Malicious PDF — malware analysis report

Static analysis result for SHA-256 6ace47a0b0ef89f7…

MALICIOUS

PDF

26.1 KB
MD5: 1e2d5e2edbdd99a2a563ea8178eac1ac SHA-1: 2a6840bd4c53fe40587334a4f481a2b75107452e SHA-256: 6ace47a0b0ef89f7a7020a1fc83772e6fc46e4794dc78ff2bfe40d9a61a3340d
116 Risk Score

Malware Insights

MITRE ATT&CK
T1203 Exploitation for Client Execution T1566.001 Spearphishing Attachment

The sample is a PDF file identified as malicious by ClamAV and an ML classifier, indicating it contains an exploit. The presence of an embedded script payload and an embedded file suggests the PDF is designed to deliver a secondary malicious payload. The exploit likely targets a vulnerability in PDF viewers to achieve client execution.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • ClamAV: Pdf.Exploit.Dropped-78 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Exploit.Dropped-78
  • 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 script payload in PDF stream low 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 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
a9e2f4a1b873dfa4bb71cf7612c626cf37bd26d853bf2c65f2db9db50396eb4c
pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC8 25971 bytes