Malicious PDF — malware analysis report

Static analysis result for SHA-256 4b0283d29135077e…

MALICIOUS

PDF

12.6 KB
MD5: 8e9dfdc6b406bc4176951abfad710aaa SHA-1: fa787004c87fb0aad3911094ec81b5e550f59485 SHA-256: 4b0283d29135077ec422f9b5e9ee02bb7b9675b2031e655c2d369f9d1f341a2f
136 Risk Score

Malware Insights

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

The PDF file contains embedded JavaScript, indicated by multiple heuristic firings related to PDF JavaScript actions and streams. ClamAV detections confirm the malicious nature, identifying it as Pdf.Exploit.Agent-36722 and Pdf.Exploit.Pdfka-9. The embedded JavaScript is likely responsible for exploiting a vulnerability within the PDF reader to execute malicious code.

Heuristics 4

  • ClamAV: Pdf.Exploit.Agent-36722 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Exploit.Agent-36722
  • 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
156142bc54b7f864b868baa837da4079f008d363706d99e6779306f1f2b53acd		 pdf-javascript-stream PDF /JS object 76 at offset 0x369 11777 bytes
Detection
ClamAV: Pdf.Exploit.Pdfka-9
Obfuscation or payload: unlikely

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