That's a first for me,
After all these years, I now have to be alert for malware.

Got a bunch of emails from my contacts saying I'm infected,
Funny thing is is that it was from an old Yahoo account I don't use anymore.
Well, I logged in there and deleted all my contacts and changed the password,
Seems like someone from India has a sense of humour and likes to play around in his spare time.

Now how do I delete my Yahoo account?

It's not malware. It's either someone spoofing your account, or your account has been compromised.

Yea, I think it was compromised,
Downloaded ClamXav and found 26 other malwares on my computer,
Although, They were either zip downloads or in Apple mail, Which I don't use anyways.

But, I did delete them anyways.

Yahoo was hacked the other day and thousands of addresses were hacked..
I changed my password because I got bounce backs.. knowing I never emailed those people..
google it ..
it happened about 2 weeks ago.