PDF malware analysis — malicious · a5a10433de3d06ff

MALICIOUS

PDF

14.6 KB Created: 2009-11-15 19:41:70 Authoring application: PDF Library 4.3.9 (via PDF Library 3.9.7)

MD5: 6fb13885ec15d28a7f146b942df9baca SHA-1: 1f6786f4e89c6a0ba44ff33a045c109ef93031ba SHA-256: a5a10433de3d06ff567b0cc9681bd137babfe5aa4ec3965ca2c1f4b15e79eada

136 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The critical ClamAV detections indicate this PDF is a dropper for other malware. The presence of PDF_JAVASCRIPT and PDF_JS heuristics confirms that embedded JavaScript is used, likely to facilitate the download and execution of the secondary payload. The extracted ClamAV signature 'Win.Trojan.Agent-36166' further supports the dropper functionality.

Heuristics 4

ClamAV: Pdf.Dropper.Agent-7289807-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Dropper.Agent-7289807-0
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` `fba6d5ad4fbb9b7330c159db3e4169f07200047308eba9b306376c5986e69430`	pdf-javascript-stream	PDF /JS object 7 at offset 0x1A5	75544 bytes
Detection ClamAV: Win.Trojan.Agent-36166 Obfuscation or payload: unlikely

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