Malicious PDF — malware analysis report

Static analysis result for SHA-256 b3de28e085045747…

MALICIOUS

PDF

6.9 KB First seen: 2026-05-11
MD5: 9e681e2e6e1dbdce1a34453a16a2201e SHA-1: 9de889b03ecb5b7a09be98290fe634d1322cf9cc SHA-256: b3de28e0850457472aff3735b72c4d9c4d470f5e99f6ada96400c7ff089c0161
150 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell

The PDF file exhibits suspicious characteristics, including embedded JavaScript and an unescape function call, indicating an attempt to hide malicious code. The presence of obfuscated JavaScript suggests the file's primary purpose is to download and execute a secondary payload. While specific IOCs like URLs are benign, the embedded artifacts and JavaScript actions point towards a downloader or dropper functionality.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9833

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 2058 bytes
SHA-256: 00a08e6f9a22866b369c1749b82bc7cd28eb41d2e3ca74d3ee81381d0a536d73
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact contains 2 eval/decoder/string-building token(s). Carved artifact contains 1 long base64-like blob(s).
objstm_0024_00.bin pdf-objstm-decoded PDF /ObjStm 24 0 obj (inflated) 331 bytes
SHA-256: c32ee929a5b9135fe0c934dc3a8c9f02b9f45949a8775295c7c7d70d98a8b57b

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