Malicious PDF — malware analysis report

Static analysis result for SHA-256 6cce0fbdfac2b371…

MALICIOUS

PDF

35.2 KB Created: 2021-06-26 08:17:01 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 919865527f8101367b8ffa8857c80cbe SHA-1: 145566012b87dc729d3739c80699c493c4d7c21a SHA-256: 6cce0fbdfac2b371c49ff69a7c99444a1fc8b52667045563ca1d3242a636eecb
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document contains a large number of external links, many of which are SEO-optimized and point to pages offering cheats or generators for popular games. The ML classifier also flagged this PDF as malicious with high confidence. The document body and extracted URLs suggest a lure to trick users into visiting malicious sites, likely to download further malware or engage in scams.

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-robux-generator-free-robux-in-roblox-game-hack
    • https://www.ktcart.co.in/uploaded_files/userfiles/files/coin-master-free-spin-codes_GM406889139.pdf
    • https://www.ktcart.co.in/uploaded_files/userfiles/files/mcpe-master-coins-hack_GM406889139.pdf
    • https://www.ktcart.co.in/uploaded_files/userfiles/files/get-free-spins-on-coin-master_GM406889139.pdf
    • https://www.ktcart.co.in/uploaded_files/userfiles/files/free-spins-coin-master_GM406889139.pdf
    • https://www.ktcart.co.in/uploaded_files/userfiles/files/free-texture-packs-for-minecraft-pe_GM479516143.pdf
    • https://www.ktcart.co.in/uploaded_files/userfiles/files/earn-robux-gg-earn-free-robux-for-roblox_GM431946152.pdf
    • https://www.ktcart.co.in/uploaded_files/userfiles/files/how-to-get-free-robux-not-a-scam_GM431946152.pdf
    • https://www.ktcart.co.in/uploaded_files/userfiles/files/coin-master-70-spin-link_GM406889139.pdf
    • https://www.ktcart.co.in/uploaded_files/userfiles/files/roblox-walk-through-walls-hack-2021_GM431946152.pdf
    • https://www.ktcart.co.in/uploaded_files/userfiles/files/how-to-hack-roblox-accounts-2021_GM431946152.pdf
    • https://www.ktcart.co.in/uploaded_files/userfiles/files/coin-master-hack-progamers_GM406889139.pdf
    • https://www.ktcart.co.in/uploaded_files/userfiles/files/roblox-hack-com_GM431946152.pdf
    • https://www.ktcart.co.in/uploaded_files/userfiles/files/free-robux-promo-codes_GM431946152.pdf
    • https://www.ktcart.co.in/uploaded_files/userfiles/files/coin-master-free-spins-and-coins_GM406889139.pdf
    • https://www.ktcart.co.in/uploaded_files/userfiles/files/roblox-adopt-me-hacks-2021_GM431946152.pdf
    • https://www.ktcart.co.in/uploaded_files/userfiles/files/inject-hack-roblox-buides-club_GM431946152.pdf
    • https://www.ktcart.co.in/uploaded_files/userfiles/files/when-is-john-doe-going-to-hack-roblox_GM431946152.pdf
    • https://www.ktcart.co.in/uploaded_files/userfiles/files/free-coin-master-spins-blog_GM406889139.pdf
    • https://www.ktcart.co.in/uploaded_files/userfiles/files/free-spins-coin-master-links-2021_GM406889139.pdf
    • https://www.ktcart.co.in/uploaded_files/userfiles/files/games-on-roblox-that-give-you-free-robux_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000335f.bin
38e77e80778f0c4c3bd096c1b3a6ea7f84a332f953adf96d6abf5f3031103169
pdf-font-stream PDF embedded font (sfnt) at offset 0x335F 22272 bytes
font_01_sfnt_off00006500.bin
c20f2e5b60232e8ca12f14d4060cd3f6453e37cbdf43ff7f55762dacc959384d
pdf-font-stream PDF embedded font (sfnt) at offset 0x6500 18896 bytes