PDF malware analysis — malicious · c972c9b53ab98da7

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: 578bce2cfe7027dc402994256ea00981 SHA-1: 79031ed09f3e78c48db2e3d4f50bc061b5e7ae81 SHA-256: c972c9b53ab98da777904d3ade5aa3419bbccfefe9d4ef08f06acfc700dbc792

136 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The PDF file was detected as malicious by ClamAV with the signature Win.Trojan.Agent-36166. Static analysis revealed embedded JavaScript, which is commonly used to download and execute further malicious content. The presence of PDF-specific JavaScript actions and embedded JS streams strongly suggests this is the intended delivery mechanism.

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` `7500e3a759fd6644c880eb3bdcef60ba84138661d53de692d9d9e1512723b728`	pdf-javascript-stream	PDF /JS object 7 at offset 0x1A5	74406 bytes
Detection ClamAV: Win.Trojan.Agent-36166 Obfuscation or payload: unlikely

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