PDF malware analysis — malicious · 90f1c20e74dcd1dd

MALICIOUS

PDF

7.0 KB Created: 2008-31-20 53:85:00 Authoring application: Scribus 1.3.3.12 (via Scribus PDF Library 1.3.3.12)

MD5: 46d904bf25e0e73e823a689b790c8b29 SHA-1: a7dd7c620b703b1dd54e884dade6c1737839dac2 SHA-256: 90f1c20e74dcd1dd31c2828e8512f32c043db8f86ae6ca1a02c74d8ad1080690

178 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The sample is a PDF file that contains embedded JavaScript. Heuristics indicate the presence of JavaScript actions, embedded JS streams, and critically, an eval() call, which is often used to deobfuscate and execute malicious code. ClamAV detection confirms this, identifying the file as 'Pdf.Exploit.Agent-35587'. The obfuscated JavaScript is likely designed to download and execute a second-stage payload, a common technique for PDF-based malware.

Heuristics 6

ClamAV: Pdf.Exploit.Agent-35587 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Exploit.Agent-35587
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 1

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0013_001.js` `174080f7b1c39e1489df74c4cf0281f90f460deacc69da5af78f8d8f66106eb0`	pdf-javascript-stream	PDF /JS object 13 at offset 0x392	5578 bytes
Detection ClamAV: Pdf.Exploit.Agent-35587 Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).

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