Malicious PDF — malware analysis report

Static analysis result for SHA-256 7ab5fca35469f3c0…

MALICIOUS

PDF

11.8 KB
MD5: 3c8cc5d69afa16250dfd742a373ec28e SHA-1: 53457d60da970d7739f7b12c92c73012538a1695 SHA-256: 7ab5fca35469f3c01cfbb57efc249b72f18d3917360e0fe35a44c63c7d6b6fdc
96 Risk Score

Malware Insights

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

The PDF contains an embedded script payload, indicated by the 'PDF_EMBEDDED_SCRIPT_PAYLOAD' heuristic. This suggests the document is designed to execute malicious code upon opening. The ClamAV detection 'Pdf.Exploit.Dropped-78' further confirms its malicious nature. While specific script content is not detailed, the presence of an embedded script points towards an attack pattern involving the exploitation of PDF vulnerabilities to download and execute a secondary payload.

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
515bb03307b8d72619ea021446601f9c17ae63c9bf24ead755dbec7ba6e78caf
pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC6 11350 bytes