That’s not related to anything in particular with 1.31.5, it’s not a new result (I have seen it before).
The only occurange of www.example.com would exist in:
/etc/httpd/conf/extra/httpd-ssl.conf
which is just the default name of the default 443 virtualhost.
As for what it is, I’m not exactly positive, but it may be part of the internal monitoring.
You could try checking through your apache logs for anything related to example.com, but I’m guessing you may not find anything.