PDF malware analysis — malicious · 01ff4b098d0e373c

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: cbc931623b26da8a2f23cea7369f1cc6 SHA-1: a6f7f774c5c4e62afdff7c8485cdda2681594e0e SHA-256: 01ff4b098d0e373c9888867b512cc6e493a834e8e1ff72a9b788e70c73ab73fc

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 malicious by multiple heuristics, including a critical ClamAV detection for 'Win.Trojan.Agent-36166'. Embedded JavaScript was extracted, which is highly indicative of a downloader or exploit execution. The ML classifier also strongly flagged this PDF as malicious. The primary function appears to be executing a malicious script, likely leading to the download of a secondary payload.

Machine Learning

Nyx PDF Classifier malicious score 0.9999

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` `7b0e36c38bbdb0d8beedb5d54b109ab7dad7aab6964483a45b797ad46bfa7073`	pdf-javascript-stream	PDF /JS object 7 at offset 0x1A5	74628 bytes
Detection ClamAV: Win.Trojan.Agent-36166 Obfuscation or payload: unlikely

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