PDF malware analysis — malicious · 59e6d7294559b716

MALICIOUS

PDF

30.5 KB Created: 2009-05-01 21:21:45 Authoring application: ghjkSFghjkCPx (via afdsdgf)

MD5: bbf8f4019e7fb386619888b36604af35 SHA-1: e61a081f85a1602bef9b868a332dd6201f236063 SHA-256: 59e6d7294559b716de9a0f3f0141cfcaff9fb183faa07ce66b800d110588cfe0

208 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell

This PDF file was flagged as malicious by ClamAV with the signature Pdf.Exploit.Agent-35587. It contains embedded JavaScript, including calls to eval(), which is a common technique for obfuscating malicious code. The JavaScript is likely responsible for downloading and executing a second-stage payload, as indicated by the heuristic firings and the ML classifier's high confidence score. The specific exploit used is not detailed in the provided evidence.

Machine Learning

Nyx PDF Classifier malicious score 1.0000

Heuristics 6

ClamAV: Pdf.Exploit.Agent-35587 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Exploit.Agent-35587
ClamAV detection on extracted artifact critical EXTRACTED_FILE_CLAMAV

ClamAV flagged at least one file extracted from inside this sample. Even when the wrapping document carries no AV detection of its own, a hit on the carved artifact is a strong indicator the sample is a delivery vehicle.
eval() call high PDF_EVAL

eval() found — commonly used for obfuscated exploit execution
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.

Filename	Kind	Source	Size
`javascript_obj0007_000.js` `d839cfff0803a3f48d1a9213b66932906de7f3c7e8d7c7ab4773c96dc24f1414`	pdf-javascript-stream	PDF /JS object 7 at offset 0x21C	29975 bytes
Detection ClamAV: Pdf.Exploit.Agent-35587 Obfuscation or payload: likely Carved artifact contains 6 eval/decoder/string-building token(s).
`javascript_obj0007_001.js` `a0028d82c6596f25387ee3610e97b46dc36c3e1d8023703d27d805f59d0d4f4f`	pdf-javascript-stream	PDF /JS object 7 at offset 0x21C	28997 bytes

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