PDF malware analysis — malicious · f4d35aa51966d99f

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: 1c22e6c64dac7fb222cc5fdffbba5cd2 SHA-1: bb4d7bfe3bd925576a096254de15a0bcb8d643c9 SHA-256: f4d35aa51966d99f03884a4117644e3325e180d827a7894a986c2c5773049def

136 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The PDF file contains embedded JavaScript, indicated by the PDF_JAVASCRIPT and PDF_JS heuristics. ClamAV detections (Win.Trojan.Agent-36166) confirm the malicious nature of the file. The embedded JavaScript is likely responsible for executing the malicious payload, as suggested by the T1059.001 and T1204.002 MITRE ATT&CK techniques. The document body was unreadable, but the presence of JavaScript and the ClamAV detection strongly suggest a malicious exploit or downloader.

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` `df89f030794abce38b5ad0b91e744503efd6ed5e57444d93668a93cfbc85c5b1`	pdf-javascript-stream	PDF /JS object 7 at offset 0x1A5	74755 bytes
Detection ClamAV: Win.Trojan.Agent-36166 Obfuscation or payload: unlikely

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