Malicious PDF — malware analysis report

Static analysis result for SHA-256 d18637d8045fd967…

MALICIOUS

PDF

7.7 KB Created: 2012-04-17 19:53:38
MD5: 5c89ce0c25d76293adcc7b1f5b548c14 SHA-1: c366aadcc7eaef01d0594f3b42b4991415b2cde2 SHA-256: d18637d8045fd967793e7a19b6a6b92a2ae8e42918b74ce487d7fd56a55d42b9
98 Risk Score

Malware Insights

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

The critical ClamAV detection 'Pdf.Exploit.Dropped-156969-1' strongly indicates this PDF is designed to exploit a vulnerability. The presence of an embedded script payload and an embedded file further supports this, suggesting the document's primary purpose is to deliver and execute a secondary malicious payload. The document body text is largely unreadable, providing no direct clues about the lure.

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
34a84f28b8cfdacb054044b8d221d8c2b36a0b897ed9953f8846ff2b6a7f78d6
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).