This paper deals with a new challenge for digital forensic experts - the forensic analysis of social networks. There is a lot of identity theft, theft of personal data, public defamation, cyber stalking and other criminal activities on social network sites. This paper will present a forensic analysis of social networks and cloud forensics in the internet environment. For the purpose of this research one case study is created like - a common practical scenario where the combination of identity theft and public defamation through Facebook activity is explored. Investigators must find the person who stole some others profile, who publish inappropriate and prohibited contents performing act of public defamation and humiliation of profile owner.