Large amount of blacklistings on that IP :
https://www.virustotal.com/en/ip-address/5.101.152.55/information/

Blacklisted :
http://www.urlvoid.com/scan/filigrana-spb.ru/
https://sitecheck.sucuri.net/results/filigrana-spb.ru

Blacklistings on the IP and AS :
http://urlquery.net/report.php?id=1484475556059

Vulnerable libraries used :
http://retire.insecurity.today/#!/scan/51e4dc515b7c3e21ccad34a308a6e50c41e5223c3a56939fb2c037b2f86123a1