Malicious PDF — malware analysis report

Static analysis result for SHA-256 9d0e191d5a85f11c…

MALICIOUS

PDF

27.9 KB Created: 2013-01-29 13:45:06 Authoring application: bDdLHxK31 (via Fgh7EqgVcLT4AhMJ) First seen: 2026-05-09
MD5: e15e4c0c25eeb06bc4b2f855b0067105 SHA-1: 3b093239ba6b587653d93a6778d0867c1534379e SHA-256: 9d0e191d5a85f11cd774aeaf956866159076fd6af4c7a9760bbd9bda42e5dab4
72 Risk Score

Malware Insights

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

The PDF was flagged by an ML classifier as malicious with high confidence. It contains an embedded file, which is a common technique for delivering malware. The embedded artifact 'embedded_file_obj0016.bin' is the primary IOC. The XFA form and duplicate object body heuristics are less significant but contribute to the overall suspicious nature of the document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9512

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
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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/xci/1.0/In PDF document text
    • http://www.xfa.org/schema/xfa-template/2.2/In PDF document text
    • http://fsf.org/&gtIn PDF document text
    • http://www.xfa.org/schema/xfa-data/1.0/In PDF document text
    • http://ns.adobe.com/xfdf/In PDF document text
    • http://www.xfa.org/schema/xfa-form/2.8/In PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
embedded_file_obj0016.bin pdf-embedded-file PDF EmbeddedFile object 16 at offset 0x174F 28815 bytes
SHA-256: be0e68b5274d5f105c6822d4dc506da5b80462a8e5e34591137d3e56a1ae9ae4
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact contains 1 long base64-like blob(s).

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