Malicious PDF — malware analysis report

Static analysis result for SHA-256 d4a9e1f4d9a5f42d…

MALICIOUS

PDF

68.4 KB
MD5: 6da9315f374cd74b734c0ad29ba7d0e1 SHA-1: 0a2bf5738356fc5eaf23dfe60ccf2a49d62c921e SHA-256: d4a9e1f4d9a5f42d256a2a4994bba814223c8504b7aa5243b224ab110a52a461
118 Risk Score

Malware Insights

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

The PDF file contains XFA forms and embedded scripts, indicated by the PDF_XFA_SCRIPT and PDF_EMBEDDED_SCRIPT_PAYLOAD heuristics. The presence of an unescape() call (PDF_UNESCAPE) suggests obfuscated JavaScript is used to execute malicious code. This script likely attempts to download and execute a secondary payload from an external source, as suggested by the embedded file artifact. The specific URLs extracted are related to XFA schemas and Adobe, but their reputation is unknown or benign, so they are not considered primary IOCs for malicious activity.

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
fa1b42545a1a1bf7c9e1893b846aebe998455c8998a98e77180cf852615e312a		 pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC6 69341 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact contains 1 eval/decoder/string-building token(s).

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