Malicious PDF — malware analysis report

Static analysis result for SHA-256 fcae4bc801f6b94d…

MALICIOUS

PDF

33.5 KB Created: 2021-07-04 05:12:21 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 7d015cca85329a7099374ef33fb45bb6 SHA-1: 74266b52624dce7c13c93097f54f7231c3988cbd SHA-256: fcae4bc801f6b94d6b5022a36e62300a836b7ed72c3d5a640ee2296dfcd15bc9
102 Risk Score

Malware Insights

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

The PDF document contains numerous embedded links, many of which are part of a link farm designed to direct users to sites offering game hacks and cheats. The ML classifier and the PDF_SEO_LINK_FARM heuristic strongly indicate malicious intent. The document's primary function appears to be a lure to download potentially harmful files from the listed URLs.

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/scary-larry-roblox-game-hack
    • http://dev.pmrscambodia.org/images/uploadfiles/hack-game-coin-master_GM406889139.pdf
    • http://dev.pmrscambodia.org/images/uploadfiles/how-to-get-free-robux-hack_GM431946152.pdf
    • http://dev.pmrscambodia.org/images/uploadfiles/robux-hack-working-2021_GM431946152.pdf
    • http://dev.pmrscambodia.org/images/uploadfiles/coin-master-free-spin-and-coin-links_GM406889139.pdf
    • http://dev.pmrscambodia.org/images/uploadfiles/free-robux-mod-roblox_GM431946152.pdf
    • http://dev.pmrscambodia.org/images/uploadfiles/coin-master-unlimited-spin-hack-apk_GM406889139.pdf
    • http://dev.pmrscambodia.org/images/uploadfiles/coin-master-free-link-spin_GM406889139.pdf
    • http://dev.pmrscambodia.org/images/uploadfiles/minecraft-dungeons-free-download-pc_GM479516143.pdf
    • http://dev.pmrscambodia.org/images/uploadfiles/free-robux-websites-no-human-verification_GM431946152.pdf
    • http://dev.pmrscambodia.org/images/uploadfiles/coin-master-free-spins-youthnow_GM406889139.pdf
    • http://dev.pmrscambodia.org/images/uploadfiles/ultimate-random-night-how-to-hack-roblox_GM431946152.pdf
    • http://dev.pmrscambodia.org/images/uploadfiles/free-spin-link_GM406889139.pdf
    • http://dev.pmrscambodia.org/images/uploadfiles/roblox-game-free-download_GM431946152.pdf
    • http://dev.pmrscambodia.org/images/uploadfiles/how-to-noclip-roblox-with-cheat-engine_GM431946152.pdf
    • http://dev.pmrscambodia.org/images/uploadfiles/freer-tiktok_GM835599320.pdf
    • http://dev.pmrscambodia.org/images/uploadfiles/coin-master-free-spins-link-blogspot-2021_GM406889139.pdf
    • http://dev.pmrscambodia.org/images/uploadfiles/coin-master-400-spin-link_GM406889139.pdf
    • http://dev.pmrscambodia.org/images/uploadfiles/play-roblox-for-free-on-google_GM431946152.pdf
    • http://dev.pmrscambodia.org/images/uploadfiles/free-spins-coin-master-site-wwwquoracom_GM406889139.pdf
    • http://dev.pmrscambodia.org/images/uploadfiles/coin-master-free-spins-link-2021_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002d1e.bin
3a6582ab27720bf9211ff7c9b97af0582f44f4614f53be459eff9ef9a516a171		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2D1E 22436 bytes
font_01_sfnt_off00005ee0.bin
b25a534296075f7bcdc7d208e3295736962a1ae35fe22db08908c3a21747a7bc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5EE0 18668 bytes

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