Malicious PDF — malware analysis report

Static analysis result for SHA-256 c71b006bf5ee24ec…

MALICIOUS

PDF

7.2 KB Created: 2012-04-21 19:58:55
MD5: 20cfcdef8c11bbbd34d27d99e95e41e0 SHA-1: 017b449ee74ca383f80a472a9d89f53145335513 SHA-256: c71b006bf5ee24ecc04735c356c958e0de8a110ef94916bb42061e22124efaeb
130 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious File

The PDF file was flagged by multiple heuristics, including ML classification and ClamAV, indicating malicious intent. The 'PDF_EMBEDDED_SCRIPT_PAYLOAD' and 'EXTRACTED_FILE_STATIC_TRIAGE' heuristics suggest the presence of embedded malicious code or an executable payload within the PDF stream. The ClamAV detection name 'Pdf.Exploit.Dropped-156969-1' further supports that this PDF is designed to drop or execute other malware.

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
f0a77b04b1d26124c89ab2016fafb52ae3691c41684c2c771fbd4a977cc846f8
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).