PDF malware analysis — malicious · b90b1f5d0316acbb

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: 23c70b455defdd08e4e35334788fe60c SHA-1: 15c760451002d1e52ae2d21e194cc6188364193c SHA-256: b90b1f5d0316acbb7cb84039a628964d3ab980b03c7d8cc1d4cbde340fd8fb5b

168 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The PDF file was flagged as malicious by multiple engines, including a critical ClamAV detection identifying it as 'Pdf.Dropper.Agent-7216900-0'. Heuristics indicate the presence of embedded JavaScript, which is often used in malicious PDFs to download and execute further stages. The extracted artifact also triggered a ClamAV detection for 'Win.Trojan.Agent-36166', confirming the malicious nature of the payload.

Machine Learning

Nyx PDF Classifier malicious score 0.9999

Heuristics 4

ClamAV: Pdf.Dropper.Agent-7216900-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Dropper.Agent-7216900-0
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` `e502c23d4c08ae01dca9b27ab77a12337fb0d02ed753186d7e70abed6b90a817`	pdf-javascript-stream	PDF /JS object 7 at offset 0x1A5	74553 bytes
Detection ClamAV: Win.Trojan.Agent-36166 Obfuscation or payload: unlikely

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