PDF malware analysis — malicious · 755a3da11798c749

MALICIOUS

PDF

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

MD5: cf2edeba4af28df012e8040ebf288b99 SHA-1: c055f873dfbd747a7611ae1ee193bac758b0b599 SHA-256: 755a3da11798c7498325810944a8dc13c8f81df664293636fd1aab31b8e07ce6

248 Risk Score

Malware Insights

MITRE ATT&CK

T1059.007 JavaScript T1203 Exploitation for Client Execution T1566.001 Spearphishing Attachment

This PDF file contains embedded JavaScript that is obfuscated and utilizes an eval() call, indicating an attempt to exploit a vulnerability. The JavaScript is designed to download and execute a second-stage payload, as suggested by the 'PDF_LAUNCH' and 'PDF_JS_EXPLOIT_CLUSTER' heuristics. The ClamAV detection 'Pdf.Exploit.Agent-35541' further confirms its malicious nature. The specific payload URL is obfuscated within the script, but the overall behavior points to a downloader or dropper.

Machine Learning

Nyx PDF Classifier malicious score 0.9999

Heuristics 7

PDF JavaScript exploit cluster critical PDF_JS_EXPLOIT_CLUSTER

PDF combines an executable JavaScript/action surface with exploit staging indicators such as eval/unescape/fromCharCode, XFA script content, or a related CVE pattern. Benign form JavaScript remains low-severity, but this correlated cluster is high-confidence malicious behavior.
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.
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` `5d0b1685964eb10b5675d4b8803e391823d7a2e0d8681612a87d33d4d63546be`	pdf-javascript-stream	PDF /JS object 27 at offset 0x1D69	3345 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s).

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