Malicious PDF — malware analysis report

Static analysis result for SHA-256 ddc0e726b4d32ceb…

MALICIOUS

PDF

7.2 KB Created: 2012-04-21 19:58:55
MD5: 0948d74fd9755894be43469d546c66b8 SHA-1: cc61d2d4a48cff07849305e37f9086581df5bdac SHA-256: ddc0e726b4d32cebf598b2e5b0de123c05920f264209a5059d03afc3989e05ef
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 critical ClamAV detection and high ML classifier score indicate maliciousness. The PDF contains an embedded script payload, which is a common technique for delivering second-stage malware. The embedded file, 'embedded_file_obj0006.bin', is likely the dropped payload. The document body text appears to be obfuscated or irrelevant, suggesting the exploit is the primary attack vector.

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_obj0006.bin
7e19462569e95c5d028c1400e114494ed1d657e076961a24bf91fa0b6a4a12d7
pdf-embedded-file PDF EmbeddedFile object 6 at offset 0x9D0 7172 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact contains 4 long base64-like blob(s).