Pdf.Dropper.Agent-6290638-0 — PDF malware analysis

Static analysis result for SHA-256 5eb5b0ae40e4952e…

MALICIOUS

PDF

8.0 KB
MD5: 7f4b363eae9c616c890d069430eeb2a9 SHA-1: 7e6437d3ddedf00a5acd30e7b12956c7149946b5 SHA-256: 5eb5b0ae40e4952ee4f589f35114f29bcfe1ae52a0cb0e0e0c03eb3f4c813026
216 Risk Score

Malware Insights

Pdf.Dropper.Agent-6290638-0 · confidence 95%

MITRE ATT&CK
T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF file contains embedded JavaScript that utilizes eval() and String.fromCharCode(), indicating an attempt to execute arbitrary code. This is further supported by critical heuristic firings related to PDF JavaScript exploits and a ClamAV detection for Pdf.Dropper.Agent-6290638-0. The primary function appears to be the execution of a malicious script, likely to download and run a secondary payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8822

Heuristics 7

  • 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.
  • ClamAV: Pdf.Dropper.Agent-6290638-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Dropper.Agent-6290638-0
  • eval() call high PDF_EVAL
    eval() found — commonly used for obfuscated exploit execution (matched inside decoded stream)
  • JavaScript action low 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)
  • 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)
  • String.fromCharCode low PDF_FROMCHARCODE
    String.fromCharCode found — used to construct payload strings dynamically. Common in benign JavaScript libraries for codepoint manipulation, so this alone is informational; weaponised use is also caught by the dedicated fromCharCode-stage and exploit-shape 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#
    • http://ns.adobe.com/xap/1.0/
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/pdf/1.3/

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
objstm_0024_00.bin
1070d2352b37dccea7759ddd979545329c9432d3abc1ae0e52d6bcad4c0f40aa		 pdf-objstm-decoded PDF /ObjStm 24 0 obj (inflated) 380 bytes

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