Malicious PDF — malware analysis report

Static analysis result for SHA-256 67af868fefb53d7b…

MALICIOUS

PDF

9.5 KB First seen: 2026-05-10
MD5: 318280f457fb3f847e064672d09842e7 SHA-1: d47dfd23d5324d7fed61008804142eee019f596e SHA-256: 67af868fefb53d7b5402704fa21540f3f8fa9610addc317c2075fd2620a207f1
130 Risk Score

Malware Insights

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

The PDF file contains malformed active content and triggers a critical heuristic for an exploit targeting CVE-2010-0188. This indicates the document is designed to exploit a vulnerability in PDF readers for client execution. The embedded artifact 'embedded_file_obj0001.bin' is likely the second-stage payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9854

Heuristics 5

  • Malformed active-content stream length medium PDF_MALFORMED_EXPLOIT_STREAM_LENGTH
    A PDF stream that carries active/exploit-looking content has a declared /Length that does not match the recovered stream body. Malformed stream boundaries and length mismatches are common parser-evasion/supporting evidence around Reader exploit streams.
  • 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 (matched inside decoded stream)
  • 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/ 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 4

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

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
embedded_file_obj0001.bin pdf-embedded-file PDF EmbeddedFile object 1 at offset 0x56 13408 bytes
SHA-256: 0b1b624cc83990906bc2e187aed15d58d7c166b493a9a690624d2de7ff1f6d4b
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 0x57B 8642 bytes
SHA-256: 2dab9e8e04a6e97e467daf69ec05a6efd546f9df1c024675357f5a57249dce66
Detection
ClamAV: Win.Exploit.CVE_2010_0188-7
Obfuscation or payload: unlikely

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