Malicious PDF — malware analysis report

Static analysis result for SHA-256 730c5f6fb09953d0…

MALICIOUS

PDF

423.4 KB
MD5: 90ff56bde08f713c1da4e8a86cb69a91 SHA-1: 376ce4953b18ae6618df061f33a5c7d9cbde6cf1 SHA-256: 730c5f6fb09953d007081cace1bff09ff45a4800e7ea3e94143ec019c6c2e4bb
170 Risk Score

Malware Insights

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

The critical heuristic firing for CVE-2010-0188 indicates that this PDF exploits a known vulnerability in Adobe Reader related to XFA forms and TIFF images. The ML classifier and ClamAV also flagged this file as malicious. The exploit likely serves to download and execute a secondary payload, aligning with the typical behavior of malicious documents delivered via spearphishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9948

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.
  • ClamAV: Heuristics.PDF.ObfuscatedNameObject critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Heuristics.PDF.ObfuscatedNameObject
  • 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.
  • 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
37c7ee258dccfb753b8aa927a2ee75cdcebc95d9625c16e71a628ce44938145e		 pdf-embedded-file PDF EmbeddedFile object 1 at offset 0x51 13711 bytes

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