Malicious PDF — malware analysis report

Static analysis result for SHA-256 c1b9dd5336d88410…

MALICIOUS

PDF

12.2 KB
MD5: 53c9fcbcaabbc5238b501be977cc3502 SHA-1: 69144be9dadc3543b042bb0e0c934b86195e0832 SHA-256: c1b9dd5336d8841039dfc737a51eb138fac91308bbb57af4ec3eaf2c2f02673e
96 Risk Score

Malware Insights

MITRE ATT&CK
T1204.002 Malicious File T1566.002 Spearphishing Attachment

The PDF contains embedded script payloads and is detected by ClamAV as Pdf.Exploit.Dropped-78, indicating it is designed to exploit vulnerabilities. The presence of XFA forms and embedded files further supports its malicious nature. The embedded URLs are not directly indicative of malicious activity but are part of the PDF structure.

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
ce9b3ff2b3d95b63a1bcf1c0d4ca93506337d19bf5da736e30152953e2f29302
pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC6 11756 bytes