Top Risks

• THREAT FEED: extension ID independently confirmed malicious by TPCI chrome-mal-ids — Chibi Yahiko Pain Live Wallpaper [adware] + malext.io malicious_extension_sentry (+2.5, capped).
• NewTab override with uninstall+install URL hijack to gameograf.com — traffic monetization pattern.
• Both install and uninstall events redirect to developer domain with UTM tracking.
• No developer name listed; 'Offered by' field empty reduces accountability.
• Two innerHTML DOM-XSS sinks without CSP (MV3 has strict default but no explicit CSP declared).

Evidence

• newtab_override manifest chrome_url_overrides.newtab set to newtab.html — replaces new-tab page.
• uninstall_url_hijack crx setUninstallURL targets 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_sink crx innerHTML assignments in popup.js and calendar.js without sanitization — DOM-XSS risk.
• no_developer_name store developer_name is empty string; reduced accountability for 'Offered by' attribution.
• verified_publisher store Extension has verified_publisher badge — partial trust credit applied.
• privacy_policy_scoped api Policy fetched; scope_extension=true, data_collection=true, retention=true, third_party_sharing=true.
• low_install_count store Only 38 installs; limited blast radius but monetization infrastructure (UTM, newtab) already in place.
• threat_feed_membership api Extension ID listed by TPCI chrome-mal-ids — Chibi Yahiko Pain Live Wallpaper [adware] + malext.io malicious_extension_sentry; score 2.63 -> 5.13 (+2.5 cap 2.5).

Permissions Breakdown

• search medium Allows querying search engine; concerning in a NewTab override context.
• host_permissions: https://api.gameograf.com/* medium Scoped to developer's own API domain; enables data exfiltration to that endpoint.
• chrome_url_overrides: newtab medium Replaces new-tab page; monetization and search-redirect vector.

Pillar Scores

Bookkeeping