Malicious PDF — malware analysis report

Static analysis result for SHA-256 c4071cbaa7fa1111…

MALICIOUS

PDF

7.9 KB Created: 2012-04-27 17:25:24
MD5: 6993242c29d3d51d1d6cef749feab16b SHA-1: 1a05dd805b4d5b843387d0525a35c631629e35c2 SHA-256: c4071cbaa7fa11113b3bbc1212f21f1e8a2384c0d9e5bfbf5e584e4c04f51484
98 Risk Score

Malware Insights

MITRE ATT&CK
T1204 Malicious Link T1204.002 Malicious File

The critical ClamAV detection 'Pdf.Exploit.Dropped-156969-1' and the 'PDF_EMBEDDED_SCRIPT_PAYLOAD' heuristic strongly indicate that this PDF is designed to exploit a vulnerability and deliver a secondary payload. The embedded file further supports this, suggesting a dropper or exploit delivery mechanism. The document body content appears to be obfuscated or corrupted, providing no clear user-facing 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
fb05a47dd32651f55b82e21bb14f992cd2fb69a5d85f420280e845ac74c02403
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).