icloud phishing

I just received a phishing email in icloud, an account I never use. The claim was that my account will be billed, blah blah.

here it is:

ur Order Number: Z158628671 was processed. We'll notify you if it has been sent. Payment received on May 02, 2019 (Dit ordrenummer: Z158628671 blev behandlet. Vi meddeler dig, hvis den er blevet sendt. Betaling modtaget den 2. maj 2019)

there is a PDF attachment (which I opened, of course)

any steps I should take next

what is being done to thwart these criminals?