An unknown attacker has compromised download links for the phpBB forum software. Less than 500 users downloaded the malicious PHP-based forums software. The attack was carried out by a third-party source, but the site was not exploited. The official website of a popular software is hacked to distribute malware. PHPBB is currently in use on 0.2% of all sites on the Internet, according to W3Techs. The site is currently safe and users should verify the SHA256 file hash of the file they downloaded against the one listed on the official downloads page.
Source: https://www.bleepingcomputer.com/news/security/hacker-compromised-official-phpbb-download-links/