No one will be able to confirm it if you don't post the URL and if you delete it you remove the evidence.
Your earlier posts suggest you had little security on your forum, so it may not have been "hacked" so much as an unexpected user posting to it. Unfortunately photographs will tell nothing about the security settings at the time of the "hack".
Volunteer Helper - but recommending that users move off the platform!
Once the admin for GregHelp now deleted.