Malicious PDF — malware analysis report

Static analysis result for SHA-256 d286683528d56604…

MALICIOUS

PDF

44.1 KB Created: 2021-05-17 21:09:48 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: ba5764ab488be2d9e5cd66562673b26b SHA-1: a9d63c85cb81ece98ab79baf83a65eefbcdd0381 SHA-256: d286683528d56604306876726bfa66f9a05bf5a9b4551e254ac404e943b4304a
102 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which are structured as a link farm pointing to game-related cheat and hack PDFs. The document body also contains a direct URL to a file hosted on netcdn.xyz, suggesting a lure to download potentially malicious content. The ML classifier strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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 https://netcdn.xyz/app/431946152/free-roblox-hair-to-wear-game-hack
    • http://www.lorengindonesia.com/new/public/ckfinder/userfiles/files/roblox-www-com_GM431946152.pdf
    • http://www.lorengindonesia.com/new/public/ckfinder/userfiles/files/how-to-download-minecraft-for-free-on-your-phone_GM479516143.pdf
    • http://www.lorengindonesia.com/new/public/ckfinder/userfiles/files/roblox-got-talent-piano-hack_GM431946152.pdf
    • http://www.lorengindonesia.com/new/public/ckfinder/userfiles/files/coin-master-free-spin-today-2021_GM406889139.pdf
    • http://www.lorengindonesia.com/new/public/ckfinder/userfiles/files/smart-lodhi-coin-master-hack_GM406889139.pdf
    • http://www.lorengindonesia.com/new/public/ckfinder/userfiles/files/coin-master-hack-apk-download_GM406889139.pdf
    • http://www.lorengindonesia.com/new/public/ckfinder/userfiles/files/how-to-get-free-roblox-money_GM431946152.pdf
    • http://www.lorengindonesia.com/new/public/ckfinder/userfiles/files/comapp-trekfree-coin-spindaily-link-master_GM406889139.pdf
    • http://www.lorengindonesia.com/new/public/ckfinder/userfiles/files/coin-master-free-spins-link-2021-march_GM406889139.pdf
    • http://www.lorengindonesia.com/new/public/ckfinder/userfiles/files/coin-master-hack-tool-2021_GM406889139.pdf
    • http://www.lorengindonesia.com/new/public/ckfinder/userfiles/files/coin-master-free-spin-and-coins-links-2021_GM406889139.pdf
    • http://www.lorengindonesia.com/new/public/ckfinder/userfiles/files/coin-master-hack-download-ios_GM406889139.pdf
    • http://www.lorengindonesia.com/new/public/ckfinder/userfiles/files/roblox-hackprogamers-com_GM431946152.pdf
    • http://www.lorengindonesia.com/new/public/ckfinder/userfiles/files/roblox-free-robux-hack_GM431946152.pdf
    • http://www.lorengindonesia.com/new/public/ckfinder/userfiles/files/coin-master-latest-mod-apk-free-download_GM406889139.pdf
    • http://www.lorengindonesia.com/new/public/ckfinder/userfiles/files/free-robux-today_GM431946152.pdf
    • http://www.lorengindonesia.com/new/public/ckfinder/userfiles/files/coin-master-hack-without-human-verification_GM406889139.pdf
    • http://www.lorengindonesia.com/new/public/ckfinder/userfiles/files/coin-master-daily-free-spins-link-today_GM406889139.pdf
    • http://www.lorengindonesia.com/new/public/ckfinder/userfiles/files/free-online-games-like-minecraft_GM479516143.pdf
    • http://www.lorengindonesia.com/new/public/ckfinder/userfiles/files/www-coin-master-hack-com_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off000049fb.bin
93213233ee6c18e2e615731f6c84e958e5df33217bac842e90c59a7b83f622ab		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x49FB 28328 bytes
font_01_sfnt_off00008999.bin
adf075a740c6f928a3b94d4aeef99adcd15710aa40e26859f6513b600edf11fb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8999 18496 bytes

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