access_log 日志中出现 CONNECT www.baidu.com:443 等类似的访问请求，是想干什么？

Question

45.137.20.150 - - [15/Jul/2021:09:59:29 +0800] "CONNECT icanhazip.com:443 HTTP/1.1" 405 288
175.184.166.193 - - [15/Jul/2021:10:07:58 +0800] "HEAD http://110.242.68.4/ HTTP/1.1" 200 -
220.200.171.91 - - [15/Jul/2021:10:07:59 +0800] "GET http://www.soso.com/ HTTP/1.1" 200 766
123.245.24.124 - - [15/Jul/2021:10:08:01 +0800] "CONNECT cn.bing.com:443 HTTP/1.1" 405 286
118.81.237.204 - - [15/Jul/2021:10:08:01 +0800] "GET http://www.rfa.org/english/ HTTP/1.1" 404 257
171.36.245.195 - - [15/Jul/2021:10:08:02 +0800] "GET http://www.wujieliulan.com/ HTTP/1.1" 200 766
219.143.174.183 - - [15/Jul/2021:10:08:02 +0800] "GET http://dongtaiwang.com/ HTTP/1.1" 200 766
49.113.97.236 - - [15/Jul/2021:10:08:03 +0800] "CONNECT www.baidu.com:443 HTTP/1.1" 405 288
125.72.95.254 - - [15/Jul/2021:10:08:03 +0800] "CONNECT dnspod.qcloud.com:443 HTTP/1.1" 405 292
124.227.31.167 - - [15/Jul/2021:10:08:04 +0800] "GET http://www.minghui.org/ HTTP/1.1" 200 766
221.205.139.8 - - [15/Jul/2021:10:08:05 +0800] "CONNECT dnspod.qcloud.com:443 HTTP/1.1" 405 292
124.227.31.145 - - [15/Jul/2021:10:08:05 +0800] "CONNECT www.voanews.com:443 HTTP/1.1" 405 290
117.14.114.3 - - [15/Jul/2021:10:08:05 +0800] "CONNECT dnspod.qcloud.com:443 HTTP/1.1" 405 292
113.120.15.214 - - [15/Jul/2021:10:08:05 +0800] "CONNECT www.so.com:443 HTTP/1.1" 405 285
113.128.105.60 - - [15/Jul/2021:10:08:06 +0800] "GET http://www.epochtimes.com/ HTTP/1.1" 200 766
123.160.235.32 - - [15/Jul/2021:10:08:07 +0800] "CONNECT dnspod.qcloud.com:443 HTTP/1.1" 405 292
36.5.158.228 - - [15/Jul/2021:10:08:08 +0800] "CONNECT dnspod.qcloud.com:443 HTTP/1.1" 405 292

access_log 日志中出现 www.baidu.com:443 等类似的访问请求，这些访客是想干什么？这是要攻击我吗？