Malicious PDF — malware analysis report

Static analysis result for SHA-256 c8ace8dc56420e6c…

MALICIOUS

PDF

33.9 KB Created: 2021-06-18 17:47:32 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 2002f9ba4a52a12113cce4818ae0f8cf SHA-1: d1e2620e4658b22025bc49aee9298a5f967c3dbe SHA-256: c8ace8dc56420e6c5000a64da48283f8e2d0e52db01d0fad351190eb808ccc45
102 Risk Score

Malware Insights

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

The PDF document contains numerous embedded links and a primary URL pointing to game-related cheats and hacks, indicating a lure for users to download potentially malicious files. The heuristic findings confirm the presence of a large number of external links, suggesting a link farm designed to distribute malware or lead users to phishing sites. The ML classifier also strongly flagged this PDF as malicious.

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/roblox-vehical-cheats-game-hack PDF link annotation
    • https://www.cgalgeria-dubai.com/userfiles/files/coin-master-hack-pro-gamers-com_GM406889139.pdfIn PDF document text
    • https://www.cgalgeria-dubai.com/userfiles/files/how-to-get-free-robux-app_GM431946152.pdfIn PDF document text
    • https://www.cgalgeria-dubai.com/userfiles/files/how-to-hack-to-get-robux_GM431946152.pdfIn PDF document text
    • https://www.cgalgeria-dubai.com/userfiles/files/add-robux_GM431946152.pdfIn PDF document text
    • https://www.cgalgeria-dubai.com/userfiles/files/www-roblox-com-free-robux_GM431946152.pdfIn PDF document text
    • https://www.cgalgeria-dubai.com/userfiles/files/coin-master-links-free-spins_GM406889139.pdfIn PDF document text
    • https://www.cgalgeria-dubai.com/userfiles/files/how-to-download-minecraft-for-free-on-mac_GM479516143.pdfIn PDF document text
    • https://www.cgalgeria-dubai.com/userfiles/files/free-minecraft-survival-server_GM479516143.pdfIn PDF document text
    • https://www.cgalgeria-dubai.com/userfiles/files/coin-master-daily-spins_GM406889139.pdfIn PDF document text
    • https://www.cgalgeria-dubai.com/userfiles/files/ways-to-get-robux_GM431946152.pdfIn PDF document text
    • https://www.cgalgeria-dubai.com/userfiles/files/free-minecraft-alts_GM479516143.pdfIn PDF document text
    • https://www.cgalgeria-dubai.com/userfiles/files/apps-to-get-minecraft-for-free_GM479516143.pdfIn PDF document text
    • https://www.cgalgeria-dubai.com/userfiles/files/coin-master-game-hack-link_GM406889139.pdfIn PDF document text
    • https://www.cgalgeria-dubai.com/userfiles/files/how-to-get-free-minecraft-windows-10_GM479516143.pdfIn PDF document text
    • https://www.cgalgeria-dubai.com/userfiles/files/how-to-get-robux-on-roblox_GM431946152.pdfIn PDF document text
    • https://www.cgalgeria-dubai.com/userfiles/files/www-bandicam-com-free-robux_GM431946152.pdfIn PDF document text
    • https://www.cgalgeria-dubai.com/userfiles/files/getrobux-now_GM431946152.pdfIn PDF document text
    • https://www.cgalgeria-dubai.com/userfiles/files/how-to-get-free-food-on-coin-master_GM406889139.pdfIn PDF document text
    • https://www.cgalgeria-dubai.com/userfiles/files/promo-codes-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://www.cgalgeria-dubai.com/userfiles/files/free-robux-codes-generator-no-verification_GM431946152.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_off00002ed6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2ED6 21924 bytes
SHA-256: e820a0b6f93750c3165d37d1ed8b2f94200db235d0ce49b10fdcc53852711a57
font_01_sfnt_off00005f65.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F65 19008 bytes
SHA-256: 7041b68a9d00bcf1d58428fb2f37e757de3d2504bb751d7e7cb2d1abd1636a09

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