PDF malware analysis — malicious · 1b0c5e770a775c53

MALICIOUS

PDF

35.5 KB Created: 2009-05-01 21:21:45 Authoring application: tvEeSFCPx (via NeTSnrx)

MD5: e874840c4319331329bde7cad1be271d SHA-1: 16972a1ebe0a435ed9956bf69c135aac055cfb0a SHA-256: 1b0c5e770a775c53d866861a3aed7c31702d13e701f03b4570f81815e3eaa3cb

248 Risk Score

Malware Insights

MITRE ATT&CK

T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains heavily obfuscated JavaScript, including calls to eval() and unescape(), which is a strong indicator of exploit code. The ClamAV detection name 'Pdf.Dropper.Agent-5343308-0' suggests its function as a dropper. The presence of multiple embedded JavaScript streams and exploit-related heuristics further supports the conclusion that this PDF is designed to exploit vulnerabilities and deliver a secondary payload.

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-5343308-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Dropper.Agent-5343308-0
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.

Filename	Kind	Source	Size
`javascript_obj0007_000.js` `6faa0ecc86e3ac801b72634d55dffa46c3498c0fea4f0efeaed3c83d1738b410`	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` `6415b677a70de21a77bc98ae7d2018950517e176af647df6ee551f373f726459`	pdf-javascript-stream	PDF /JS object 7 at offset 0x215	35039 bytes

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