Malicious PDF — malware analysis report

Static analysis result for SHA-256 6bb7fdce38e3a656…

MALICIOUS

PDF

157.4 KB
MD5: 6cd85dfd31562685c33fa9086fb80750 SHA-1: d4fd5ec3aef17d3568524e11e2e984188e095d60 SHA-256: 6bb7fdce38e3a656e261b45ffbafefd6b7b85add1e3c61adbd6654c4ded14363
112 Risk Score

Malware Insights

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

The sample is a PDF document that contains an embedded exploit targeting CVE-2010-0188 in Adobe Reader's handling of XFA forms and TIFF images. This exploit allows for arbitrary code execution, which is typically used to download and run additional malicious content. The ML classifier strongly indicates maliciousness, and the embedded file further supports this.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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.
  • 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.
  • 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/
    • http://www.xfa.org/schema/xci/1.0/
    • http://www.xfa.org/schema/xfa-template/2.4/
    • http://www.xfa.org/schema/xfa-data/1.0/
    • http://ns.adobe.com/xtd/
    • http://www.xfa.org/schema/xfa-form/2.8/

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
embedded_file_obj0001.bin
5ec0d473ee9d12f367df9819f8708481ac3ee1f7861e57012b064878752c2c0b		 pdf-embedded-file PDF EmbeddedFile object 1 at offset 0x51 13438 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact contains 1 long base64-like blob(s).

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