Malicious PDF — malware analysis report

Static analysis result for SHA-256 aa10d2793615cff3…

MALICIOUS

PDF

7.9 KB Created: 2012-04-27 17:25:24
MD5: 990217aaf52fddef592c3d7e0f968cf5 SHA-1: 8a33dae9a943d66659de83c0b7b4e81bc2978737 SHA-256: aa10d2793615cff3b59da346929048cb47b3755758e281691e4d0aab1c2d0e53
128 Risk Score

Malware Insights

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

The PDF sample was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Exploit.Dropped-156969-1' and an ML classifier indicating high maliciousness. An embedded script payload was also detected. These indicators strongly suggest the document is designed to exploit a vulnerability and deliver a secondary malicious payload.

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
af4eaae3d532aa0013a21e5215f6c07eb9b9dcc48ab75fd599a3b17b31d89201
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).