Malicious PDF — malware analysis report

Static analysis result for SHA-256 afadfeb859481aed…

MALICIOUS

PDF

11.6 KB
MD5: 43aa0a06155623a3a26021b23cd91ecd SHA-1: 4a1c472e8dfab152fb23f7ee685b2e4445c4783a SHA-256: afadfeb859481aed06f75795146110d86b4e37732946f8844980f46bdc90f639
96 Risk Score

Malware Insights

MITRE ATT&CK
T1204 Malicious Link T1204.002 Malicious Link: Malicious File

The file is identified as a malicious PDF by ClamAV with the signature Pdf.Exploit.Dropped-78. Static analysis revealed an embedded script payload within a PDF stream, indicating the document is designed to exploit a vulnerability. The embedded file and script suggest a dropper functionality, likely intended to download and execute a second-stage payload. The presence of XFA forms and embedded files are common characteristics of such exploits.

Heuristics 5

  • ClamAV: Pdf.Exploit.Dropped-78 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Exploit.Dropped-78
  • 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
  • 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
7292f0f20bc05952e2989b9fc28ed1fdc68b313d4132c0d269c658fe9ff0346f
pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC8 11164 bytes