Malware email

It's a scam and a poorly crafted one. There are no viruses that affect iPhone.

In a message Apple will always address you by your real name, never by your email address or Dear Customer. Also the sent-from address should be @apple.com or @itunes.com Additionally Apple does not send attachments.

Avoid phishing emails, fake 'virus' alerts, phony support calls, and other scams - Apple Support

Forward it as an attachment to reportphishing@apple.com

Beware of --> Phishing & Other Suspicious Emails 

Know how to --> Identify legitimate emails from the App Store or iTunes Store 

If you received an email about a subscription or Apple Music charge and you're not sure if it's real, check to make sure that it's a legitimate email from Apple.