PDF malware analysis — malicious · 300c49791d2ee8d1

MALICIOUS

PDF

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

MD5: 2e5f2113e9fdf8a55476b45091cf2f0d SHA-1: 1ffb98ef641e41304198198a8adc3f3c6d8abd32 SHA-256: 300c49791d2ee8d1e27d81e7d2f457e4e6a53d5b63e312684c74c5675a93befe

208 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The PDF file contains embedded JavaScript with multiple eval() calls, indicating obfuscated code execution. Heuristics confirm the presence of JavaScript actions and streams, and a machine learning classifier flagged it as highly malicious. ClamAV detection as 'Pdf.Exploit.Agent-36118' strongly suggests it's a known exploit. The script likely downloads and executes a secondary payload, a common technique for initial access.

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` `5b8f4bce00cad6b12596ec1bec6ae7bbcb47ecc2c7e4ccb8722351e3d0033844`	pdf-javascript-stream	PDF /JS object 13 at offset 0x336	13321 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 3 eval/decoder/string-building token(s). Carved artifact contains 15 long base64-like blob(s).
`javascript_obj0013_001.js` `475d87b91f4294df5ca81c4e5bfc17522a6bbff604eb87f8d6288d603f85dd03`	pdf-javascript-stream	PDF /JS object 13 at offset 0x359	14027 bytes
Detection ClamAV: Pdf.Exploit.Agent-36118 Obfuscation or payload: likely Carved artifact contains 3 eval/decoder/string-building token(s). Carved artifact contains 15 long base64-like blob(s).

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