PDF malware analysis — malicious · ebb3772e81dff628

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: 757edb9c0d4528603acec84b8c846e28 SHA-1: 831c7bffeca6e7cbb05679d255c40c40718e422b SHA-256: ebb3772e81dff6287d15bdac1351e0b024965a6de3a2519aa2f361a52b90ec2d

138 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell

The PDF file was flagged by ClamAV as Win.Trojan.Agent-36166, indicating a known malicious signature. Additionally, heuristics indicate the presence of embedded JavaScript, suggesting an attempt to execute malicious code. The differential parser also failed, which can sometimes occur with obfuscated or malicious PDFs. The JavaScript stream is large, implying complex malicious functionality.

Heuristics 5

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.
PDF differential parser failed info PDF_DIFFERENTIAL_PARSE_FAILED

The cross-check parser (pdfminer.six) failed on this file: PDF differential parser failed: PSEOF. Static heuristics still ran and any of their findings above are valid; only the differential cross-check signal is missing.

Extracted artifacts 1

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0007_000.js` `aac9f4d7a5fd017bd8b4f3c1fa36e0ed072073c419a7d0509f6412bca554936f`	pdf-javascript-stream	PDF /JS object 7 at offset 0x1A5	74614 bytes
Detection ClamAV: Win.Trojan.Agent-36166 Obfuscation or payload: unlikely

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