Malicious PDF — malware analysis report

Static analysis result for SHA-256 2f403aa65ff5d10e…

MALICIOUS

PDF

8.7 KB
MD5: 66128da0fd693d95a0c9ee8572f72e7d SHA-1: 8ce20d7ab4ba327fbac568f175e83a647f9fbcf1 SHA-256: 2f403aa65ff5d10e9a3e4d7bca0957d159e91c35a8eb95469511037211ef3daa
124 Risk Score

Malware Insights

The PDF sample contains critical heuristic firings for XFA JavaScript heap-spray exploit code and risky executable scripts within XFA forms. This indicates the document is designed to exploit a vulnerability, likely leading to the download and execution of a second-stage payload. The presence of an embedded URL further supports this delivery mechanism.

Heuristics 6

  • XFA form contains risky executable script high CVE related PDF_XFA_SCRIPT
    PDF embeds an XFA form whose script block contains exploit, submission/launch, or shell-execution primitives. Ordinary LiveCycle print/update scripts are left as generic XFA/JS signals unless stronger behavior is present.
  • XFA JavaScript heap-spray exploit code critical PDF_XFA_HEAP_SPRAY
    PDF contains XFA script content with heap-spray or shellcode-like JavaScript markers such as large encoded word sequences, util.pack, large arrays, or spray variable names. This is a weaponised Adobe Reader exploit pattern, not a normal interactive form.
  • 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
  • AcroForm button with action trigger low PDF_ACROFORM_BUTTON
    PDF contains a /Btn form field together with a SubmitForm/URI/Launch/JS trigger — this is the building block of fake 'Download' or 'Open' button overlays used in PDF phishing lures
  • 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://www.xfa.org/schema/xfa-locale-set/2.1/

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
embedded_file_obj0041.bin
c06dcd026a7ea0536b63e07ce688691b585339a3ab7ff59065e546b56308c7bb		 pdf-embedded-file PDF EmbeddedFile object 41 at offset 0xE93 85 bytes
embedded_file_obj0042.bin
dda0835df994b8be920f715db36452f6cee7bb42bbc9c897f878a7b298ba8e91		 pdf-embedded-file PDF EmbeddedFile object 42 at offset 0xF45 1029 bytes
embedded_file_obj99999.bin
eb3d458189dcbcfee6e9dee57aea7ec57fb9a5b72af7a79c010554871456e345		 pdf-embedded-file PDF EmbeddedFile object 99999 at offset 0x1161 21031 bytes
embedded_file_obj0044.bin
3dd68f00f4fcb366a2a3a17c65cb2626eeddf5ea5713302d374310561d810169		 pdf-embedded-file PDF EmbeddedFile object 44 at offset 0x1D4E 144 bytes
embedded_file_obj0045.bin
10c03f88a5f0a0833dc5b2c8ac295b3a3c6f65e23889eb8cc1dc6fe29bf7f275		 pdf-embedded-file PDF EmbeddedFile object 45 at offset 0x1DFB 77 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.