PDF malware analysis — malicious · f5d3b1a24eac5b13

MALICIOUS

PDF

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

MD5: 3813becbf5f702cf5d3a6b431b194678 SHA-1: e06a040006faa1a13ffdd5ed79e5b75c4e9cecf6 SHA-256: f5d3b1a24eac5b1394d3e96378df1df68d1d968c5d9bbbdd13ef2857376e1328

196 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The PDF contains embedded JavaScript with eval() calls and fromCharCode usage, indicating obfuscated malicious code. The 'PDF_LAUNCH' and 'PDF_JAVASCRIPT' heuristics, along with the 'ML_NYX_PDF_MALICIOUS' score and ClamAV detection (Pdf.Exploit.Agent-35541), strongly suggest exploitation of a PDF vulnerability. The embedded JavaScript is likely designed to download and execute a secondary payload, as indicated by the 'ML_NYX_PDF_MALICIOUS' model and the presence of an extracted JavaScript file.

Machine Learning

Nyx PDF Classifier malicious score 0.9999

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` `330c6be01cfe8bf6848922c10024ef4561e768b4e4cbc5e24cc9426611ab618f`	pdf-javascript-stream	PDF /JS object 27 at offset 0x1D69	7371 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 eval/decoder/string-building token(s).

Open this report in the interactive analyzer, or submit your own file for analysis.