PDF malware analysis — malicious · 4ac18fa0094bf76d

MALICIOUS

PDF

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

MD5: 28dbae98e0632c1928857fb040da132d SHA-1: 501182c86f2144db46066a665b562645e510713b SHA-256: 4ac18fa0094bf76d4fdf0aae9270f00b13532d14e684fb984da6d9a5ac6d6a6a

136 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1566.001 Spearphishing Attachment

The file is a PDF containing embedded JavaScript, as indicated by multiple heuristic firings. ClamAV detection confirms this is a malicious sample, specifically identified as Win.Trojan.Agent-36166. The JavaScript's presence strongly suggests it's used to download and execute a secondary payload, a common technique for malware delivery. The document body was unreadable, but the presence of JavaScript and the ClamAV signature are sufficient indicators of malicious intent.

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` `80db755229b9703d5a3bc5c9f38ec090f36fca091b21fc679d8f60c1611a47b0`	pdf-javascript-stream	PDF /JS object 7 at offset 0x1A5	74378 bytes
Detection ClamAV: Win.Trojan.Agent-36166 Obfuscation or payload: unlikely

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