PDF malware analysis — malicious · e31d093f02c12545

MALICIOUS

PDF

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

MD5: 9b33204ddb499f61ed6bfebbc2edc45d SHA-1: 2b90ad7bdfb68d64121779fd97e85e4ecc7014e2 SHA-256: e31d093f02c125455bdc3e51ed9099d0037fec651ac34fabb580ed9bbc872c7f

136 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1566.001 Spearphishing Attachment

The PDF file was detected as malicious by ClamAV with the signature Win.Trojan.Agent-36166. Static analysis revealed embedded JavaScript, indicating a likely attack pattern involving the execution of malicious code. The JavaScript's purpose is presumed to be the download and execution of a second-stage payload, although the exact mechanism is obscured by the embedded nature of the script.

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` `2f2cddf1301eaf8a5fb6d519bd7cbebc23e24c354f32465c99e485d32014d452`	pdf-javascript-stream	PDF /JS object 7 at offset 0x1A5	84188 bytes
Detection ClamAV: Win.Trojan.Agent-36166 Obfuscation or payload: unlikely

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