Remove MAL/PHISH-A from Mac

Hi, I have a Macbook Pro with High Sierra and latest software update.

Sofos detected the following -

Manual cleanup required: 'Mal/Phish-A' at '/Users/anthonycook/Library/Mail/V5/8687E922-93D1-49D0-ABB2-0ACFBA68B552/[Gmail ].mbox/Spam.mbox/8A8B8D7D-7DD4-4768-A0CD-3161B3197C54/Data/1/7/3/Attachments/371 666/2/Web site.html'

I am unable to work out how to remove it...The tips given by Sofos don't seem to apply to this scenario.