PDF malware analysis — malicious · 9e1ff971db04026c

MALICIOUS

PDF

15.9 KB Created: 2009-08-15 15:24:23 Authoring application: MjWJeilfqbVDNLql (via EkFThvGnSLTpiH)

MD5: bb9bb04a34339c9cfe77e2c5c4e65b63 SHA-1: eeb2dcea607b511749a9a212bd4d9f272ae694f5 SHA-256: 9e1ff971db04026c4401cf597fb15f92affcfc7b186a9bd24bea0c2ff1d168e4

116 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The file is a PDF containing embedded JavaScript, flagged by multiple heuristics including ML classification and ClamAV detection as Pdf.Exploit.Agent-1465. The embedded JavaScript, identified as javascript_obj0007_000.js, is likely responsible for exploiting a PDF vulnerability to download and execute a secondary payload. The ML classifier's high confidence score supports this assessment.

Machine Learning

Nyx PDF Classifier malicious score 1.0000

Heuristics 5

ClamAV: Pdf.Exploit.Agent-1465 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Exploit.Agent-1465
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` `1aea5a7e8a6abab8f46b252e29a2fa08be5bbe260b22db0384cdaf0c8b64c5b0`	pdf-javascript-stream	PDF /JS object 7 at offset 0x2A5	14896 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s). Carved artifact contains 1 long base64-like blob(s).

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