PDF malware analysis — malicious · 0ec18614f0a435ef

MALICIOUS

PDF

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

MD5: 9b98621854be07c72d8f92dac887bf0d SHA-1: 8e4ea45420d28de1747b7a946a03acbf9789da52 SHA-256: 0ec18614f0a435ef328df90604523c150a9c1db37efed4c4d3fe2682f9acaed8

268 Risk Score

Malware Insights

MITRE ATT&CK

T1059.007 JavaScript T1203 Exploitation for Client Execution T1566.001 Spearphishing Attachment

This PDF file contains embedded JavaScript that is heavily obfuscated and utilizes eval() calls, indicating an attempt to exploit vulnerabilities for code execution. The ClamAV detection 'Pdf.Exploit.Agent-35587' further confirms its malicious nature. The primary function appears to be downloading and executing a secondary payload, as suggested by the exploit cluster heuristics.

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.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` `383f052030c3aa5a7581822906e3f3d2c736dff6336c7d21fb24ea6d97d02103`	pdf-javascript-stream	PDF /JS object 7 at offset 0x21C	29959 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` `5ef98cf404c652d74dc61fa5db7d355a0692a693e9345078fe5021bba2cc1944`	pdf-javascript-stream	PDF /JS object 7 at offset 0x21C	29001 bytes

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