Pdf.Dropper.Agent-7266160-0 — PDF malware analysis

Static analysis result for SHA-256 623520ab6af0b701…

MALICIOUS

PDF

35.5 KB Created: 2009-05-01 21:21:45 Authoring application: tvEeSFCPx (via NeTSnrx)
MD5: a34b90d625d4fc4ca86d5631613a3a3e SHA-1: 5745f22790443587f91d4e50becd949b9324872e SHA-256: 623520ab6af0b701238e37ea7775b9e59cd1b2320b580cb15b1e36ca2e45b18c
248 Risk Score

Malware Insights

Pdf.Dropper.Agent-7266160-0 · confidence 95%

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

This PDF file contains embedded JavaScript that utilizes `eval()` and `unescape()` functions, indicating an attempt to obfuscate malicious code. The JavaScript is likely designed to exploit a vulnerability within the PDF reader to execute arbitrary code, consistent with a dropper functionality. The ClamAV detection name 'Pdf.Dropper.Agent-7266160-0' further supports this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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-7266160-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Dropper.Agent-7266160-0
  • eval() call high PDF_EVAL
    eval() found — commonly used for obfuscated exploit execution
  • unescape() call high PDF_UNESCAPE
    unescape() found — often used to decode shellcode in PDF JS exploits
  • 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.
  • 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.
  • 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.

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
javascript_obj0007_000.js
49d68f66a2a094ea937b0adace370e118a2092d0f1b70083d22a27af8cac517d		 pdf-javascript-stream PDF /JS object 7 at offset 0x215 35126 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact contains 2 eval/decoder/string-building token(s).
javascript_obj0007_001.js
9fc9ebd86f5a028cdcaa785d2bec09417a796db2dadb484b74b52dc695effc81		 pdf-javascript-stream PDF /JS object 7 at offset 0x215 35039 bytes

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