PDF malware analysis — malicious · e8daffdd81c6cbb7

MALICIOUS

PDF

17.0 KB Created: 2010-03-14 21:18:34 Authoring application: bfaRcD (via Ck4yCls)

MD5: 768b9b6d1da9288812872789d7be4c86 SHA-1: c9989d3eef2e978291c5a24058c6ece9de02b8b5 SHA-256: e8daffdd81c6cbb7804723caa012c5e3157c1069cc40349f049510a1c1346a44

126 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 including PDF_JAVASCRIPT, PDF_JS, and PDF_EVAL. The critical ClamAV detection of 'Pdf.Exploit.Agent-15661' strongly suggests exploitation of a known PDF vulnerability. The embedded JavaScript, identified as 'javascript_obj0007_000.js', is likely responsible for downloading and executing a secondary payload, a common technique for initial access.

Heuristics 6

ClamAV: Pdf.Exploit.Agent-15661 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Exploit.Agent-15661
eval() call high PDF_EVAL

eval() found — commonly used for obfuscated exploit execution (matched inside decoded stream)
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` `cfdb310784172f711aab176f9238d89b8ab1c3b276db366421c011775e8fc287`	pdf-javascript-stream	PDF /JS object 7 at offset 0x241	16162 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 eval/decoder/string-building token(s).

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