PDF malware analysis — malicious · 3aba8466939e4d2a

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: c700b95bfd4c1a785db339539c22e697 SHA-1: ad4d2d9c973908757f5e9b18ff00b73cba70fbda SHA-256: 3aba8466939e4d2a2a43b10830de3cf563b3e3f088e8adcbd9f8f2ed9c351468

208 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

This PDF file was detected as malicious by ClamAV with the signature Pdf.Exploit.Agent-36118. Static analysis revealed embedded JavaScript with eval() calls, indicating the execution of arbitrary code. The JavaScript is likely responsible for downloading and executing a second-stage payload, a common technique for PDF-based exploits. The ML classifier also strongly indicated maliciousness.

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` `fed2d8020e82663b25b397948495c39359723e72c4270a6ccd0bbd8e92ae1455`	pdf-javascript-stream	PDF /JS object 13 at offset 0x336	13474 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 3 eval/decoder/string-building token(s). Carved artifact contains 1 long base64-like blob(s).
`javascript_obj0013_001.js` `82dc5e4b545dc2ec07c162d8cabcfa4490c6314a3af0a42f4b53229f6dc34bb4`	pdf-javascript-stream	PDF /JS object 13 at offset 0x359	14180 bytes
Detection ClamAV: Pdf.Exploit.Agent-36118 Obfuscation or payload: likely Carved artifact contains 3 eval/decoder/string-building token(s). Carved artifact contains 1 long base64-like blob(s).

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