Malicious PDF — malware analysis report

Static analysis result for SHA-256 8fe4aba6ac514626…

MALICIOUS

PDF

10.8 KB Created: 2009-08-21 18:10:57 +02:00 Authoring application: Acrobat Editor 9.0 (via Adobe Acrobat 9.0.0) First seen: 2026-05-11
MD5: d25bfd8d545039056923b31af670a4f4 SHA-1: 707ef617f9d9c716164fd5146f102949195acd5e SHA-256: 8fe4aba6ac514626427956d3f473904ed5ed796548acc8735e34a2eff9cc285b
102 Risk Score

Malware Insights

MITRE ATT&CK
T1203 Exploitation for Client Execution T1566.001 Spearphishing Attachment

The PDF contains embedded Flash content (xp.swf) and triggers high severity heuristics for RichMedia and ML classification, indicating malicious intent. The ML classifier output of 0.933357 strongly suggests maliciousness. The PDF is likely designed to exploit vulnerabilities via the embedded Flash object to execute arbitrary code.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9334

Heuristics 5

  • RichMedia (Flash) high PDF_RICHMEDIA
    PDF contains /RichMedia (Adobe Flash) which is a historic exploit vector
  • Suspicious extracted artifact medium 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 file low PDF_EMBEDDED
    PDF embeds a file attachment — could carry an executable or another weaponised document as a nested payload
  • PDF paints image(s) but contains no text operators info PDF_IMAGE_ONLY_LURE
    PDF has 1 image XObject(s) and the content stream contains no text-emitting operators (BT/ET, Tj, TJ, ', ") in either raw bytes or decompressed streams — this is the screenshot-as-PDF pattern used to bypass text-based scanners and to deliver instructions purely through rendered pixels. It is informational unless paired with invisible links or risky URI context.
  • 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://adobe.com/AS3/2006/builtin In PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
xp.swf pdf-embedded-file PDF EmbeddedFile object 1 at offset 0xCD 1120 bytes
SHA-256: 13288badb7e21dd4c4262e6cf178cf0129cbd09ebb4f9a1a375187d172a007ef
Detection
ClamAV: No threats found
Obfuscation or payload: likely
actual_type=SWF; declared_or_context_type=PDF; filename=xp.swf; kind=pdf-embedded-file

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