PDF malware analysis — malicious · 9b00beabad25558c

MALICIOUS

PDF

7.1 KB Created: 2008-31-20 53:85:00 Authoring application: Scribus 1.3.3.12 (via Scribus PDF Library 1.3.3.12)

MD5: e7e6e15c3290372336af0dc57a52b363 SHA-1: 2070a853d6dc01b0777c826b4f95713c19ad8bcc SHA-256: 9b00beabad25558c0ffe28057da7cd0648892d717a6399c4c564077663a54044

210 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 JavaScript/Shell Scripting: JavaScript T1059.003 Command and Scripting Interpreter: Windows Command Shell

The PDF file was flagged as malicious by ClamAV with the signature Pdf.Exploit.Agent-35587. Static analysis revealed embedded JavaScript with obfuscated eval() calls, indicating an attempt to execute arbitrary code. The ML classifier also strongly indicated maliciousness. The primary intent appears to be exploiting a vulnerability within the PDF reader to download and execute a secondary payload.

Machine Learning

Nyx PDF Classifier malicious score 1.0000

Heuristics 6

ClamAV: Pdf.Exploit.Agent-35587 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Exploit.Agent-35587
ClamAV detection on extracted artifact critical EXTRACTED_FILE_CLAMAV

ClamAV flagged at least one file extracted from inside this sample. Even when the wrapping document carries no AV detection of its own, a hit on the carved artifact is a strong indicator the sample is a delivery vehicle.
eval() call high PDF_EVAL

eval() found — commonly used for obfuscated exploit execution
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_obj0013_001.js` `4a6a761a93d9a82ba795ac5bac136680cb7e8dca02c11ac2e57e6cabd7c10071`	pdf-javascript-stream	PDF /JS object 13 at offset 0x38C	5781 bytes
Detection ClamAV: Pdf.Exploit.Agent-35587 Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).

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