1. 搜索关键字：“onerror”
然后找到如下所示代码：
<div style="display:none;">
<img src="https://blog.csdn.net/u012503786/article/details/78647661" οnerrοr="setTimeout(function(){if(!/(csdn.net|iteye.com|baiducontent.com|googleusercontent.com|360webcache.com|sogoucdn.com|bingj.com|baidu.com)$/.test(window.location.hostname)){window.location.href="\x68\x74\x74\x70\x73\x3a\x2f\x2f\x77\x77\x77\x2e\x63\x73\x64\x6e\x2e\x6e\x65\x74"}},3000);">
</div>
2. 直接删除