Malicious PDF — malware analysis report

Static analysis result for SHA-256 0f3321eb23a9f801…

MALICIOUS

PDF

14.0 KB First seen: 2026-05-10
MD5: 8e4e7c9de19a82dac0596515fa1fca0e SHA-1: 91684819eb8483b4077181884db23d33bca37107 SHA-256: 0f3321eb23a9f8010e725c69956cc1819a83e95ce42b68017bd603df096be8c7
150 Risk Score

Malware Insights

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

This PDF file was identified as malicious by an ML classifier and triggered critical heuristics related to exploit detection. ClamAV detected Win.Exploit.CVE_2010_0188-7, indicating exploitation of a known vulnerability. Static triage found shellcode and command strings within an extracted artifact, suggesting the PDF is designed to execute arbitrary code upon opening, likely delivered as a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • Suspicious extracted artifact high 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 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://ns.adobe.com/xdp/ In PDF document text
    • http://www.xfa.org/schema/xci/1.0/In PDF document text
    • http://www.xfa.org/schema/xfa-template/2.4/In PDF document text
    • http://www.xfa.org/schema/xfa-data/1.0/In PDF document text
    • http://ns.adobe.com/xtd/In PDF document text
    • http://www.xfa.org/schema/xfa-form/2.8/In PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
embedded_file_obj0001.bin pdf-embedded-file PDF EmbeddedFile object 1 at offset 0x3E 13434 bytes
SHA-256: 387ddf79eaba5c633aea4a4945072cc40c005fe43fb502869e2576b49e141d13
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact contains 1 long base64-like blob(s).
xfa_image_rawvalue_000.tif pdf-xfa-image-tiff XFA image/rawValue TIFF payload near offset 0x576 8642 bytes
SHA-256: 2d5169e15cbac1efd6b28fd3cea97142b5d0fe8a040aa223a454fec531911efe
Detection
ClamAV: Win.Exploit.CVE_2010_0188-7
Obfuscation or payload: likely
Static shellcode analysis decoded payload bytes; decoded SHA-256: edfe33947515a7d8de4c6d64a7d76c9638b70def08e5ee90b72edd0012f421b9 Static shellcode analysis recovered command string(s): cmd /c C:\Acrobat.exe
xfa_image_rawvalue_000_shellcode_00.bin pdf-xfa-tiff-shellcode x86-low-nibble-pair decoded from XFA TIFF payload near offset 0xCA8 3400 bytes
SHA-256: edfe33947515a7d8de4c6d64a7d76c9638b70def08e5ee90b72edd0012f421b9

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