Malicious PDF — malware analysis report

Static analysis result for SHA-256 a606227b1aba224e…

MALICIOUS

PDF

11.8 KB
MD5: 4de2e6ab5de4e03ab800007a5afed27c SHA-1: f2fc572fab2d3a3e1c127fb5594cca2c7e0e87e1 SHA-256: a606227b1aba224e9e41dfe8382c2ecfd54f7e6a306c5f11fdbae102d4e96e19
96 Risk Score

Malware Insights

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

The PDF file contains embedded content and an embedded script payload, as indicated by the PDF_EMBEDDED and PDF_EMBEDDED_SCRIPT_PAYLOAD heuristics. ClamAV detection as Pdf.Exploit.Dropped-78 further confirms its malicious nature. The embedded script likely serves to download and execute a second-stage payload, although the exact mechanism is not fully detailed in the provided evidence. The embedded URLs are not directly indicative of malicious activity but are present within the document 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
39e115a19440db32c803e9b5c06a5915185bf44d6334962c15a258dfd8ecbc36
pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC6 11343 bytes