This app is part of the seed and there aren't found similar apps on marketplaces

MD5	Package Name	Fingerprint	Source	Detection date
89ec9120851bfacc615c23034720d1e2	facebook.messenger.facebookmessenger.facebook.messenger.social.free.app.top.facebook.messenger.tube.facebookmessenger	C1E83A27186EE50C74B756A7B7B04BC8	virustotal	2015-04-08