Malicious PDF — malware analysis report

Static analysis result for SHA-256 723f88b74bb77528…

MALICIOUS

PDF

158.0 KB First seen: 2026-05-11
MD5: fe5ccb0a8af4c32ffdc0196d62cdb93f SHA-1: e2c5507cb182c2aaa564075e2463dd92ea99907d SHA-256: 723f88b74bb7752821bb7a1ed636e58f53362c6a97fc2eeaab70c710656b87e6
110 Risk Score

Malware Insights

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

The PDF file contains an XFA form and triggers the CVE-2010-0188 vulnerability, which is known to be exploitable for client execution. This indicates the document is designed to exploit a weakness in Adobe Reader to run malicious code. The embedded file and ML classifier further support a malicious classification.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9961

Heuristics 5

  • Adobe Reader XFA LibTIFF integer overflow — CVE-2010-0188 critical CVE exact CVE_2010_0188
    An XFA image field carries a TIFF whose IFD has a malformed tag that overflows the LibTIFF parser (CVE-2010-0188).
  • 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
  • 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

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 0x51 13450 bytes
SHA-256: 31e61cb1b2131b14774016d783ed3af19c13a53aef41cfd07f3bfc97c3854ec1
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 0x586 8658 bytes
SHA-256: 145662977f108a2b2b83f86562a9cc0b0771045b6a87f0f01218fc646db7398b

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