I have found older version of Facebook For Android app here which was hosted on geekfiles.in
When i wanted to install 1.8.1 and checked permissions, the following arose my suspicions:
Services that cost you money:
Send SMS messages
edit SMS or MMS, read SMS or MMS, receive SMS
act as an account authenticator, manage the accounts list
read phone state and identity
discover known accounts
modify/delete SD card contents
Can unscrupulous people inject malware into APKs? If yes, what are trusted repositories for downgrading apps to older versions?
Is this repository trusted source?