Malicious PDF — malware analysis report

Static analysis result for SHA-256 3f62f06363e0b621…

MALICIOUS

PDF

16.6 KB
MD5: 8caa685b40602c315978234b18508e8a SHA-1: 157c196ffa051c7123e34e6e817470153fbd27da SHA-256: 3f62f06363e0b62134db5b2136ec5223a965dcad7cbe0da35c8cb25e62933fce
118 Risk Score

Malware Insights

MITRE ATT&CK
T1204.002 Malicious File T1059.007 JavaScript

The PDF file contains XFA forms and embedded scripts, indicated by multiple high-severity heuristic firings (PDF_UNESCAPE, PDF_XFA_SCRIPT). These elements are often used to deliver exploits. An embedded file artifact was also extracted. The specific script content is not detailed enough to determine its exact function, but the presence of XFA and embedded scripts strongly suggests an exploit attempt.

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
642ab73df938d75c3e6e2d6d0d283bb7d12937db71e2f3b0af7a37d23d2fdcef		 pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC6 16254 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact contains 1 eval/decoder/string-building token(s). Carved artifact contains 1 long base64-like blob(s).

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