PDF malware analysis — malicious · 7a09dc79ff3df47e

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: 13827a483e2b523f14db036aca77b912 SHA-1: a9d87de8a1ed4bf5520fe8b39db611443fcdcf5f SHA-256: 7a09dc79ff3df47e8b90d365debd2bca027393ee6d096ffd42a740345b70ebd2

166 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The file is a PDF document flagged by ClamAV as Pdf.Dropper.Agent-7275161-0, and an extracted artifact was also detected by ClamAV as Win.Trojan.Agent-36166. Heuristics indicate the presence of embedded JavaScript, which is often used to download and execute further malicious content. The ML classifier also strongly suggests maliciousness.

Machine Learning

Nyx PDF Classifier malicious score 0.9999

Heuristics 4

ClamAV: Pdf.Dropper.Agent-7275161-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Dropper.Agent-7275161-0
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` `75ab7d166310622bd0b5e805e8963aa1cfef777c59aaac29dc486d0c5a49aad1`	pdf-javascript-stream	PDF /JS object 7 at offset 0x1A5	74874 bytes
Detection ClamAV: Win.Trojan.Agent-36166 Obfuscation or payload: unlikely

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