PDF malware analysis — malicious · ffd9fbca0b1cee08

MALICIOUS

PDF

7.3 KB Created: 2010-09-16 18:52:20 Authoring application: Qabifagevafa (via 9c449Tiqotezozav)

MD5: bc3b0c7fe035f54f71b38f2cbddf487d SHA-1: c6e2b398343caeef6855ee3ef6ba9dea6076becb SHA-256: ffd9fbca0b1cee08111f149c3e9fc756540091394f0bb7f319cd1b177ec89cd6

106 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1566.001 Spearphishing Attachment T1204.002 Malicious File

The PDF file was flagged by multiple heuristics, including a critical ClamAV detection for obfuscated objects and a high ML score, indicating malicious intent. The presence of embedded JavaScript, identified as 'javascript_obj0011_000.js', strongly suggests an attempt to execute arbitrary code. While the exact script functionality is obfuscated, such embedded scripts in PDFs are commonly used to download and execute further malicious payloads, aligning with common attack patterns for PDF-based malware delivery.

Machine Learning

Nyx PDF Classifier malicious score 0.9950

Heuristics 3

ClamAV: Heuristics.PDF.ObfuscatedNameObject critical CLAMAV_DETECTION

ClamAV detected this file as malware: Heuristics.PDF.ObfuscatedNameObject
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_obj0011_000.js` `ff85b44f7d06834e69a161aee8e28b7340c56fef50ee1649100cb6f376ea5386`	pdf-javascript-stream	PDF /JS object 11 at offset 0x1364	2324 bytes

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