Funny account_info.zip attachment - Virus ?

Two questions really:

1- Is this an inoffensive prank ?
2- Where do I report such malware?

I received this am a short email portending to email me my earthlink password info. I wouldnt give it a second look EXCEPT that in some weird moment of inattention I clicked on the attachement ( !! and I really know better ).
Well, here is the content of the attachment  account_info.zip opened in a hex editor:

00000000  50 4B 05 06 00 00 00 00  00 00 00 00 00 00 00 00  PK . . . . . . . . . .
00000010  00 00 00 00 00 00                                                . . . . . .

Am I correctly inferring that this is an inoffensive prank ?

Looking at the email header it was obviously a malware type thing since it was addressed to
X-Account@attglobal.net (and not my own asdf@attglobal.net  acccount )

For completeness this is the whole email :

X-Persona: <AHT>
Received: from gntkt.net (illhyd-static-203.197.253.62.vsnl.net.in[203.197.253.62])
          by prserv.net (in4) with SMTP
          id <2005050310133810401pnitpe>; Tue, 3 May 2005 10:13:42 +0000
X-Originating-IP: [203.197.253.62]
From: hostmaster@earthlink.net
To: X-Account@attglobal.net
Date: Tue, 03 May 2005 10:10:11 GMT
Subject: FwD: Your Password
Importance: Normal
X-Priority: 3 (Normal)
Message-ID: <a4bb.baec7a24bf6339f@earthlink.net>
MIME-Version: 1.0
Content-Type: multipart/mixed; boundary="=88f2e9eae6f2f70cbfa2e0"
Content-Transfer-Encoding: 7bit
This is a multi-part message in MIME format.

Account and Password Information are attached!

Visit: http://www.earthlink.net



*** Attachment-Scanner: Status OK
*** "ATTGLOBAL" Anti-Virus
*** http://www.attglobal.net