PDF malware analysis — malicious · 4da58eaf7bc8aa59

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: 65631711a7dba70cb163a0c069789707 SHA-1: badcd535ee2c1ace9fea63a7bcecce8d660ca0e1 SHA-256: 4da58eaf7bc8aa5943321993757d4e4a173edb713effaa02b548135bd1547f75

136 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell

The PDF file was detected as malicious by ClamAV with the signature Win.Trojan.Agent-36166. Static analysis revealed embedded JavaScript, which is a common technique for delivering second-stage payloads. The JavaScript action and embedded JS stream heuristics indicate that this script is likely responsible for downloading and executing additional malware. The document body was unreadable, providing no further context.

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` `646839d35fb1bec22d76aabc86704c5879cef4132d42c5af27574c9019a76133`	pdf-javascript-stream	PDF /JS object 7 at offset 0x1A5	74589 bytes
Detection ClamAV: Win.Trojan.Agent-36166 Obfuscation or payload: unlikely

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