Malicious PDF — malware analysis report

Static analysis result for SHA-256 9607a22239405f3e…

MALICIOUS

PDF

15.4 KB First seen: 2012-09-24
MD5: 82205150498d7109c59c922518f02e01 SHA-1: e4325da5494bbd68421413679407e6c9cac1430a SHA-256: 9607a22239405f3ec7e52c80acc599a19d22e1a41b53777d0bcc77b12f09844e
72 Risk Score

Malware Insights

MITRE ATT&CK
T1204.002 Malicious File

The PDF contains an embedded file, identified as 'embedded_file_obj0008.bin', which is a strong indicator of malicious intent. The presence of XFA forms and embedded script payloads further supports this, suggesting the document is designed to trick the user into executing the embedded artifact. No specific malware family could be confidently identified.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • Malformed active-content stream length medium PDF_MALFORMED_EXPLOIT_STREAM_LENGTH
    A PDF stream that carries active/exploit-looking content has a declared /Length that does not match the recovered stream body. Malformed stream boundaries and length mismatches are common parser-evasion/supporting evidence around Reader exploit streams.
  • 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
  • Embedded script payload in PDF stream info 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.
  • 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.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://ns.adobe.com/xdp/ In PDF document text
    • http://www.xfa.org/schema/xfa-template/2.5/In PDF document text
    • http://www.xfa.org/schema/xfa-data/1.0/In PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
embedded_file_obj0008.bin pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC6 15009 bytes
SHA-256: 66113e86ec7b0e554aee0b80e9465adce4e8deeb1f29aff6da4fc6a84e5f9e0a
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact contains 1 long base64-like blob(s).

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