Top Risks

• THREAT FEED: extension ID independently confirmed malicious by TPCI chrome-mal-ids — Black Butler Live Wallpaper [adware] + malext.io malicious_extension_sentry (+2.5, capped).
• NewTab override gives permanent high-reach presence on every new tab opened by the user.
• Uninstall and install URL hijacks redirect to gameograf.com with tracking parameters — monetization shape.
• No content_security_policy (MV3 default applies but csp_present==false); innerHTML sinks without CSP amplify XSS risk.
• Developer name is empty despite verified publisher status — reduced accountability signal.

Evidence

• newtab_override manifest chrome_url_overrides.newtab replaces every new tab; broad user-session reach.
• uninstall_url_hijack crx setUninstallURL to https://gameograf.com/?utm_source=gameograf&utm_medium=link&utm_campaign=bg&utm_content=uninstall
• install_url_hijack crx onInstalled opens https://gameograf.com/?utm_source=install&utm_medium=link&utm_campaign=bg&utm_content=install
• no_csp manifest content_security_policy is null; csp_present false. DOM-XSS sinks present in two JS files.
• dom_xss_sink crx innerHTML written from variable in popup.js and calendar.js; no CSP to mitigate.
• developer_name_missing store developer_name is empty string; verified_publisher true but no display name reduces accountability.
• newtab_monetization_shape store NewTab + search permission + install/uninstall tracking URLs = monetization shell pattern.
• maintenance_6_12mo store months_since_update=12; borderline stale for a NewTab extension serving live wallpapers.
• threat_feed_membership api Extension ID listed by TPCI chrome-mal-ids — Black Butler Live Wallpaper [adware] + malext.io malicious_extension_sentry; score 3.08 -> 5.58 (+2.5 cap 2.5).

Permissions Breakdown

• search medium Allows reading and potentially influencing search queries.
• host_permissions: https://api.gameograf.com/* low Scoped to own API domain only; no broad host access.
• chrome_url_overrides.newtab medium Replaces new-tab page; high-reach surface for monetization or redirect.

Pillar Scores

Bookkeeping