PDF malware analysis — malicious · cb55d6dfc757d5ba

MALICIOUS

PDF

15.1 KB Created: 2010-02-15 10:56:32

MD5: c391f939e6eab413fe7b72a043da1530 SHA-1: b7ddb6e1109c577da4857dcc203ffc1f677950b4 SHA-256: cb55d6dfc757d5ba43b54b67980ba164625ca71e7c99eea57535caf9c45ffa42

148 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell

The PDF contains embedded JavaScript, which is flagged by multiple heuristics including PDF_JAVASCRIPT, PDF_JS, and PDF_EVAL due to the use of eval(). The ML classifier and ClamAV detection strongly indicate maliciousness, identifying it as a dropper. The JavaScript is obfuscated, but the presence of eval() suggests it's designed to download and execute a second-stage payload. The ClamAV detection name 'Pdf.Dropper.Agent-7304299-0' is included as an IOC.

Machine Learning

Nyx PDF Classifier malicious score 1.0000

Heuristics 5

ClamAV: Pdf.Dropper.Agent-7304299-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Dropper.Agent-7304299-0
eval() call high PDF_EVAL

eval() found — commonly used for obfuscated exploit execution (matched inside decoded stream)
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 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0023_000.js` `20cb0f00a4cc9a92074db2683c20045ee4dff94a7acb687fde97286bc31460db`	pdf-javascript-stream	PDF /JS object 23 at offset 0x3654	97 bytes
`stream_009_off00003845.js` `dcf566fe813d071a857f4b210115f5abb60fa42cb9c51de04e8c7e70a1eaf0de`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x3845	311 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s).

Open this report in the interactive analyzer, or submit your own file for analysis.