Malicious PDF — malware analysis report

Static analysis result for SHA-256 53902b87969fe3e6…

MALICIOUS

PDF

7.8 KB Created: 2012-04-27 17:25:24
MD5: 42e4960836735b7fe81c10f8069a75f1 SHA-1: d2cad75894d2028b7098c9cc808bb5cfd0ede0c8 SHA-256: 53902b87969fe3e6f18b9127e3dddf0c743a93f0af990d7e9b3b1aa88870dfe6
98 Risk Score

Malware Insights

MITRE ATT&CK
T1204 Malicious File Execution T1204.002 Malicious File Execution: Malicious PDF

The critical ClamAV detection 'Pdf.Exploit.Dropped-156969-1' and the 'PDF_EMBEDDED_SCRIPT_PAYLOAD' heuristic indicate that this PDF contains an embedded script designed to exploit vulnerabilities. This script likely downloads and executes a secondary payload, as suggested by the 'Suspicious extracted artifact' heuristic noting a long encoded blob and an embedded file. The document body text is truncated and does not provide further context on 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_obj0010.bin
d96339b4dbccbe698cec066535c1a62eb54afaeb2634891fa4aa7020b876a735
pdf-embedded-file PDF EmbeddedFile object 10 at offset 0xCB8 7237 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact contains 4 long base64-like blob(s).