Malicious PDF — malware analysis report

Static analysis result for SHA-256 cf06ff66827fa9ac…

MALICIOUS

PDF

7.7 KB Created: 2012-04-06 19:15:32
MD5: abb7949ddc950becf37cab6f062dee35 SHA-1: 65590bd527c5bee818d2c272da04fcaaaa32f866 SHA-256: cf06ff66827fa9ac3ed465971e73e2dceea2668d511e804da0e833dcac80d0a4
128 Risk Score

Malware Insights

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

The sample is a PDF file flagged by ClamAV as 'Pdf.Exploit.Dropped-156969-1' and a machine learning classifier with high confidence. Heuristics indicate an embedded script payload and an embedded file, suggesting the PDF is designed to exploit a vulnerability and drop a secondary malicious artifact. The document body contains fragmented text that does not provide specific lures.

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
0b0a6cbcf1e31848648da7985e2a129faf8f02d7c867165708d4f6defb56e52c
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).