PDF malware analysis — malicious · e24da0324995fa14

MALICIOUS

PDF

9.5 KB Created: 2009-07-26 22:01:26 Authoring application: NxjYDAGQOEZEynv (via bDQVACIKJKTs)

MD5: aef3f42858d9a40bc54f761913cab19b SHA-1: e679a32d40a04f20f4ce53ce61b72ac8f5d4709c SHA-256: e24da0324995fa14b7981cbc49eb344cf9058223c1663c6176c576b28120fe75

116 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The file is a PDF containing embedded JavaScript, as indicated by multiple heuristic firings including PDF_JAVASCRIPT and PDF_JS. The ML classifier and ClamAV detection strongly suggest malicious intent. The embedded JavaScript file, 'javascript_obj0007_000.js', is the primary artifact, and its presence along with the PDF structure points to a dropper mechanism designed to download and execute further malicious content.

Machine Learning

Nyx PDF Classifier malicious score 1.0000

Heuristics 5

ClamAV: Pdf.Dropper.Agent-7315269-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Dropper.Agent-7315269-0
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.
String.fromCharCode low PDF_FROMCHARCODE

String.fromCharCode found — used to construct payload strings dynamically. Common in benign JavaScript libraries for codepoint manipulation, so this alone is informational; weaponised use is also caught by the dedicated fromCharCode-stage and exploit-shape 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_obj0007_000.js` `dff4aa376189c83625f2109f41376e5d22c33be853df6384ea4042fe590b4db4`	pdf-javascript-stream	PDF /JS object 7 at offset 0x499	7805 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 3 eval/decoder/string-building token(s).

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