Bitdefender and WOT flag as malicious.
See: http://linkeddata.informatik.hu-berlin.de/uridbg/index.php?url=http%3A%2F%2Fy1lux.4gwpa43.com%2F&useragentheader=&acceptheader=
Re: Up(nil): unknown_html ARIN US abuse at nobistech dot net 23.105.87.7 to 23.105.87.7 4gwpa43dot com http://y1lux.4gwpa43.com/
Found in there:
Bitdefender FP?
polonus