PDF malware analysis — malicious · ad822a960d1b670b

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: cfec5d75103c815bccc94bfd37195fc1 SHA-1: 61b9947c1b7b6d0e9963da9438649f2caf16cb61 SHA-256: ad822a960d1b670bc807efde4f02fbac6dff62fa5bb45ac7e883dc032ce69d5a

136 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The PDF file was detected as malicious by ClamAV with the signature Win.Trojan.Agent-36166. Static analysis revealed embedded JavaScript, which is a common technique for delivering second-stage malware. The JavaScript action and embedded JS stream heuristics indicate the script is likely responsible for downloading and executing a payload.

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` `840e6ec49b57ee3db747070d3c5c1750974b275472c2dfbe1b561662d362fd0d`	pdf-javascript-stream	PDF /JS object 7 at offset 0x1A5	74952 bytes
Detection ClamAV: Win.Trojan.Agent-36166 Obfuscation or payload: unlikely

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