Malicious PDF — malware analysis report

Static analysis result for SHA-256 ad3cbd8f7c6c435e…

MALICIOUS

PDF

7.8 KB Created: 2012-04-27 17:25:24
MD5: fef4fc9bd5e611b2a9543e5e33be8b3e SHA-1: 88e0a96d08f11f27d936d0dd6ce19cf2686f48ab SHA-256: ad3cbd8f7c6c435edc7bca682b2ea9cdc33a8d682144030af0f00eeb6ea556d4
98 Risk Score

Malware Insights

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

The critical ClamAV heuristic 'Pdf.Exploit.Dropped-156969-1' indicates the PDF contains an exploit. Additionally, a PDF_EMBEDDED_SCRIPT_PAYLOAD heuristic was fired, suggesting the PDF contains an embedded script designed to download and execute a secondary payload. The extracted document body text is nonsensical and appears to be obfuscated or corrupted data, further supporting the malicious nature of the file. No specific malware family could be identified.

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
d6b48a6f484594679e9246ce54660f720da8ae1f59c13f26b9c122444053fada
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).