Malicious PDF — malware analysis report

Static analysis result for SHA-256 411850375f2c1cd6…

MALICIOUS

PDF

7.1 KB First seen: 2026-05-10
MD5: 493f1f3c90975717b02251d5e43bfc3f SHA-1: f42f0d42dba8f1175c1923bbe5b612ab5cd8c311 SHA-256: 411850375f2c1cd603c7b488b0726eaf9f5eaba0df1dab20220d672ebd8d2daa
150 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell

The PDF file contains embedded JavaScript, indicated by the PDF_JAVASCRIPT and PDF_JS heuristics. The unescape() function call within the script suggests an attempt to decode and execute malicious code. While no specific URLs or further script content were extracted, the presence of obfuscated JavaScript points to an attempt to download and execute a second-stage payload. The benign URLs extracted are not indicative of malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9825

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. (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
    RandomVar1=unescape(RandomVar1);
  • 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)
  • 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.
  • 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_off00000327.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x327 2331 bytes
SHA-256: 7bd112e6934133f1d28154c101f853dadbf947cbbce7e7348dd66d7a80357137
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact contains 3 eval/decoder/string-building token(s). Carved artifact contains 1 long base64-like blob(s).
stream_003_off0000082d.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x82D 442 bytes
SHA-256: 140e22140c28997ed8ca134f16ff2babfe57abb6216677cd1592e6c2b0c50c12

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