¿Se puede saber si un adjunto es maligno o no?

Hola a todos:
Acabo de recibir un email con un archivo adjuntom de MS Microsoft -ya sé que
Microsoft no envía email- pero he ido a propiedades y he leído el texto y os
lo copio porque a simple vista parece como... bastante legal.
Me podeis decir cómo puedo identificar si el adjunto es nocivo o no,
ejemplo, yo hasta ahora recibo muchos con adjuntos .pif pero este son sé
distinguirlo.
Gracias por la información que me faciliteis.
Un saludo
Howard




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FROM: "MS Corporation Security Assistance"
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SUBJECT: Internet Patch
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MS User

this is the latest version of security update, the
"April 2004, Cumulative Patch" update which resolves
all known security vulnerabilities affecting
MS Internet Explorer, MS Outlook and MS Outlook Express
as well as three newly discovered vulnerabilities.
Install now to help maintain the security of your computer.
This update includes the functionality of all previously released patches.

System requirements: Windows 95/98/Me/2000/NT/XP
This update applies to:
- MS Internet Explorer, version 4.01 and later
- MS Outlook, version 8.00 and later
- MS Outlook Express, version 4.01 and later

Recommendation: Customers should install the patch at the earliest opportunity.
How to install: Run attached file. Choose Yes on displayed dialog box.
How to use: You don't need to do anything after installing this item.


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