Malicious PDF — malware analysis report

Static analysis result for SHA-256 c01bd7bf245f2707…

MALICIOUS

PDF

5.7 KB First seen: 2026-05-08
MD5: 82aa51541df0128d46a4f90aa1d5c3fd SHA-1: 74d3601f9c9dcbd5fafdfc32cb7f7823cecadaa1 SHA-256: c01bd7bf245f27078fef0395699d7e6dac8db21f4e5fa239c10e5d957f8ccf1b
72 Risk Score

Malware Insights

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

The PDF file contains embedded script content and an embedded file, indicating an attempt to deliver a malicious payload. The heuristics suggest the presence of an embedded script payload and an embedded file, which is a common technique for exploiting PDF vulnerabilities. The embedded script is heavily obfuscated, making it difficult to determine its exact function, but it likely attempts to download and execute a second-stage payload. The document body is also heavily obfuscated and appears to be malformed.

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 0x78 5086 bytes
SHA-256: d7d488aa8c7591b32a2ad77a46b19de0b7fb76b7bd361c4453ed45bef1a60212
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact contains 4 long base64-like blob(s).

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