WoSign: Free two-year multi-domain SSL certificate 11 years ago
The objective truth is that no theft has happened. Laws about theft are not applicable to copyright infringement.
But you're right, it's taken from LowEndTalk[1] and it remains unknown to us if the author asked for permission to copy the instructions to his or her blog.
[1] http://www.lowendtalk.com/discussion/41289/free-chinese-2-ye...