Malicious PDF — malware analysis report

Static analysis result for SHA-256 e92f6272e601fd8c…

MALICIOUS

PDF

12.6 KB
MD5: a61b16846406d047e9196d97cf4bf8d5 SHA-1: 0e68313495448df89cb31c56a16b2a7ec814e66f SHA-256: e92f6272e601fd8c7c0d63945ba213c8ca75ac8ef25734b1143671903cd63e4d
166 Risk Score

Malware Insights

MITRE ATT&CK
T1204.002 Malicious File: Malicious JavaScript

The PDF file contains embedded JavaScript, indicated by multiple heuristic firings and the presence of an extracted JavaScript file. ClamAV detections further confirm its malicious nature, specifically identifying it as a PDF exploit. The embedded JavaScript is the primary mechanism for delivering the malicious payload, likely involving the download and execution of additional malware.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • ClamAV: Pdf.Exploit.Agent-36365 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Exploit.Agent-36365
  • 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_obj0076_000.js
d5330a73c399524842b24bcfbdba397b6585bd693e121f61defaec57e061d22c
pdf-javascript-stream PDF /JS object 76 at offset 0x369 11850 bytes
Detection
ClamAV: Pdf.Exploit.Agent-36364
Obfuscation or payload: unlikely