Top Risks

• THREAT FEED: extension ID independently confirmed malicious by TPCI chrome-mal-ids — Muscle Car Inferno Live Wallpaper [adware] + malext.io malicious_extension_sentry (+2.5, capped).
• NewTab override with uninstall/install URL hijack — classic monetization shell pattern.
• No CSP declared (MV3 default applies but no explicit policy); innerHTML sinks present in popup.js and calendar.js.
• Developer name field empty; verified publisher but no displayed identity.
• Uninstall and install URL hijack both pointing to gameograf.com UTM-tracked landing page.

Evidence

• newtab_override manifest chrome_url_overrides.newtab set to newtab.html; primary function is wallpaper NewTab replacement.
• uninstall_url_hijack crx setUninstallURL points to https://gameograf.com/?utm_source=extension&utm_medium=install
• install_url_hijack crx onInstalled opens https://gameograf.com/?utm_source=extension&utm_medium=install
• dom_xss_sinks crx Two innerHTML-from-variable sinks in popup.js and calendar.js with no CSP to mitigate.
• no_csp manifest content_security_policy is null; csp_present=false. MV3 default applies but no explicit hardening.
• verified_publisher store verified_publisher=true, developer email support@gameograf.com matches policy domain.
• privacy_policy api Policy fetched, scoped, data_collection+retention+third_party_sharing all true; adequate.
• low_installs store Only 54 installs, 0 ratings; very limited blast radius currently.
• threat_feed_membership api Extension ID listed by TPCI chrome-mal-ids — Muscle Car Inferno Live Wallpaper [adware] + malext.io malicious_extension_sentry; score 2.93 -> 5.43 (+2.5 cap 2.5).

Permissions Breakdown

• search medium Allows overriding search suggestions; combined with newtab override elevates risk.
• chrome_url_overrides.newtab medium Replaces new-tab page; primary monetization surface for this category.
• host_permissions: https://api.gameograf.com/* low Scoped to developer's own API domain; limited blast radius.

Pillar Scores

Bookkeeping