PDF malware analysis — malicious · d85832531f693128

MALICIOUS

PDF

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

MD5: 2f82b80384ba7526eac1c235ba84b8eb SHA-1: b322ed8af795ea1959f4c5ca1ac58915730cdd18 SHA-256: d85832531f693128853db013f2d4e975c9bb52295240bcd3ce6081e77df836ad

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. Static analysis revealed embedded JavaScript with multiple eval() calls, suggesting obfuscation to hide malicious code. The ML classifier also strongly indicated maliciousness. The primary intent appears to be the execution of this obfuscated JavaScript, which likely downloads and executes a second-stage payload, 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` `42d53d4aa61a4bb961a1a138cfd48c24bf623e3e3a3b6036d8d521f626bc6a9b`	pdf-javascript-stream	PDF /JS object 13 at offset 0x336	13592 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 3 eval/decoder/string-building token(s). Carved artifact contains 14 long base64-like blob(s).
`javascript_obj0013_001.js` `978b98b8a1ff9b0c51136914d62e419764fbd19c1c7afde26ef3d22f539fadb1`	pdf-javascript-stream	PDF /JS object 13 at offset 0x359	14298 bytes
Detection ClamAV: Pdf.Exploit.Agent-36118 Obfuscation or payload: likely Carved artifact contains 3 eval/decoder/string-building token(s). Carved artifact contains 14 long base64-like blob(s).

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