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

MD5	Package Name	Fingerprint	Source	Detection date
b681caf8c8602532def0d9f1a41fa509	facebook.messenger.facebookmessenger.facebook.messenger.social.free.app.top.facebook.messenger.facebookmessenger	1492BD38D07F962195401873AC4553AB	virustotal	2015-04-08