Malicious PDF — malware analysis report

Static analysis result for SHA-256 707481eff2ed7f43…

MALICIOUS

PDF

141.1 KB First seen: 2026-05-10
MD5: 133c2b25d94868e26de145b96c52d312 SHA-1: ef56e707624a5418b61c4c617af97c0369c49786 SHA-256: 707481eff2ed7f4386a4eba560e14503b4361f9afd339dea1592390faf058694
110 Risk Score

Malware Insights

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

The PDF sample triggers a critical heuristic for CVE-2010-0188, an integer overflow vulnerability in Adobe Reader's XFA processing of TIFF images. This exploit is known to lead to arbitrary code execution. The presence of an embedded file and ML classification further support its malicious nature. The benign URLs are likely decoys or standard XFA schema references.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9967

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: bbad9f202cc0ff197190c5ca3b2cef8853373b46d733bad1f3e2f8d10267fe85
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: 3d62407e014346145d5f2792cf1d09cd064853fdb60c1b60f17ec14465f6efaf

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