PDF malware analysis — malicious · d400f835fa2244f2

MALICIOUS

PDF

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

MD5: fbccc1465921632667c62ec3798c61d4 SHA-1: 7794c4ac7a8026ac3b8e987610f95defacb57533 SHA-256: d400f835fa2244f23e09112f542176c5930e1277a8fdb08510b286d640f5ccaf

208 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

This PDF sample was flagged by ClamAV as Pdf.Exploit.Agent-36118, indicating a known exploit. Heuristics indicate embedded JavaScript with eval() calls, suggesting the script is designed to execute arbitrary code. The ML classifier also strongly indicated maliciousness. The embedded JavaScript likely downloads and executes a second-stage payload, which is a common technique for PDF-based malware delivery.

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` `120a3b20f91ecc4341bfc1b5211d19193d24b3c5a5d73fec5cea99ed09d23fa0`	pdf-javascript-stream	PDF /JS object 13 at offset 0x336	13369 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` `1f24ef4ed40ed7708781c9b4df046b56f757f1f1c3470bcd3d4c3da9568cc58b`	pdf-javascript-stream	PDF /JS object 13 at offset 0x359	14075 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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