Malicious PDF — malware analysis report

Static analysis result for SHA-256 3c4d00ab27d749bf…

MALICIOUS

PDF

42.5 KB Created: 2021-05-14 13:19:33 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 0922f2cf85213e17783036fad5029244 SHA-1: c86a8467bff7c2253fa44e52c0a770edeb52dbed SHA-256: 3c4d00ab27d749bf704234875c2090f7a99a6736ca13af247cf373202eb3d190
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of external links, many of which are SEO-optimized and point to websites offering game hacks and cheats. The ML classifier strongly indicated maliciousness, and the presence of a "download button" heuristic suggests a lure to click these links. The primary goal appears to be directing users to potentially malicious or scam-related websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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/bux-gg-robux-free-game-hack
    • http://www.riverkennet.org/uploads/files/files/coin-master-free-spins-hack-link_GM406889139.pdf
    • http://www.riverkennet.org/uploads/files/files/coin-master-fan-page-free-spins_GM406889139.pdf
    • http://www.riverkennet.org/uploads/files/files/coin-master-free-spins-2021-apk_GM406889139.pdf
    • http://www.riverkennet.org/uploads/files/files/hack-the-coin-master_GM406889139.pdf
    • http://www.riverkennet.org/uploads/files/files/rbl-gg-free-robux_GM431946152.pdf
    • http://www.riverkennet.org/uploads/files/files/www-roblox-com-free-robux_GM431946152.pdf
    • http://www.riverkennet.org/uploads/files/files/coin-master-free-spins-uk_GM406889139.pdf
    • http://www.riverkennet.org/uploads/files/files/coin-master-free-spins-hack-no-human-verification_GM406889139.pdf
    • http://www.riverkennet.org/uploads/files/files/www-claim-gg-to-earn-free-robux_GM431946152.pdf
    • http://www.riverkennet.org/uploads/files/files/hack-coin-master-32-mod-apk_GM406889139.pdf
    • http://www.riverkennet.org/uploads/files/files/free-robux-offers_GM431946152.pdf
    • http://www.riverkennet.org/uploads/files/files/free-minecraft-mods-for-xbox-one_GM479516143.pdf
    • http://www.riverkennet.org/uploads/files/files/free-avatar-roblox_GM431946152.pdf
    • http://www.riverkennet.org/uploads/files/files/how-to-actually-get-free-robux_GM431946152.pdf
    • http://www.riverkennet.org/uploads/files/files/coin-master-hack-fast_GM406889139.pdf
    • http://www.riverkennet.org/uploads/files/files/coin-master-35-2-hack_GM406889139.pdf
    • http://www.riverkennet.org/uploads/files/files/roblox-no-download-hack_GM431946152.pdf
    • http://www.riverkennet.org/uploads/files/files/robux-generator-without-human-verification_GM431946152.pdf
    • http://www.riverkennet.org/uploads/files/files/download-hacked-games-coin-master_GM406889139.pdf
    • http://www.riverkennet.org/uploads/files/files/scary-larry-roblox_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004b24.bin
3eb8e6ca4abbf8536e97d241c675f16194e4f2c4312cc888d60a9ac9527faa7f
pdf-font-stream PDF embedded font (sfnt) at offset 0x4B24 24876 bytes
font_01_sfnt_off0000839c.bin
8d8733a7c40ec122fa0656e79a44d71687d26648648a8c1fb15c9a660e1bc95a
pdf-font-stream PDF embedded font (sfnt) at offset 0x839C 18304 bytes