Malicious PDF — malware analysis report

Static analysis result for SHA-256 90e7add2cced45fb…

MALICIOUS

PDF

19.3 KB
MD5: a67135a6d2ec6bd0f0ebc6880becae17 SHA-1: c06d499ae44cc6a5d1301e892508d9585c88d9f9 SHA-256: 90e7add2cced45fbcfc1f8f76a706b9e7dc735267922c08ffde22a3c03722414
128 Risk Score

Malware Insights

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

The PDF was flagged by multiple heuristics, including ML classification and ClamAV detection, indicating malicious intent. The presence of an embedded script payload and an embedded file suggests the PDF is a dropper or exploit document. The embedded URLs, while not directly malicious, are associated with XFA forms, a known vector for PDF exploits. The ML classifier output of 0.999996 strongly supports the malicious verdict.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • ClamAV: Pdf.Exploit.Dropped-78 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Exploit.Dropped-78
  • Embedded script payload in PDF stream medium 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.
  • 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
  • PDF differential parser failed info PDF_DIFFERENTIAL_PARSE_FAILED
    The cross-check parser (pdfminer.six) failed on this file: PDF differential parser failed: PSEOF. Static heuristics still ran and any of their findings above are valid; only the differential cross-check signal is missing.
  • 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/xfa-template/2.5/
    • http://www.xfa.org/schema/xfa-data/1.0/

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
embedded_file_obj0008.bin
20e6f817c219b64a0672aaf90080810134ab1273928dfe0fd58ea5ba6a90cb88		 pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC8 19009 bytes

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