Which hack is this?

[Hanasaki JiJi]

Any thoughts on how to decode the below and determine what it was trying 
to send out?

squid[5383]: urlParse: Illegal character in hostname 
'%77ww.o%6e%6cine%2du%70d%61%74e-c%65%6e%74%65%72%2ec%6fm'
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