Malicious PDF — malware analysis report

Static analysis result for SHA-256 2b4e3109209fc41a…

MALICIOUS

PDF

7.6 KB Created: 2012-04-17 19:53:38
MD5: b6d6b074367d0f7ce5dad5314dc45b42 SHA-1: c6b7e5c493f21f11a6aa350d972528cc1af89d8c SHA-256: 2b4e3109209fc41a2bbe3b3d33eff0ce8d3ab063b8a4d5f1fbf95ce9e416112c
128 Risk Score

Malware Insights

MITRE ATT&CK
T1204 Malicious File T1204.002 Malicious File: User Execution T1059 Command and Scripting Interpreter T1059.001 Command and Scripting Interpreter: PowerShell

The file is identified as malicious by ClamAV with the signature Pdf.Exploit.Dropped-156969-1, and a machine learning classifier also flagged it with high confidence. The PDF contains an embedded script payload, indicating an attempt to exploit a vulnerability. The embedded artifact 'embedded_file_obj0008.bin' likely contains the second-stage payload.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • ClamAV: Pdf.Exploit.Dropped-156969-1 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Exploit.Dropped-156969-1
  • 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
  • Suspicious extracted artifact info EXTRACTED_FILE_STATIC_TRIAGE
    One or more files extracted from inside this sample matched static suspicious-content checks such as script obfuscation, encoded payload blobs, packed data, or execution/download terms.

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
embedded_file_obj0008.bin
c9472948c033256f9e3d1c063821f4421d9e1c28d0362c1a010b64688db5b443
pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xBAF 7163 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact contains 4 long base64-like blob(s).