Malicious PDF — malware analysis report

Static analysis result for SHA-256 43bcffddd6fc0342…

MALICIOUS

PDF

35.7 KB Created: 2021-06-27 05:19:28 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 0033bfe0e0ce06c4d42b331b1601e859 SHA-1: 567118ea2cc340c28f798706b1864641556dd943 SHA-256: 43bcffddd6fc034249610613334351eca2764cc183aa900f41c3c271fb8a7ce3
102 Risk Score

Malware Insights

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

The PDF document contains numerous embedded links and a document body that promotes free game hacks and cheats, aiming to trick users into downloading malicious files. The ML classifier and the PDF link farm heuristic strongly indicate malicious intent, likely serving as a lure for malware distribution.

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/roblox-determined-7-hack-game-hack
    • http://royalindianjourney.co.in/uploaded_files/userfiles/files/june-29-coin-master-hack-no-human-verification_GM406889139.pdf
    • http://royalindianjourney.co.in/uploaded_files/userfiles/files/roblox-counter-blox-free-skins_GM431946152.pdf
    • http://royalindianjourney.co.in/uploaded_files/userfiles/files/roblox-free-robux-website_GM431946152.pdf
    • http://royalindianjourney.co.in/uploaded_files/userfiles/files/free-robux-real_GM431946152.pdf
    • http://royalindianjourney.co.in/uploaded_files/userfiles/files/4-step-way-to-get-free-robux-2021_GM431946152.pdf
    • http://royalindianjourney.co.in/uploaded_files/userfiles/files/free-app-rewards-robux_GM431946152.pdf
    • http://royalindianjourney.co.in/uploaded_files/userfiles/files/free-robux-download-app-verification-hack_GM431946152.pdf
    • http://royalindianjourney.co.in/uploaded_files/userfiles/files/coin-master-hack-version-ios_GM406889139.pdf
    • http://royalindianjourney.co.in/uploaded_files/userfiles/files/robux-come_GM431946152.pdf
    • http://royalindianjourney.co.in/uploaded_files/userfiles/files/free-robux-apps-that-work_GM431946152.pdf
    • http://royalindianjourney.co.in/uploaded_files/userfiles/files/coin-master-free-spins-1-coin-master_GM406889139.pdf
    • http://royalindianjourney.co.in/uploaded_files/userfiles/files/how-to-get-free-robux-on-roblox_GM431946152.pdf
    • http://royalindianjourney.co.in/uploaded_files/userfiles/files/how-to-hack-roblox-on-mobile_GM431946152.pdf
    • http://royalindianjourney.co.in/uploaded_files/userfiles/files/how-to-hack-in-arsenal_GM431946152.pdf
    • http://royalindianjourney.co.in/uploaded_files/userfiles/files/download-cheats-for-roblox_GM431946152.pdf
    • http://royalindianjourney.co.in/uploaded_files/userfiles/files/coin-master-free-spins-bit-ly_GM406889139.pdf
    • http://royalindianjourney.co.in/uploaded_files/userfiles/files/300-daily-free-spins-coin-master_GM406889139.pdf
    • http://royalindianjourney.co.in/uploaded_files/userfiles/files/generate-robux-for-free-without-downloading-games_GM431946152.pdf
    • http://royalindianjourney.co.in/uploaded_files/userfiles/files/can-i-get-roblox-for-free_GM431946152.pdf
    • http://royalindianjourney.co.in/uploaded_files/userfiles/files/tiktok-free-or-paid_GM835599320.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00003339.bin
513ed22fd86ec8c1417e9305c775419f1414a7552378cfba08c22aa8e2af3644		 pdf-font-stream PDF embedded font (sfnt) at offset 0x3339 22472 bytes
font_01_sfnt_off0000650a.bin
7eb70d27212b1efffb100c5e653411594599aaf3d997aff0bdca89249976d4d2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x650A 19540 bytes

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