Malicious PDF — malware analysis report

Static analysis result for SHA-256 c09709e3eafc0b68…

MALICIOUS

PDF

27.3 KB
MD5: 4de7bfbc65333644ffc0cdc916edc7bd SHA-1: 19f5a57d79359127e330aecc408837f3899ddb5f SHA-256: c09709e3eafc0b685f7bf289b46def95e24bb0b5a622ed9832efced94f6a160c
96 Risk Score

Malware Insights

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

The PDF file was detected by ClamAV as Pdf.Exploit.Dropped-78, indicating it contains an exploit. Heuristics confirm the presence of an embedded script payload and an embedded file, which are common delivery mechanisms for malicious content. The embedded script is too obfuscated to determine its exact function, but its presence alongside the embedded file strongly suggests it is used to download and execute a second-stage 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
7554f722a2a2e814baf9421099daa5bbd5747c7f0411c57adaedea207324c249
pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC8 27150 bytes