Malicious PDF — malware analysis report

Static analysis result for SHA-256 afb8c12b2ee5f301…

MALICIOUS

PDF

389.1 KB
MD5: 3ec74dc458b8cc70685999a71b041a99 SHA-1: 11471b6081e1c8fd5f96e3b43c1ac16c51e22dcb SHA-256: afb8c12b2ee5f301d26a073e3415c87b02819be539a66dbbe466f4274fa98567
156 Risk Score

Malware Insights

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

The PDF file contains embedded JavaScript and utilizes ASCIIHexDecode filters, indicating an attempt to obfuscate malicious code. ClamAV detection as 'Pdf.Exploit.Agent-36175' strongly suggests exploitation of a PDF vulnerability to execute arbitrary code. The embedded JavaScript is the primary mechanism for this execution, likely leading to a secondary payload download or execution.

Heuristics 5

  • ClamAV: Pdf.Exploit.Agent-36175 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Exploit.Agent-36175
  • 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.
  • ASCIIHexDecode filter (with exploit indicators) medium PDF_FILTER_HEX
    Hex-encoding filter present alongside exploit delivery indicators — often used to hide payload or shellcode bytes
  • 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_obj0008_000.js
3dc5030a4bdb8483d31e90d08f055fe5a056bb3027dd5f3fa0441f04ed80bac4
pdf-javascript-stream PDF /JS object 8 at offset 0x1E7 132542 bytes
Detection
ClamAV: Pdf.Exploit.Agent-36175
Obfuscation or payload: unlikely