Malicious PDF — malware analysis report

Static analysis result for SHA-256 d615eae3b0b6de15…

MALICIOUS

PDF

35.1 KB Created: 2021-07-07 02:45:27 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: e8ae07eca3dc317ac8d048f97674495b SHA-1: ae0fde868b8af89a2d16b02f2a9231ecd45debe3 SHA-256: d615eae3b0b6de15f915aefa858296d6191c6c7c500171d734a65d3e0d3ea7c0
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 SEO-optimized PDFs promising free Robux or game hacks. The document body and extracted URLs suggest a lure for users to download potentially malicious content. The ML classifier strongly flagged this PDF as malicious, and the presence of a link farm indicates a high likelihood of malicious intent.

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-robux-generator-no-survey-game-hack
    • http://inforplace.com.br/ckfinder/userfiles/files/how-to-get-free-robux-instantly_GM431946152.pdf
    • http://inforplace.com.br/ckfinder/userfiles/files/roblox-lumber-tycoon-2-how-to-get-money-hack-ccv7_GM431946152.pdf
    • http://inforplace.com.br/ckfinder/userfiles/files/free-robux-codes-no-verification-2021_GM431946152.pdf
    • http://inforplace.com.br/ckfinder/userfiles/files/how-can-i-get-free-robux_GM431946152.pdf
    • http://inforplace.com.br/ckfinder/userfiles/files/half-hacker-half-guest-roblox_GM431946152.pdf
    • http://inforplace.com.br/ckfinder/userfiles/files/roblox-noclip-download-hack_GM431946152.pdf
    • http://inforplace.com.br/ckfinder/userfiles/files/coin-master-daily-gift-free-spins-and-coins-link_GM406889139.pdf
    • http://inforplace.com.br/ckfinder/userfiles/files/free-minecraft-java-edition-codes_GM479516143.pdf
    • http://inforplace.com.br/ckfinder/userfiles/files/get4mobilebiz-free-robux_GM431946152.pdf
    • http://inforplace.com.br/ckfinder/userfiles/files/roblox-hacker-kolorowanki-do-druku_GM431946152.pdf
    • http://inforplace.com.br/ckfinder/userfiles/files/free-robux-accounts-2021_GM431946152.pdf
    • http://inforplace.com.br/ckfinder/userfiles/files/how-to-roblox-noclip-hack-2021_GM431946152.pdf
    • http://inforplace.com.br/ckfinder/userfiles/files/get-minecraft-windows-10-free_GM479516143.pdf
    • http://inforplace.com.br/ckfinder/userfiles/files/how-to-get-free-robux-no-scam_GM431946152.pdf
    • http://inforplace.com.br/ckfinder/userfiles/files/free-roblox-account-2021-december_GM431946152.pdf
    • http://inforplace.com.br/ckfinder/userfiles/files/can-you-give-me-free-robux_GM431946152.pdf
    • http://inforplace.com.br/ckfinder/userfiles/files/getrobux-info_GM431946152.pdf
    • http://inforplace.com.br/ckfinder/userfiles/files/coin-master-villages_GM406889139.pdf
    • http://inforplace.com.br/ckfinder/userfiles/files/free-robux-offers_GM431946152.pdf
    • http://inforplace.com.br/ckfinder/userfiles/files/minecraft-free-version-pc_GM479516143.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000030d6.bin
2ba8cd91512d5eeebceee7bda2c0a30fae9ad0b880c0c04236691c365a499c32
pdf-font-stream PDF embedded font (sfnt) at offset 0x30D6 22816 bytes
font_01_sfnt_off00006401.bin
33dfcb2d47e73eef9736d676cbbc8a7ec86e5e18ee4675d0e02e08c00d2a765b
pdf-font-stream PDF embedded font (sfnt) at offset 0x6401 19112 bytes