PDF malware analysis — malicious · 62485607a3430207

MALICIOUS

PDF

14.5 KB Created: 2009-11-15 19:41:70 Authoring application: PDF Library 4.3.9 (via PDF Library 3.9.7)

MD5: 466c5810585c6935e191107b359096e9 SHA-1: f78759265605740f2486d8ce444e7f1fde75a484 SHA-256: 62485607a3430207d5c1ca853379c2d800c176ab5a38a46cd8e8568574ddcd82

166 Risk Score

Malware Insights

MITRE ATT&CK

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

The file is a PDF containing embedded JavaScript, flagged by multiple heuristics and a machine learning classifier as malicious. ClamAV detections indicate it's an exploit targeting PDF readers, likely to download and execute a secondary payload. The JavaScript is heavily obfuscated, but its presence and the exploit indicators strongly suggest a downloader or dropper functionality.

Machine Learning

Nyx PDF Classifier malicious score 0.9999

Heuristics 4

ClamAV: Pdf.Exploit.Agent-12318 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Exploit.Agent-12318
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.
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.

Extracted artifacts 1

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0007_000.js` `5ffd2dc0ebf3d97c467545c29c6a23705342232d1c3978df19cc55602f1d5112`	pdf-javascript-stream	PDF /JS object 7 at offset 0x1A5	74448 bytes
Detection ClamAV: Win.Trojan.Agent-36166 Obfuscation or payload: unlikely

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