PDF malware analysis — malicious · 282468e96096e467

MALICIOUS

PDF

11.6 KB Created: 2009-02-19 14:45:49 -02:00 Authoring application: Writer (via OpenOffice.org 3.0)

MD5: 96a1abc6c3af8c6fd54c9d05ae90f415 SHA-1: 7f94a0876e2d182e2f9f89cb3c9604205f216e0d SHA-256: 282468e96096e4672f88d88c35e97db64058fc09be708a40038df1f8506f9633

166 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File T1566.001 Spearphishing Attachment

The file is a PDF document that contains embedded JavaScript, as indicated by multiple heuristic firings including PDF_JAVASCRIPT, PDF_JS, and PDF_LAUNCH. The critical ClamAV detection of 'Pdf.Exploit.Agent-35541' strongly suggests a known exploit. The presence of 'eval()' and 'String.fromCharCode' in the JavaScript stream points to obfuscation and dynamic code execution, likely to download and execute a second-stage payload. The extracted artifact 'javascript_obj0027_000.js' is also flagged as suspicious.

Heuristics 7

ClamAV: Pdf.Exploit.Agent-35541 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Exploit.Agent-35541
Launch action high PDF_LAUNCH

PDF contains a /Launch action with an unresolved or extension-less target — treat as potentially dangerous
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. (matched inside decoded stream)
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_obj0027_000.js` `7f40858c02000b2ac5f184110016ec1a841ea589948bcdfc013f0769a5f0e71e`	pdf-javascript-stream	PDF /JS object 27 at offset 0x21C1	15655 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 3 eval/decoder/string-building token(s).

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