Malicious PDF — malware analysis report

Static analysis result for SHA-256 aced7b8fa1484fb5…

MALICIOUS

PDF

11.8 KB
MD5: 78ef694789cfe42ded117409468ae87e SHA-1: 44685f03ae7b3b8356b5702b9649bcf27c96f940 SHA-256: aced7b8fa1484fb5e9fe0a83201e8c781121814195e8def851f83aa6795848df
96 Risk Score

Malware Insights

MITRE ATT&CK
T1204.002 Malicious File T1566.002 Spearphishing Attachment T1059.001 PowerShell

The critical ClamAV detection of 'Pdf.Exploit.Dropped-78' strongly indicates malicious intent. The presence of an embedded script payload within the PDF stream, along with an embedded file artifact, suggests the document is a vehicle for delivering a secondary exploit or malware. The XFA form and embedded file heuristics further support this, pointing towards a crafted PDF designed for exploitation.

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
06bbcfe86da68a279544a7cdef577d9bbde53f605b4b178c8fa2a3e474e02648
pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC8 11357 bytes