Malicious PDF — malware analysis report

Static analysis result for SHA-256 d19d79d4a6c25320…

MALICIOUS

PDF

7.2 KB Created: 2012-04-21 19:58:55
MD5: 3f74e021b7943a329abd0034b632673e SHA-1: ba74b9a458271089bb3ae8782f492225e98de43e SHA-256: d19d79d4a6c253200bdef9322ebf512811a4432e0f96d180b926e8e482ea51b2
98 Risk Score

Malware Insights

MITRE ATT&CK
T1204 Malicious File T1204.002 Malicious File: User Execution: Malicious Attachment

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 PDF acts as a dropper for a secondary malicious artifact. The document body content is largely obfuscated and does not provide clear user-facing lures.

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
5ca3456cd81a8bdfb3826f6a0e5384bcb726dd0f49f8d76c7ec005efd70fcd49
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).