coinbasuiuextension[.]gitbook[.]io

coinbasuiuextension.gitbook.io is a subdomain of gitbook.io. PhishDestroy first observed the hostname on Apr 10, 2026. Stored content metadata identifies Coinbase as the apparent target. Stored page analysis classifies the content as brand impersonation. Current evidence score: 100/100 (critical).

Positive findings are stored from 5 sources: VirusTotal, MetaMask, SEAL, DNS security resolvers, and URLQuery. VirusTotal recorded 14 detections among 94 engines: ChainPatrol, BitDefender, CyRadar, ESET, Emsisoft, Fortinet, G-Data, Kaspersky, LevelBlue, Lionic, Netcraft, Sophos, VIPRE, Webroot on Jul 18, 2026 at 16:07 UTC. MetaMask and SEAL listed the hostname in the separate external-blocklist snapshot on Aug 8, 2026 at 10:20 UTC. DNS security checks returned 2 blocking results across 12 tested policies: Brand Sui, Quad9 Secure; no observation timestamp was retained. URLQuery recorded 3 threat-system alerts on Apr 10, 2026 at 13:54 UTC. Non-positive and contextual checks: On Apr 10, 2026 at 14:21 UTC, Google Safe Browsing returned no flag; PhishStats returned no feed match. URLScan completed without a malicious verdict on Jul 29, 2026 at 02:42 UTC.

Cloaking was recorded with HTTP 307 on Aug 8, 2026 at 11:02 UTC. The cloaking probe recorded content divergence conditional delivery at 1/100 on Aug 8, 2026 at 11:02 UTC: redirect: raw=redirect_307; http=307; via=https_proxy; location=https://coinbasuiuextension.gitbook.io/us/; server=cloudflare. Registration records for the registrable domain gitbook.io list Cloudflare, Inc as the registrar and Apr 10, 2026 as the creation date. Registration and first observation occurred on the same UTC date. At collection time, the hostname resolved to 172.64.147.209 on AS13335 (Cloudflare, Inc.). The IP and ASN identify shared Cloudflare edge infrastructure; the origin server is not established by this address. The evidence archive retains 3 visual captures from PhishDestroy, URLScan, and URLQuery; no page title was retained, so the captures preserve the landing-page appearance. TLS metadata lists Google Trust Services as the certificate issuer with validity through Jun 19, 2026; checked Apr 10, 2026 at 17:50 UTC.

The content indicators and 5 positive source findings support the current Coinbase-themed brand impersonation classification.