PDF malware analysis — malicious · e66d69c929abaef8

MALICIOUS

PDF

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

MD5: 7a5b265deaf64a1a9c49d6bce5241395 SHA-1: 61bbf7d3a2eab4215d6ef21f24911d325013a25e SHA-256: e66d69c929abaef8c4f9c09f0578ee0f87ab5c469d3f2626297f98249a8f182c

166 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The PDF file contains embedded JavaScript, which is obfuscated and uses eval() and String.fromCharCode(). This indicates an attempt to execute arbitrary code. ClamAV detection as 'Pdf.Exploit.Agent-35541' further supports the malicious nature. The primary attack pattern involves exploiting a PDF vulnerability to run this script, likely to download and execute a second-stage payload.

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` `f79c7b30c18422c109a9a4cdf4965d0f8937fc4dd5d8edc629ab0ffa222806cb`	pdf-javascript-stream	PDF /JS object 27 at offset 0x21C1	6728 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 3 eval/decoder/string-building token(s).

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