Malicious PDF — malware analysis report

Static analysis result for SHA-256 2535217add54658a…

MALICIOUS

PDF

7.8 KB Created: 2012-04-27 17:25:24
MD5: e8e980b300b581ef5ee5cf089fa47e11 SHA-1: 986756227353f8b926ac9d03e752dd3440965df1 SHA-256: 2535217add54658aab57c5ec57a7c7ea421e929d5e0ead5470d729151b85a023
130 Risk Score

Malware Insights

MITRE ATT&CK
T1204 Malicious File Execution T1059 Command and Scripting Interpreter T1566 Phishing

The critical ClamAV detection and high ML classifier score strongly indicate malicious intent. The PDF contains an embedded script payload, which is a common technique for delivering secondary malware. The embedded file artifact further supports the dropper functionality. The document body text appears to be unrelated filler content, suggesting the exploit is the primary mechanism for infection.

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_obj0010.bin
ff91d1d1563d798da65a1e6fd2126d9e5ae39fe0b7b2ba66af68c0af9aa830e8
pdf-embedded-file PDF EmbeddedFile object 10 at offset 0xCB8 7229 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact contains 4 long base64-like blob(s).