Malicious PDF — malware analysis report

Static analysis result for SHA-256 652bfc69e0585ab3…

MALICIOUS

PDF

12.1 KB
MD5: a1d3656ee01f0ec0482363b81bd0a420 SHA-1: f48cc2913eaf135f87c57133b6a2c7e35c4c2792 SHA-256: 652bfc69e0585ab380f3202b541341a6da6146c7dc5f27978a6b0b2e9ffb3015
116 Risk Score

Malware Insights

MITRE ATT&CK
T1059.007 JavaScript T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The sample is a PDF file flagged as malicious by ClamAV and an ML classifier, indicating it contains an exploit. Heuristics indicate the presence of embedded files and scripts within PDF streams, suggesting an attempt to deliver a secondary payload. The benign URLs found are likely unrelated to the malicious functionality.

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
bc51e6df7bb34d65cb378fbed9c661b4351776d57993001a89f6d51a25c07db1
pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC8 11623 bytes