PDF / .PHP malware analysis — malicious · 10a102f9effa1416

MALICIOUS

PDF / .PHP

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

MD5: 7b533156d26f069daf43b88081f25aa4 SHA-1: bca9baa1d799f7db0921b1e6a94493482a18043e SHA-256: 10a102f9effa1416c4299ca329da2f7af73715d6470fcbe95c986b7bd31d755e

166 Risk Score

Malware Insights

MITRE ATT&CK

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

This PDF file was flagged as malicious by multiple heuristics and a machine learning classifier. It contains embedded JavaScript which is heavily obfuscated but appears to be designed to download and execute a second-stage payload, as indicated by the ClamAV detection of 'Win.Trojan.Agent-36166'. The obfuscated JavaScript and the PDF format suggest it was likely delivered as a spearphishing attachment.

Machine Learning

Nyx PDF Classifier malicious score 0.9999

Heuristics 4

ClamAV: Win.Trojan.Agent-36166 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Win.Trojan.Agent-36166
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` `76bde9bea47a55e9ab1c34271eac0414ab3cf2a809d00fae1f0a78b9e6322d0d`	pdf-javascript-stream	PDF /JS object 7 at offset 0x1A5	74356 bytes
Detection ClamAV: Win.Trojan.Agent-36166 Obfuscation or payload: unlikely

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