Malicious PDF — malware analysis report

Static analysis result for SHA-256 f19467491067ec72…

MALICIOUS

PDF

7.9 KB Created: 2012-04-27 17:25:24
MD5: 218ebda7c8fae51442815d53308e3c3b SHA-1: 72162007ccf9ebc657f46099d9534de25faf0f91 SHA-256: f19467491067ec7291d1dd5dac3c26f6772585f31704ba3375ba7f9ef2aa60ea
130 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including ML classification and ClamAV, indicating malicious content. The 'PDF_EMBEDDED_SCRIPT_PAYLOAD' and 'EXTRACTED_FILE_STATIC_TRIAGE' heuristics suggest the presence of an embedded script or payload within the PDF stream, likely intended for execution. The ML classifier's high confidence score further supports the malicious nature of the file, which is identified as Pdf.Exploit.Dropped-156969-1 by ClamAV.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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
8ba5fd507ab031fa282f936852bda56e18da64f796cf0862f9c51732fa6aec59
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).