitly-coin-master-free-2021-spins_GM406889139.pdf
    • http://pustaka.ust.ac.id/repository/roblox-hack-tool-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_off000031a9.bin
de44f338b945f8c356928e13deda9cbb817f0989ed37721a4ad26f2e9a7b31e5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x31A9 22712 bytes
font_01_sfnt_off000064c1.bin
3f8f44e0cdbba64e3f5ce88ac6fa277ea149cb42d87e73a9ba6179e52464acd0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x64C1 19552 bytes

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