PDF malware analysis — malicious · 240b11cfc3b0248b

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: c5d48ebafc59789bf02eeb81edcce663 SHA-1: edf04c4b8744976b694a07a3fab68049c5a18c0f SHA-256: 240b11cfc3b0248bf95adaf5725c1d463aae12c6bd100fa356ef348c5a8e7bc1

136 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell

The PDF file contains embedded JavaScript, indicated by the PDF_JAVASCRIPT and PDF_JS heuristics. ClamAV detections (Win.Trojan.Agent-36166) confirm its malicious nature. The embedded JavaScript is likely responsible for downloading and executing a second-stage payload, as suggested by the ClamAV detection name which often implies a trojan agent. The specific JavaScript content was too large to analyze in detail, but its presence and the ClamAV detection strongly suggest a malicious execution flow.

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` `afa6b16a8921835ad5275d98acca69f6e350aedd9cf180624b0db082be052b7b`	pdf-javascript-stream	PDF /JS object 7 at offset 0x1A5	74767 bytes
Detection ClamAV: Win.Trojan.Agent-36166 Obfuscation or payload: unlikely

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