Malicious PDF — malware analysis report

Static analysis result for SHA-256 2f1a64be751ff572…

MALICIOUS

PDF

5.1 KB Created: 2013-10-09 16:18:28
MD5: 4b5684b769683ef8b563d6a61a9d7f73 SHA-1: f3baa472fa5e6a45e336e7b98d092028bfc961cf SHA-256: 2f1a64be751ff572587d3924fa201f5a903c886da896ce8eb5b0f288583648ec
186 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics and a machine learning classifier as malicious. ClamAV detections indicate it is a dropper and exploits CVE-2010-0188. The embedded script payload suggests it is designed to download and execute a second-stage payload, which is a common dropper behavior.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • ClamAV: Pdf.Dropper.Agent-7245016-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Dropper.Agent-7245016-0
  • 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.
  • Embedded script payload in PDF stream medium PDF_EMBEDDED_SCRIPT_PAYLOAD
    PDF stream bytes contain an HTML/XFA <script> tag without accompanying Windows shell-execution primitives — common in accessible XFA forms but worth surfacing for analyst review.
  • Embedded file low PDF_EMBEDDED
    PDF embeds a file attachment — could carry an executable or another weaponised document as a nested payload
  • XFA form low PDF_XFA
    PDF uses XML Forms Architecture — can contain script logic

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
embedded_file_obj0004.bin
ca322869ccadd37bd7800ad6fe52c01689757dcd5ef8f8762eff5e2dc6a4ce16
pdf-embedded-file PDF EmbeddedFile object 4 at offset 0x45C 14762 bytes
Detection
ClamAV: Pdf.Exploit.CVE_2010_0188-10
Obfuscation or payload: unlikely