PDF malware analysis — malicious · ce88a435a5078c56

MALICIOUS

PDF

7.7 KB Created: 2009-12-03 19:49:10 Authoring application: PDF Library 10.2.4 (via PDF Library 4.10.7)

MD5: a1c7fed22b019ec584f48c56a7226a1d SHA-1: 265cd5cb25d7fc7d95ca999d245aa0714589c566 SHA-256: ce88a435a5078c569737008a1f7028f8ecf1ae0b0ccc2d206e5eb31861ab59f8

146 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as Pdf.Exploit.Agent-11201. Static analysis detected embedded JavaScript and the use of ASCIIHexDecode filters, indicating an attempt to obfuscate malicious code. The embedded JavaScript is likely responsible for downloading and executing a second-stage payload, which is a common attack pattern for PDF-based malware.

Machine Learning

Nyx PDF Classifier malicious score 1.0000

Heuristics 5

ClamAV: Pdf.Exploit.Agent-11201 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Exploit.Agent-11201
ASCIIHexDecode filter (with exploit indicators) medium PDF_FILTER_HEX

Hex-encoding filter present alongside exploit delivery indicators — often used to hide payload or shellcode bytes
Suspicious extracted artifact medium 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.
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.

Extracted artifacts 1

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0007_000.js` `3c2e8583f172aa71d92bdef6ebdfb6fb23a73be1e73a44a11380bfc96a1e0d86`	pdf-javascript-stream	PDF /JS object 7 at offset 0x268	37689 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 long hex-escaped blob(s).

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