Malicious PDF — malware analysis report

Static analysis result for SHA-256 c3fb95dc1f48906b…

MALICIOUS

PDF

9.0 KB First seen: 2026-05-11
MD5: b831cde896962245954bfaba3fb387bf SHA-1: 54c31e892599707680a7e3e7475f2c52628c4a7d SHA-256: c3fb95dc1f48906b901ad8f54884861e002c9894ff2cca913db4767446c54e2e
148 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell

The PDF file contains embedded JavaScript with a high-severity 'eval()' call, indicating an attempt to execute obfuscated code. This JavaScript is likely designed to download and execute a secondary payload, a common technique for initial access. No specific family could be identified due to the obfuscation and lack of further indicators.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7008

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. (matched inside decoded stream)
  • 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
    eval(itkuy8);
  • 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. (matched inside decoded stream)
  • 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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off00000329.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x329 4694 bytes
SHA-256: 2a3caa903346c0a83ca059029e0218194f648b259023fa4b112fd5cbea80e879
objstm_0024_00.bin pdf-objstm-decoded PDF /ObjStm 24 0 obj (inflated) 385 bytes
SHA-256: 090b7c530bb3f1176ac8d726db94e955f501663f636a0f6a1f9e7425bcd443a2

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