PDF malware analysis — malicious · 2bdbd59bed31570c

MALICIOUS

PDF

14.7 KB Created: 2008-07-26 19:43:58 Authoring application: Scribus 1.3.3.12 (via Scribus PDF Library 1.3.3.12)

MD5: 3813a026d48f63edb6832850cf7827ab SHA-1: 7c329d2a4ea6a170394931c626161e0c95e8e9b2 SHA-256: 2bdbd59bed31570c13678a27919ccab8faa0b8387ee4a9aeaea49eef73969c7f

208 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The PDF contains embedded JavaScript with multiple eval() calls, indicating obfuscated code execution. Heuristics confirm JavaScript actions and eval() usage, and a ML classifier strongly flags it as malicious. ClamAV identifies it as 'Pdf.Exploit.Agent-36118'. The embedded JavaScript is likely responsible for downloading and executing a second-stage payload.

Machine Learning

Nyx PDF Classifier malicious score 1.0000

Heuristics 6

ClamAV: Pdf.Exploit.Agent-36118 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Exploit.Agent-36118
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 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0013_000.js` `5cd5f5a1d7f36fb017703ed9ed6d1941c87db0442851f380e284c16ab0e20911`	pdf-javascript-stream	PDF /JS object 13 at offset 0x336	13457 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 3 eval/decoder/string-building token(s). Carved artifact contains 7 long base64-like blob(s).
`javascript_obj0013_001.js` `61661bdd47d65d82103f49301e8ce9fe5bced2c540cf70476819a7bc882cef9f`	pdf-javascript-stream	PDF /JS object 13 at offset 0x359	14163 bytes
Detection ClamAV: Pdf.Exploit.Agent-36118 Obfuscation or payload: likely Carved artifact contains 3 eval/decoder/string-building token(s). Carved artifact contains 7 long base64-like blob(s).

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