PDF malware analysis — malicious · 209d8c68a4eddf2b

MALICIOUS

PDF

10.0 KB Created: 2010-02-15 04:09:20 Authoring application: SYpcrzpjviIxkhix (via sHASRRJXEjaIZPlz)

MD5: fbca6bdcfd12c2e3d82aa7444949ee9c SHA-1: cf25e244910e83541fb7e37547a74db8d217c75e SHA-256: 209d8c68a4eddf2b48eb91ff57036afddb8723ee23b5187edee8ca67cd8c3828

116 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The PDF file was flagged by ClamAV as Pdf.Exploit.Agent-35572 and a machine learning classifier indicated a high probability of maliciousness. Heuristics indicate the presence of embedded JavaScript, including the use of String.fromCharCode, which is often used for obfuscation. The embedded JavaScript stream, named javascript_obj0007_000.js, is likely responsible for executing the exploit.

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` `4f20d1e466ecdcbd6f277598269dafc181679ac8e61100f31ca4eff12ce4b2cc`	pdf-javascript-stream	PDF /JS object 7 at offset 0x51F	8103 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 eval/decoder/string-building token(s).

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