Pdf.Dropper.Agent-7231207-0 — PDF malware analysis

Static analysis result for SHA-256 131cb7e511fe5c1c…

MALICIOUS

PDF

7.9 KB
MD5: dcbb9db5491ef30439aca54ec2bcf41b SHA-1: 25a6014d074ee6ca0457d7d7013cc2d34ce8a64e SHA-256: 131cb7e511fe5c1c42cf5a613c1e8f44a741177ed3722213db657e262757e99e
216 Risk Score

Malware Insights

Pdf.Dropper.Agent-7231207-0 · confidence 95%

MITRE ATT&CK
T1059.007 JavaScript T1203 Exploitation for Client Execution T1566.001 Spearphishing Attachment

The critical PDF JavaScript exploit cluster heuristics, including eval() and String.fromCharCode calls, strongly indicate malicious JavaScript execution within the PDF. ClamAV detection as Pdf.Dropper.Agent-7231207-0 further confirms its nature as a dropper. The embedded JavaScript is designed to download and execute a secondary payload, typical of a dropper's function.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9412

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-7231207-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Dropper.Agent-7231207-0
  • 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
ac51acc16cb35fc14bfddc7783931706e736f8dfb52b5889b92e7b5c1d5209e2		 pdf-objstm-decoded PDF /ObjStm 24 0 obj (inflated) 380 bytes

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