Malicious PDF — malware analysis report

Static analysis result for SHA-256 1e04589b2d9bdc4d…

MALICIOUS

PDF

7.6 KB Created: 2012-04-17 19:53:38
MD5: 1696d53e9668f09cae9ca72f0f998851 SHA-1: 6f7895bd66e76d6afc986429c1692d6c1ae7b0d3 SHA-256: 1e04589b2d9bdc4d0e1f5979ba61285ee011884f6b592a87bbe190d7fffb1fc5
128 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by multiple engines, including ClamAV which identified it as 'Pdf.Exploit.Dropped-156969-1'. Static analysis revealed an embedded script payload and an embedded file, indicating a likely exploit delivery mechanism. The ML classifier also strongly indicated maliciousness. The document body contains obfuscated text, but the primary threat appears to be the embedded exploit and 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_obj0008.bin
4d613f22dcf8fad2c1e958117b23238614d28110a5d6ec1417ffc749f2450485
pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xBAF 7163 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact contains 4 long base64-like blob(s).