A feature of Apples new operating system for the iPhone tracks what users copy and paste.
Facebook Messenger for iOS takes advantage of that feature, suggesting that users share a URL they copy.
She says that she had copied the link onto the clipboard for sharing it with her friends and relatives.
Many iOS apps can get into the clipboard and do something similar to what youre describing.
For instance, Flipboard, Doesnt sound untoward to me.
To assume that the Facebook app would do something malicious with this content is silly.
source: www.techworm.net