Malicious PDF — malware analysis report

Static analysis result for SHA-256 c4e9618c3278652b…

MALICIOUS

PDF

33.5 KB Created: 2021-06-21 13:17:36 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 190a509eee32df122eb8fa9c19040a9c SHA-1: a5d617d0d795ebfe3771a6a15e9ed36452e2f78a SHA-256: c4e9618c3278652bfc17505cfe3831819467a3c86c8c512948bfbb787dc053e6
102 Risk Score

Malware Insights

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

The PDF document contains numerous links, presented as a "link farm", that direct users to websites offering game hacks and cheats. The primary URL, http://netcdn.co/app/431946152/codes-that-are-get-free-roblox-game-hack, is likely intended to host a malicious payload. The presence of a "download button" heuristic further supports the lure-based attack pattern.

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/codes-that-are-get-free-roblox-game-hack
    • https://kupinapopust.mk/pub/img/userfiles/files/coin-master-free-coins-and-spins-app_GM406889139.pdf
    • https://kupinapopust.mk/pub/img/userfiles/files/hack-the-coin-master-game_GM406889139.pdf
    • https://kupinapopust.mk/pub/img/userfiles/files/roblox-hack-online-no-download-no-survey_GM431946152.pdf
    • https://kupinapopust.mk/pub/img/userfiles/files/how-to-get-free-robux-otis_GM431946152.pdf
    • https://kupinapopust.mk/pub/img/userfiles/files/hack-crack-for-coin-master-currency_GM406889139.pdf
    • https://kupinapopust.mk/pub/img/userfiles/files/coin-master-free-spins-and-coins-link-blogspot_GM406889139.pdf
    • https://kupinapopust.mk/pub/img/userfiles/files/roblox-robux-hack-generator_GM431946152.pdf
    • https://kupinapopust.mk/pub/img/userfiles/files/blox-fish-free-robux_GM431946152.pdf
    • https://kupinapopust.mk/pub/img/userfiles/files/free-card-collection-in-coin-master_GM406889139.pdf
    • https://kupinapopust.mk/pub/img/userfiles/files/no-human-verification-free-tiktok-fans_GM835599320.pdf
    • https://kupinapopust.mk/pub/img/userfiles/files/coin-master-hack-tool_GM406889139.pdf
    • https://kupinapopust.mk/pub/img/userfiles/files/free-executors-for-roblox_GM431946152.pdf
    • https://kupinapopust.mk/pub/img/userfiles/files/hex-number-gives-free-robux-no-verification-2021_GM431946152.pdf
    • https://kupinapopust.mk/pub/img/userfiles/files/coin-master-free_GM406889139.pdf
    • https://kupinapopust.mk/pub/img/userfiles/files/royale-high-roblox-outfit-hacks_GM431946152.pdf
    • https://kupinapopust.mk/pub/img/userfiles/files/como-hackear-coin-master-ios_GM406889139.pdf
    • https://kupinapopust.mk/pub/img/userfiles/files/windows-10-minecraft-free-with-java_GM479516143.pdf
    • https://kupinapopust.mk/pub/img/userfiles/files/is-free-robux-real_GM431946152.pdf
    • https://kupinapopust.mk/pub/img/userfiles/files/free-coins-on-coin-master_GM406889139.pdf
    • https://kupinapopust.mk/pub/img/userfiles/files/free-coins-and-spins-coin-master-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_off00002f68.bin
c2604c2c5377ddc7b8a50d54086d533b140e98a7783cf31bb90c68f0c6da2659
pdf-font-stream PDF embedded font (sfnt) at offset 0x2F68 21164 bytes
font_01_sfnt_off00005d89.bin
953a8a409d264a887514e8a06e8bc3484f164d144075db73be50ff4e04d38fc7
pdf-font-stream PDF embedded font (sfnt) at offset 0x5D89 19092 bytes