Malicious PDF — malware analysis report

Static analysis result for SHA-256 2900c1c397db7a4d…

MALICIOUS

PDF

7.8 KB Created: 2012-04-27 17:25:24
MD5: 305bc4d06b368fd9d0eb0fb4d89cc3d3 SHA-1: c85c8baaf4fbad8b0e848238b8bd4db38251a078 SHA-256: 2900c1c397db7a4daf778251f7948d3b1e027d4b0e6f271c7be3f340bfaaf221
128 Risk Score

Malware Insights

MITRE ATT&CK
T1204 Malicious Link T1059 Command and Scripting Interpreter T1105 Ingress Tool Transfer

The critical ClamAV detection and high ML classifier score indicate malicious intent. The PDF contains an embedded script payload, suggesting it's designed to exploit a vulnerability and download a secondary stage. The embedded file artifact further supports this, likely containing the dropped 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
16e0ef8e676ced38f258fee75b4b2dc1ce9201f768d97ecbe87291ede36e4ae5
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).