Malicious PDF — malware analysis report

Static analysis result for SHA-256 1003ad7d6dd31b2d…

MALICIOUS

PDF

3.0 KB
MD5: 929356f49c6129d20c675ec750d387be SHA-1: f59f7db5d11ce8acb93de846c4b2c319eda8c92e SHA-256: 1003ad7d6dd31b2d89100851804db5cae591f51198829c07a1c2beae97562a7f
108 Risk Score

Malware Insights

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

The file is a PDF identified as malicious by ML classifiers and ClamAV due to obfuscated objects and embedded content. The presence of an embedded file suggests it's designed to deliver a secondary payload. The XFA form structure is also noted, which can be a vector for exploits.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

Heuristics 4

  • 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
  • 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
767dc3ea94f8b1cae8b8c663da06285f1c5cb95548d795aeb8417eb89951455d		 pdf-embedded-file PDF EmbeddedFile object 1 at offset 0x88 13584 bytes

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