Malicious PDF — malware analysis report

Static analysis result for SHA-256 1b21301434116a62…

MALICIOUS

PDF

34.4 KB Created: 2021-07-04 07:45:33 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: d56cc4bb3919b75024af7c030879fd40 SHA-1: 72315b36d1be06c0153f2e46b21dd5e9266356cb SHA-256: 1b21301434116a62647099e7d5b73c6fe31166c38e64793692a7b476664688d7
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous links to external websites, many of which are structured as SEO link farms for game-related cheats and hacks. The document body and extracted URLs suggest a lure for users seeking free game items or accounts, which is a common tactic for distributing malware. The ML classifier also strongly indicated maliciousness.

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/free-roblox-accounts-2021-april-game-hack
    • http://rsudtenriawarubone.com/perpustakaan//repository/free-minecraft-client_GM479516143.pdf
    • http://rsudtenriawarubone.com/perpustakaan/repository/coin-master-hack-app-ios-download_GM406889139.pdf
    • http://rsudtenriawarubone.com/perpustakaan//repository/roblox-free-robux-codes_GM431946152.pdf
    • http://rsudtenriawarubone.com/perpustakaan/repository/oginject-co_GM406889139.pdf
    • http://rsudtenriawarubone.com/perpustakaan//repository/coin-master-hack-version-download_GM406889139.pdf
    • http://rsudtenriawarubone.com/perpustakaan//repository/do-you-get-windows-10-minecraft-for-free-with-java_GM479516143.pdf
    • http://rsudtenriawarubone.com/perpustakaan/repository/how-to-hack-a-minecraft-account_GM479516143.pdf
    • http://rsudtenriawarubone.com/perpustakaan/repository/free-robux-working_GM431946152.pdf
    • http://rsudtenriawarubone.com/perpustakaan/repository/how-to-get-free-roebucks-in-roblox_GM431946152.pdf
    • http://rsudtenriawarubone.com/perpustakaan//repository/roblox-games-with-free-vip-servers_GM431946152.pdf
    • http://rsudtenriawarubone.com/perpustakaan/repository/roblox-fire-truck-hack_GM431946152.pdf
    • http://rsudtenriawarubone.com/perpustakaan/repository/minecraft-pe-apk-download-free-015-0_GM479516143.pdf
    • http://rsudtenriawarubone.com/perpustakaan//repository/coin-master-free-spins-link-2021-today_GM406889139.pdf
    • http://rsudtenriawarubone.com/perpustakaan//repository/moonactive-coin-master-free-spins_GM406889139.pdf
    • http://rsudtenriawarubone.com/perpustakaan//repository/free-robux-with-no-verification-2021_GM431946152.pdf
    • http://rsudtenriawarubone.com/perpustakaan/repository/rbx-place-free-robux_GM431946152.pdf
    • http://rsudtenriawarubone.com/perpustakaan//repository/coin-master-free-spin-and-trading-group_GM406889139.pdf
    • http://rsudtenriawarubone.com/perpustakaan/repository/free-roblox-toy-redemtion-codes_GM431946152.pdf
    • http://rsudtenriawarubone.com/perpustakaan/repository/hack-coin-master-game-apk_GM406889139.pdf
    • http://rsudtenriawarubone.com/perpustakaan/repository/coin-master-hack-tool-ios_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002fc4.bin
05882dfff409170a197133cebc98aa6b704303a926180b19726f3acb071768ef		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2FC4 22044 bytes
font_01_sfnt_off00006069.bin
877a974a38b5ae080ea87c0c98fbc4780ff00de30da64cd6c31ec8e148c8425a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6069 19408 bytes

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