Malicious PDF — malware analysis report

Static analysis result for SHA-256 e69fcae5e14a6781…

MALICIOUS

PDF

15.5 KB Created: 2010-02-28 12:35:05 +03:00 Authoring application: Acrobat Editor 9.0 (via Adobe Acrobat 9.3.1) First seen: 2026-05-11
MD5: ca36dad8dbbe3682f2dd142e27afbd2f SHA-1: ef5c575832093a32e048ef9807c2b496f657c484 SHA-256: e69fcae5e14a678177b2d3cf0162833810c4986edd1e26013122b9c3ae1d90a1
150 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell T1204.002 Malicious File

The PDF file contains embedded JavaScript, indicated by the PDF_JAVASCRIPT and PDF_JS heuristics. The script utilizes an unescape() call, a common obfuscation technique, to decode a malicious payload. The script's logic suggests it is designed to construct a large string and potentially download a second-stage payload, although the exact URL is not directly extractable due to obfuscation. The benign URLs present are standard PDF metadata namespaces.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9965

Heuristics 5

  • 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
    {
return unescape(RandomVar8);
}
  • 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.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://www.w3.org/1999/02/22-rdf-syntax-ns# In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/AcrobatAdhocWorkflow/1.0/In PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
javascript_obj0046_000.js pdf-javascript-stream PDF /JS object 46 at offset 0x3AB2 40 bytes
SHA-256: 1d7517a3e105c718fa8ff8113d49fb7604787c645f286108ed26e4690d9a271c
Preview script
First 1,000 lines of the extracted script
app.alert(this.getField("Text1").value);
stream_009_off000032c6.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x32C6 2312 bytes
SHA-256: bc39f6d884bb4d10b2153c47e97bb90b9ec8d854e95c5fd083d2d390468cff34

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