There are several techniques to check whether the domain
fbsbx.com is owned by Facebook.
Let's check the WHOIS record for
Registry Registrant ID:
Registrant Name Domain Administrator
Registrant Organization Facebook, Inc.
Registrant Street 1601 Willow Road,
Registrant City Menlo Park
Registrant State/Province CA
Registrant Postal Code 94025
Registrant Country US
Registrant Phone +1.6505434800
Registrant Phone Ext:
Registrant Fax +1.6505434800
Registrant Fax Ext:
Registrant Email firstname.lastname@example.org
fb.com is one of Facebook's domains, and the registrant organization is Facebook, so that looks legit.
dig NS fbsbx.com
fbsbx.com. 52794 IN NS a.ns.facebook.com.
fbsbx.com. 52794 IN NS b.ns.facebook.com.
The nameservers are on the
facebook.com domain, which also looks legit.
https://lookaside.fbsbx.com/ delivers a certificate issued for the following domains:
So whoever owns
fbsbx.com also has access to a valid
The domain is legit.
Be warned that the PDF linked in the post may still link to phishing sites.