Malicious PDF — malware analysis report

Static analysis result for SHA-256 e4d1fbaf6497ee2c…

MALICIOUS

PDF

34.4 KB Created: 2021-07-04 19:15:45 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 31d4d801e0b2c292653fae1d914e33cf SHA-1: 8d2d343bdf4a1aa9b81b4c3b098fd874fb2dfac6 SHA-256: e4d1fbaf6497ee2c81b469696d76a48755ad6f8aeefb6c4765e4c1e916c13b16
102 Risk Score

Malware Insights

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

The PDF document contains numerous links to external websites, many of which are hosted on suspicious domains and appear to be part of a link farm. The document body and extracted URLs suggest a lure for users seeking game hacks or cheats, likely leading to malware download or phishing. The ML classifier strongly supports the malicious nature of this PDF.

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/roblox-arsenal-hack-game-hack
    • http://www.perpustakaan.unda.ac.id/repository/free-spin-and-coin-blogspot-com_GM406889139.pdf
    • http://www.perpustakaan.unda.ac.id/repository/free-roblox-hack-logiciel_GM431946152.pdf
    • http://www.perpustakaan.unda.ac.id/repository/change-your-birthday-to-this-date-for-free-robux_GM431946152.pdf
    • http://www.perpustakaan.unda.ac.id/repository/how-to-hack-on-vehicle-sim-roblox_GM431946152.pdf
    • http://www.perpustakaan.unda.ac.id/repository/how-inspect-and-hack-in-roblox_GM431946152.pdf
    • http://www.perpustakaan.unda.ac.id/repository/coin-master-play-online-free_GM406889139.pdf
    • http://www.perpustakaan.unda.ac.id/repository/roblox-mod-hack-robux_GM431946152.pdf
    • http://www.perpustakaan.unda.ac.id/repository/coin-master-spin-hack-without-verification_GM406889139.pdf
    • http://www.perpustakaan.unda.ac.id/repository/www-free-robux-com_GM431946152.pdf
    • http://www.perpustakaan.unda.ac.id//repository/how-to-change-roblox-username-for-free-2021_GM431946152.pdf
    • http://www.perpustakaan.unda.ac.id//repository/coin-master-gift-hack_GM406889139.pdf
    • http://www.perpustakaan.unda.ac.id//repository/coin-master-hack-mod-apk_GM406889139.pdf
    • http://www.perpustakaan.unda.ac.id/repository/inappropriate-roblox_GM431946152.pdf
    • http://www.perpustakaan.unda.ac.id/repository/free-roblox-accounts-2021-july_GM431946152.pdf
    • http://www.perpustakaan.unda.ac.id/repository/hacks-tool-roblox_GM431946152.pdf
    • http://www.perpustakaan.unda.ac.id//repository/minecraft-pe-hack-client-ios_GM479516143.pdf
    • http://www.perpustakaan.unda.ac.id/repository/free-spin-coin-master-new-link_GM406889139.pdf
    • http://www.perpustakaan.unda.ac.id/repository/how-to-get-free-robux-promotion-link_GM431946152.pdf
    • http://www.perpustakaan.unda.ac.id/repository/how-to-hack-2-step-verification-roblox_GM431946152.pdf
    • http://www.perpustakaan.unda.ac.id/repository/how-do-you-earn-robux-on-roblox_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002efd.bin
1aa94ed37c45bd36cec09a3bcbde33d042f5805cf4049b4056b5071fb28f23bd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2EFD 22872 bytes
font_01_sfnt_off00006265.bin
2a9da7e207da7f151e9dc698eb3be8a302bb8ec18d8a029c2d8305e65e62f0f4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6265 18656 bytes

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