PDF malware analysis — malicious · 587824c07f5b1a59

MALICIOUS

PDF

12.1 KB Created: 2010-07-07 07:53:55 Authoring application: eglaazhfNxZToheMem (via UduCwCDtlRDZB)

MD5: b549eea6f1bedb75e62f4e65e236ffa3 SHA-1: a925aa5ce22486c5842715fbdc7206b6e04bcfd0 SHA-256: 587824c07f5b1a592e8e3bdc06212c1aff048af5252efc1d6ed24aa84a4b7e59

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, specifically targeting a PDF exploit (Pdf.Exploit.Agent-35572). The embedded JavaScript, named javascript_obj0007_000.js, is likely responsible for downloading and executing a secondary payload, a common technique for initial access.

Machine Learning

Nyx PDF Classifier malicious score 1.0000

Heuristics 5

ClamAV: Pdf.Exploit.Agent-35572 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Exploit.Agent-35572
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` `f242163fcc3658dc43eb20c64d8497a794632ce4a1aa4f8fc9d2eb8ab9f7020e`	pdf-javascript-stream	PDF /JS object 7 at offset 0x55D	10246 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 eval/decoder/string-building token(s).

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