PDF malware analysis — malicious · db70322fffc5b35e

MALICIOUS

PDF

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

MD5: d928cd3fec9f18ecc0ceb078d69bbabb SHA-1: cc8b4c0f545fbf83364661e3821244788ce920cc SHA-256: db70322fffc5b35e977866efe5c63a3f576f56bc36ab78f51a6129b4ea74df49

208 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The PDF contains embedded JavaScript with multiple eval() calls, indicating obfuscated code execution. Static analysis heuristics and a machine learning classifier strongly indicate maliciousness, with ClamAV identifying it as Pdf.Exploit.Agent-35587. The embedded JavaScript likely attempts to download and execute a second-stage payload, a common technique for exploiting PDF vulnerabilities.

Machine Learning

Nyx PDF Classifier malicious score 1.0000

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` `378f10697d76aeaaeb671e78ef7ce8444b189ca8db6a3757f730bfded9584231`	pdf-javascript-stream	PDF /JS object 13 at offset 0x38E	5751 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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