What does the long and strange entry in the log file say?

Question

Journaling

Found a strange entry in the logs:
169.229.3.91 - - [07/May/2016:03:05:34 +0300] "z\x8AfM\x85u\x99\xB2\x14\xCD\x9A\xF4\xD1zV\x07\x13 \xC7\x89\x8BY\xBC\x99\x05\xC1A\xAF\x81da\xAB\x1A\xBE[O\x8F\xCD\xF4\xE9o,&I\xA8#\xD9\x02\xA5\xC4\xAC\ x00\xCC\xB7\xF4\xD0\x06&\xCC5Ou\xA9L\x9E" 400 172 "-" "-"
I assume this is an attempt to guess passwords?

Answer 1

rather choose the encoding))