1. Trigger 'When a new email arrives (V3)': Include Attachments = Yes, Only with Attachments = Yes, Subject Filter = Invoice.
2. Add 'Apply to each' over Attachments.
3. Inside: Condition: Attachments Name ends with '.pdf'.
4. If yes: OneDrive 'Create file': Folder /Invoices, File name = formatDateTime(utcNow(),'yyyy-MM-dd') + '_' + Attachments Name, Content = Attachments Content.
5. Test with an email carrying a PDF and a logo image.