Malicious PDF — malware analysis report

Static analysis result for SHA-256 2a8864cb467dd8c7…

MALICIOUS

PDF

11.9 KB
MD5: 5c40fd9145e84884fe0b8183dd7f7997 SHA-1: b89cfde1b682bba03d1b84edad7d0b3d0c4ece61 SHA-256: 2a8864cb467dd8c75d343f8385fd7d503b0beaad6834b46c0f59624fff746bcd
96 Risk Score

Malware Insights

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

The PDF document contains embedded script payloads, as indicated by the PDF_EMBEDDED_SCRIPT_PAYLOAD heuristic. ClamAV detection as Pdf.Exploit.Dropped-78 further confirms its malicious nature. The embedded file 'embedded_file_obj0008.bin' is likely the delivered payload. The XFA form and embedded file heuristics suggest a technique to bypass standard PDF security measures.

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
ad9bcc4155b17a0507512a07ea91ba2cf859c5396ca35b32605bfcd81ecb7083
pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC6 11457 bytes