PDF malware analysis — malicious · 88a76acf9cd6b59e

MALICIOUS

PDF

10.7 KB Created: 2008-07-26 19:43:58 Authoring application: Scribus 1.3.3.12 (via Scribus PDF Library 1.3.3.12)

MD5: 309c278ee9d874c321f2d0f9abcc143f SHA-1: 9989bef7f67199b03b1d6d15d73f5402cecd459a SHA-256: 88a76acf9cd6b59ee77b41ae1e8a911e63d95b754c9c4e871e0a060806ed657d

148 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The PDF file contains embedded JavaScript with multiple obfuscation indicators, including eval() calls and string concatenation. Heuristics confirm the presence of JavaScript actions and embedded JS streams, with a high ML score and ClamAV detection as Pdf.Dropper.Agent-7279772-0. The embedded JavaScript is likely responsible for downloading and executing a second-stage payload, as suggested by the 'Script obfuscation indicators' and the presence of the 'javascript_obj0013_000.js' artifact. The attack pattern is consistent with a malicious PDF dropper.

Machine Learning

Nyx PDF Classifier malicious score 1.0000

Heuristics 5

ClamAV: Pdf.Dropper.Agent-7279772-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Dropper.Agent-7279772-0
eval() call high PDF_EVAL

eval() found — commonly used for obfuscated exploit execution
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.
Suspicious extracted artifact info EXTRACTED_FILE_STATIC_TRIAGE

One or more files extracted from inside this sample matched static suspicious-content checks such as script obfuscation, encoded payload blobs, packed data, or execution/download terms.

Extracted artifacts 1

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0013_000.js` `9e125ab1e73d7472d481de3ad76a942a52d1d1dd39a23933ebfefd756f471236`	pdf-javascript-stream	PDF /JS object 13 at offset 0x336	9388 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 eval/decoder/string-building token(s).

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