Malicious PDF — malware analysis report

Static analysis result for SHA-256 b3248abbc97aa832…

MALICIOUS

PDF

68.3 KB
MD5: 50fd012c3c5d09ed791a45abe69d0c6f SHA-1: b0be80d7d819d408fd917fcf01f8db48a83abc31 SHA-256: b3248abbc97aa8323e025868aa4fe10b3a830c553766225a8c47dccc40a03581
118 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell T1204.002 Malicious File

The PDF file contains embedded XFA forms with executable scripts, indicated by high-severity heuristics like PDF_XFA_SCRIPT and PDF_UNESCAPE. The presence of an embedded file object (embedded_file_obj0008.bin) and the unescape() call suggest the script is designed to deobfuscate and execute malicious code, likely a downloader for a second-stage payload. The confidence is reduced due to the lack of direct script content for analysis.

Heuristics 7

  • 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.
  • unescape() call high PDF_UNESCAPE
    unescape() found — often used to decode shellcode in PDF JS exploits
  • Embedded script payload in PDF stream medium PDF_EMBEDDED_SCRIPT_PAYLOAD
    PDF stream bytes contain an HTML/XFA <script> tag without accompanying Windows shell-execution primitives — common in accessible XFA forms but worth surfacing for analyst review.
  • 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/
    • http://www.xfa.org/schema/xfa-template/2.5/
    • http://www.xfa.org/schema/xfa-data/1.0/

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
embedded_file_obj0008.bin
80ae008592fe31c3c90f29d6538a6978acba25450ffcd9232c3b1c8376e57ace		 pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC6 69181 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact contains 1 eval/decoder/string-building token(s).

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