Malicious PDF — malware analysis report

Static analysis result for SHA-256 0c4305ce871f5648…

MALICIOUS

PDF

2.3 KB First seen: 2026-05-08
MD5: 781ccb65ec86ee25c37904174102243b SHA-1: 26e228790c41d0ce265a0cf8e01834c4fb59366d SHA-256: 0c4305ce871f5648aaa976af57f316299d15764f2203e945c60da103638d2b10
190 Risk Score

Malware Insights

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

The sample is a PDF file that exploits the CVE-2010-0188 vulnerability in Adobe Reader's handling of XFA forms and TIFF images. This exploit allows for the execution of arbitrary code, likely leading to the download and execution of a secondary payload. The ML classifier strongly indicates maliciousness, and ClamAV confirms the exploit signature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • Adobe Reader LibTIFF XFA image exploit — CVE-2010-0188 critical CVE likely CVE_2010_0188
    PDF contains XFA image data with an inline crafted TIFF payload and shellcode/delivery markers. This is the data-bound variant of the CVE-2010-0188 Adobe Reader LibTIFF/XFA exploit shape.
  • Suspicious extracted artifact medium 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
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
xfa_image_rawvalue_000.tif pdf-xfa-image-tiff XFA image/rawValue TIFF payload near offset 0x656 8642 bytes
SHA-256: 196556f09fb70a53a9888971df2c387ef6c1895d1aaccad908f6260227acba08
Detection
ClamAV: Win.Exploit.CVE_2010_0188-7
Obfuscation or payload: likely
Static shellcode analysis found candidate code region(s). Indicators: NOP sled, SC_PUSH_STRING
stream_000_off00000131.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x131 13410 bytes
SHA-256: 12e955785c01c817cb421746d13949c6fec591aa2228c04086391d1e53f65f47
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact contains 1 long base64-like blob(s).

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