PDF malware analysis — malicious · 2da31638d22bcb42

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: 8f42145a07e2cd990b683565045517bc SHA-1: a1cdaedd07cf50f328a3ff8fe11c3011cd515044 SHA-256: 2da31638d22bcb422dbb304af57132e140124446e24e446686db3bf9ca5502cc

136 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious Link

The critical ClamAV heuristic firings indicate the file is recognized as 'Win.Trojan.Agent-36166'. The presence of PDF JavaScript actions and embedded JS streams strongly suggests that the PDF is designed to exploit vulnerabilities or trick the user into executing malicious code. The embedded JavaScript is likely responsible for downloading and executing a second-stage payload, which is a common technique for malware delivery.

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` `ba999bf0ed7232d83ee63c64547cfffe3213ca0e8c78050f8080a60dd854dd29`	pdf-javascript-stream	PDF /JS object 7 at offset 0x1A5	74442 bytes
Detection ClamAV: Win.Trojan.Agent-36166 Obfuscation or payload: unlikely

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