Malicious PDF — malware analysis report

Static analysis result for SHA-256 190c2d162c613110…

MALICIOUS

PDF

12.0 KB
MD5: 2424975833361c020249dda67b713b85 SHA-1: e3e7e3c34c246bd7c2eefb102ad471c0721819da SHA-256: 190c2d162c6131107bc758d1e0d5de9f2cf33652229c38e700ed3f46bc88dc95
130 Risk Score

Malware Insights

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

The file is identified as a malicious PDF by multiple heuristics, including ML classification and ClamAV detection, indicating it's likely an exploit or dropper. The presence of an embedded file and a suspicious URL suggests it attempts to download and execute a secondary payload. The XFA form and ASCIIHexDecode filter are common indicators in malicious PDFs.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • ClamAV: Pdf.Exploit.Dropped-90 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Exploit.Dropped-90
  • ASCIIHexDecode filter (with exploit indicators) medium PDF_FILTER_HEX
    Hex-encoding filter present alongside exploit delivery indicators — often used to hide payload or shellcode bytes
  • 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: PSSyntaxError. 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://176.9.29.22/96UxV6b1DSVCd67pYhzIcSloaeIPfSH7?pp=1?plugin=1
    • 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
b36a029dc12411c6388bcd9d0bdce55ff2c730106cc5a7cacfe25450fd91ee20		 pdf-embedded-file PDF EmbeddedFile object 1 at offset 0x5A 1877 bytes

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