Top Risks

• THREAT FEED: extension ID independently confirmed malicious by TPCI chrome-mal-ids — 67 Meme Cyberpunk Live Wallpaper [adware] + malext.io malicious_extension_sentry (+2.5, capped).
• Uninstall AND install URL hijack to gameograf.com — classic traffic-monetization shell pattern.
• New-tab override with 'search' permission: high-reach monetization surface replacing every new tab.
• Privacy policy is Google's generic account policy — does not scope to this extension; admits data collection and third-party sharing.
• No CSP declared (MV3 still benefits from explicit CSP); DOM-XSS sink in calendar.js with innerHTML.

Evidence

• install_url_hijack + uninstall_url_hijack manifest Both onInstalled and uninstall open gameograf.com UTM-tagged URLs — textbook monetization shell (+2+3 Webstore).
• newtab_override manifest chrome_url_overrides.newtab = newtab.html; combined with search permission signals search-monetization pattern.
• privacy_policy_generic_google store Policy URL is myaccount.google.com/privacypolicy — scope_extension=false, data_collection=true, third_party_sharing=true → +10 Privacy.
• dom_sink_innerhtml crx calendar.js assigns user-controlled variable to innerHTML; no CSP to mitigate DOM-XSS.
• no_csp manifest content_security_policy is null; csp_present=false on MV3 extension with DOM sink.
• developer_name_blank store developer_name is empty string; reduces accountability despite verified_publisher=true.
• verified_publisher store verified_publisher=true; partial reputation credit applied but not enough to offset policy and pattern signals.
• search_engine_count_1_newtab api Only 1 search engine (google.com) seen; single-engine NewTab — no multi-engine aggregator penalty.
• threat_feed_membership api Extension ID listed by TPCI chrome-mal-ids — 67 Meme Cyberpunk Live Wallpaper [adware] + malext.io malicious_extension_sentry; score 5.44 -> 7.94 (+2.5 cap 2.5).

Permissions Breakdown

• search medium Can intercept/influence search queries; combined with newtab override raises monetization concern.
• alarms low Schedules background tasks; low standalone risk.
• storage low Local data persistence; low standalone risk.
• newtab (chrome_url_overrides) high Replaces every new tab — high-reach surface for monetization or search hijack.
• host: https://api.gameograf.com/* medium Outbound API calls to developer-controlled backend; exfil surface.

Pillar Scores

Bookkeeping