Malicious PDF — malware analysis report

Static analysis result for SHA-256 d0eba6ac886552a5…

MALICIOUS

PDF

7.8 KB First seen: 2026-05-10
MD5: 8c6631a672ebf2711addf82a622ad1a8 SHA-1: 3742c78f6a2072179416778218a89d525916555e SHA-256: d0eba6ac886552a598884c9f5f3df3243c6a04cc08b10fefd8fd3663e9b2be14
150 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell

The PDF file contains embedded JavaScript, as indicated by the PDF_JAVASCRIPT and PDF_JS heuristics. The presence of a PDF_EVAL heuristic firing suggests that the JavaScript is likely obfuscated and attempts to execute arbitrary code. The extracted artifact 'stream_002_off00000328.js' is a strong indicator of malicious intent, likely to download and execute a second-stage payload. No specific malware family could be identified.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9483

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
    /*asdfhjsdfskjahfahdkjbbrfb*/ eval('/*asdfhjsdfskjahfahdkjbbrfb*/jubtbsb/*asdfhjsdfskjahfahdkjbbrfb*/=/*asdfhjsdfskjahfahdkjbbrfb*/eval;/*asdfhjsdfskjahfahdkjbbrfb*/'); /*asdfhjsdfskjahfahdkjbbrfb*/
  • 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_off00000328.js decompressed-pdf-stream PDF FlateDecoded stream at offset 0x328 2671 bytes
SHA-256: 1f82b818cb38ee1617e0aa9423719881f2d4f0c50cde7bd5afe162bdf5d021dc
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact contains 1 eval/decoder/string-building token(s).
objstm_0024_00.bin pdf-objstm-decoded PDF /ObjStm 24 0 obj (inflated) 331 bytes
SHA-256: 502f35f241a83a32e6ae9f06c3c91238ebb6bcad979929bbc442f4a16527ac65

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