PDF malware analysis — malicious · c11a11085378fa27

MALICIOUS

PDF

9.7 KB Created: 2009-03-20 21:10:51 Authoring application: WhEVITxQEotLHH (via OGPbcphIYjeZBmN)

MD5: 640e010e1e35e43bfd83bcff85c96b6b SHA-1: 49028fd7b385fe1fd9ba82928b1d20f4e24fdaf9 SHA-256: c11a11085378fa27ae241675e883dc59996c59e0675ccedbacaafbca809aa7a4

86 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The PDF file contains embedded JavaScript, indicated by multiple heuristic firings and the presence of an extracted JavaScript file. The ClamAV detection 'Pdf.Exploit.Agent-35572' strongly suggests exploitation of a known PDF vulnerability. The embedded JavaScript is likely responsible for downloading and executing a second-stage payload, though its exact function is obscured by obfuscation.

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` `8ca64e77eca76f8a12ce0e9a69170c23dbed89b8e6cd90a2331f7ab4e8eccee6`	pdf-javascript-stream	PDF /JS object 7 at offset 0x444	8041 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 eval/decoder/string-building token(s).

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