polkadotjs-book[.]gitbook[.]io

The domain polkadotjs-book.gitbook.io is currently flagged as a phishing infrastructure targeting users of the Polkadot ecosystem. The site’s page title, “Why Polkadot? | polkadot(js) book”, indicates an attempt to appear as an official Polkadot resource. Passive DNS shows the domain resolving to IP address 104.18.40.47, which belongs to Cloudflare’s network (AS13335, United States). The domain was registered on 30 March 2014 through Cloudflare, Inc. and continues to use Cloudflare‑provided nameservers dahlia.ns.cloudflare.com and hugh.ns.cloudflare.com.

SSL termination is performed by Google Trust Services under the “WE1” certificate, suggesting a standard Cloudflare‑provided TLS configuration. Threat‑intel sources have placed the domain on one security blocklist, and PhishDestroy actively blocks it. VirusTotal scans report that 15 of 95 security vendors classify the domain as malicious, reinforcing the suspicion of phishing activity. An HTTP request to the site returns a 403 status code, and the domain has been taken offline as of the report date, July 25 2026. The combination of a Polkadot‑related page title, cloud‑based hosting, and multiple vendor detections aligns with known patterns of credential‑harvesting campaigns that impersonate blockchain projects.

Uncertainty remains regarding the exact payload or credential collection mechanism, as no additional content analysis is available. Defenders should add the domain to blocklists, enforce DNS filtering, and monitor for any resurgence of the hostname. Given the Cloudflare hosting, any future re‑use of the same IP address could be leveraged by other malicious actors, so network‑level controls that inspect traffic to 104.18.40.47 are recommended. Continuous re‑evaluation of VirusTotal and blocklist status is advised to capture changes in the threat landscape.