Malicious PDF — malware analysis report

Static analysis result for SHA-256 46e0d104d51823df…

MALICIOUS

PDF

6.8 KB Created: 2013-08-23 21:44:05
MD5: ca4daadf8edb58aa0190fb84771ff228 SHA-1: 2814c261a0c7c18197a68cbfed235499bbff8d08 SHA-256: 46e0d104d51823df772f7a10f1220023088513f863a570083751b143e6a5f628
68 Risk Score

Malware Insights

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

The PDF contains an embedded file (embedded_file_obj0004.bin) and an embedded script payload, as indicated by the PDF_EMBEDDED and PDF_EMBEDDED_SCRIPT_PAYLOAD heuristics. The ML classifier strongly flagged this PDF as malicious. The document body text appears to be garbled or truncated, providing no clear user-facing lure, but the presence of the embedded file and script strongly suggests an attempt to deliver a secondary payload.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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_obj0004.bin
d72374a1df227edf2ab8931e45eb679e88b32da6e476310c1dd053bc478afcc8
pdf-embedded-file PDF EmbeddedFile object 4 at offset 0xA8E 5923 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact contains 1 long base64-like blob(s).