PDF malware analysis — malicious · 0500981330a18e7b

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: 2d02b773c13dcd743793cf2ff8dd5c18 SHA-1: 668b190e74533fd5cb9eb38a7d4899a48a577af0 SHA-256: 0500981330a18e7bfaa9d15d712239fe81c3bea344a9a180c3d365985509ae69

166 Risk Score

Malware Insights

MITRE ATT&CK

T1059.007 JavaScript T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The file is identified as a malicious PDF by multiple heuristics and ClamAV, with a high ML classifier score. The embedded JavaScript, although obfuscated, is designed to download and execute a secondary payload, as indicated by the 'Pdf.Dropper.Agent-7223982-0' and 'Win.Trojan.Agent-36166' detections. This suggests the PDF is a dropper intended for initial execution of further malware.

Machine Learning

Nyx PDF Classifier malicious score 0.9999

Heuristics 4

ClamAV: Pdf.Dropper.Agent-7223982-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Dropper.Agent-7223982-0
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` `f9c91db80f909aee823f30929cb14c61edd615953cbf1ef57a1b7ee1a23e54e8`	pdf-javascript-stream	PDF /JS object 7 at offset 0x1A5	75059 bytes
Detection ClamAV: Win.Trojan.Agent-36166 Obfuscation or payload: unlikely

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