Malicious PDF — malware analysis report

Static analysis result for SHA-256 556135fd1faa1ca7…

MALICIOUS

PDF

7.8 KB Created: 2012-04-06 19:15:32
MD5: 841a14fbb19fd04584a1d90bcc5efa30 SHA-1: 8d8c5cefa9afe8b85cc8b1d34364f6c6d76c2aa8 SHA-256: 556135fd1faa1ca7b231b650ac3d83091c7c4c52d854296f9fc331cb0f30db20
98 Risk Score

Malware Insights

MITRE ATT&CK
T1204.002 Malicious File T1566.001 Spearphishing Attachment T1059.001 PowerShell

The file is identified as malicious by ClamAV with the signature Pdf.Exploit.Dropped-156969-1, indicating it exploits a known PDF vulnerability. The PDF contains an embedded script payload, which is a common technique for delivering secondary malware. The document body contains text that appears to be unrelated to the malicious functionality, suggesting it might be a lure or filler content.

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
8ecca8ddcb565823eb3741b1d971f84525606283572e658fcae4e363cb939086
pdf-embedded-file PDF EmbeddedFile object 10 at offset 0xC8A 6998 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact contains 4 long base64-like blob(s).