Malicious PDF — malware analysis report

Static analysis result for SHA-256 bb58c7a07896ae07…

MALICIOUS

PDF

6.1 KB Authoring application: Favib rela (via Pipnolpamok)
MD5: d9d0eade7e521d22ee8d4b60625d1aef SHA-1: 9bd8ca6436f89099df381429ddf142b5de40ee5c SHA-256: bb58c7a07896ae079b5c01bd2d005fdf15a96f61356f5254ffa4aac7438be502
166 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell T1204.002 Malicious File

This PDF file was flagged by ClamAV as Pdf.Exploit.Agent-36174, indicating it contains a known exploit. Static analysis also identified embedded JavaScript, which is commonly used in PDF exploits to download and execute malicious payloads. The ML classifier strongly supports the malicious verdict. The specific exploit and payload are not detailed in the provided evidence, but the presence of JavaScript and the ClamAV signature strongly suggest a malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • ClamAV: Pdf.Exploit.Agent-36174 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Exploit.Agent-36174
  • 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.
  • 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.

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
javascript_obj0015_000.js
d2679f3f15d6e025ee8c17fa18b94c5a0f309ff0925fe97138da94e5b5bbdf34
pdf-javascript-stream PDF /JS object 15 at offset 0x1281 1504 bytes
Detection
ClamAV: Pdf.Exploit.Agent-36174
Obfuscation or payload: unlikely