Malware or normal state?

Hello,

Wordfence informed me about a potential malware infection on multiple Enfold Websites. Is this really a malware infection?

Filename: wp-content/themes/enfold/config-templatebuilder/avia-template-builder/php/html-helper.class.php
Bad URL: http://www.link.at/
File type: Not a core, theme or plugin file.
Issue first detected: 23 hours 3 mins ago.
Severity: Critical
Status New
This file contains a suspected malware URL listed on Google’s list of malware sites. Wordfence decodes base64 when scanning files so the URL may not be visible if you view this file. The URL is: http://www.link.at/ – More info available at Google Safe Browsing diagnostic page.