Malicious PDF — malware analysis report

Static analysis result for SHA-256 660bf14cfbff1fd0…

MALICIOUS

PDF

10.5 KB
MD5: 9e2c0af35fabc74fae315da8879723bd SHA-1: b52f89d491afe751632836f47e248a5445077dce SHA-256: 660bf14cfbff1fd01adcd0b39dc6f8e4fce44e0f6d72847f533ab7cbc26223fc
110 Risk Score

Malware Insights

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

The PDF file contains an embedded malicious file, as indicated by multiple heuristics including ClamAV detection and an ML classifier flagging it as malicious. The presence of an embedded file suggests an attempt to deliver a secondary payload, likely through a spearphishing attachment. The specific nature of the embedded file and its execution mechanism are not fully detailed, leading to a slightly reduced confidence.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 5

  • ClamAV: Heuristics.PDF.ObfuscatedNameObject critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Heuristics.PDF.ObfuscatedNameObject
  • 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.
  • 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/
    • http://www.xfa.org/schema/xci/1.0/
    • http://www.xfa.org/schema/xfa-template/2.4/
    • http://www.xfa.org/schema/xfa-data/1.0/
    • http://ns.adobe.com/xtd/
    • http://www.xfa.org/schema/xfa-form/2.8/

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
embedded_file_obj0001.bin
77cb2011f6056c99bb1c32b6ceda9d53d5521f0cf345b10a1e74663174d14cb6		 pdf-embedded-file PDF EmbeddedFile object 1 at offset 0x8A 13408 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact contains 1 long base64-like blob(s).

Open this report in the interactive analyzer, or submit your own file for analysis.