Malicious PDF — malware analysis report

Static analysis result for SHA-256 eaee6b3ae5c9bdfd…

MALICIOUS

PDF

34.9 KB Created: 2021-07-01 14:27:39 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-16
MD5: fcfbf79bbfd43b330236910a3cc8947a SHA-1: ec3fa33c2f8cdfd45be91a11ae971b8557b03569 SHA-256: eaee6b3ae5c9bdfddf3f4f80a01722288f1ca047c545f9b754cdc61493fd16bd
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 SEO-optimized PDFs, suggesting a link farm designed to drive traffic. The primary URL, http://netcdn.co/app/431946152/get-free-robux-without-getting-apps-game-hack, combined with the document body's lure of 'Get Free Robux', indicates a social engineering attempt to trick users into downloading a malicious application. 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.co/app/431946152/get-free-robux-without-getting-apps-game-hack PDF link annotation
    • https://www.lincolnec.edu.np/userfiles/files/www-bandicam-com-free-robux_GM431946152.pdfIn PDF document text
    • https://www.lincolnec.edu.np/userfiles/files/how-to-hack-a-roblox-account-2021_GM431946152.pdfIn PDF document text
    • https://www.lincolnec.edu.np/userfiles/files/roblox-how-to-be-a-nerd-no-robux-or-hacks_GM431946152.pdfIn PDF document text
    • https://www.lincolnec.edu.np/userfiles/files/plug-toolbox-for-minecraft-free-ios_GM479516143.pdfIn PDF document text
    • https://www.lincolnec.edu.np/userfiles/files/free-mod-apk-coin-master_GM406889139.pdfIn PDF document text
    • https://www.lincolnec.edu.np/userfiles/files/100-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://www.lincolnec.edu.np/userfiles/files/how-to-get-free-robux-in-roblox-2021-nicktherobloxiantv_GM431946152.pdfIn PDF document text
    • https://www.lincolnec.edu.np/userfiles/files/free-robux-we-are-devs_GM431946152.pdfIn PDF document text
    • https://www.lincolnec.edu.np/userfiles/files/how-to-hack-robux_GM431946152.pdfIn PDF document text
    • https://www.lincolnec.edu.np/userfiles/files/blogspot-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • https://www.lincolnec.edu.np/userfiles/files/how-to-hack-in-nba-phenom-roblox_GM431946152.pdfIn PDF document text
    • https://www.lincolnec.edu.np/userfiles/files/how-to-make-a-modded-minecraft-server-for-free_GM479516143.pdfIn PDF document text
    • https://www.lincolnec.edu.np/userfiles/files/master-coin-master-free-spin_GM406889139.pdfIn PDF document text
    • https://www.lincolnec.edu.np/userfiles/files/free-robux-sights_GM431946152.pdfIn PDF document text
    • https://www.lincolnec.edu.np/userfiles/files/roblox-free-robux-hack_GM431946152.pdfIn PDF document text
    • https://www.lincolnec.edu.np/userfiles/files/free-robux-pin-codes_GM431946152.pdfIn PDF document text
    • https://www.lincolnec.edu.np/userfiles/files/free-coin-and-spin-link_GM406889139.pdfIn PDF document text
    • https://www.lincolnec.edu.np/userfiles/files/coin-master-free-spin-reward-links_GM406889139.pdfIn PDF document text
    • https://www.lincolnec.edu.np/userfiles/files/free-robux-nordvpn_GM431946152.pdfIn PDF document text
    • https://www.lincolnec.edu.np/userfiles/files/how-to-hack-mcpe-master-coins_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000030cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x30CC 22192 bytes
SHA-256: cd760047f73b4bffadc3e46b4ae788a186a30c4906465e92702dafee7cf13303
font_01_sfnt_off00006221.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6221 19480 bytes
SHA-256: 1808147bb209ae623e49d1aedc304aae2f928e30c79247a9efef54168268dc8b

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