Malicious PDF — malware analysis report

Static analysis result for SHA-256 df3cdbd9dfe635a0…

MALICIOUS

PDF

11.8 KB
MD5: 244b1f918a4e4d30c5cd3eda6ed14116 SHA-1: 6b061b02e162610db420fffa9146d9b184561140 SHA-256: df3cdbd9dfe635a07264cf91f415ea33a303ce2bb3aec08516f263601ba48a65
128 Risk Score

Malware Insights

MITRE ATT&CK
T1204 Malicious Link T1204.002 Malicious Link: Malicious File

The file is identified as a malicious PDF by multiple heuristics, including a critical ClamAV detection for 'Pdf.Exploit.Dropped-78' and a high ML classifier score. The PDF contains an embedded script payload and an embedded file, indicating it is designed to deliver a secondary malicious component. The presence of XFA forms and embedded objects are common characteristics of exploit-laden PDFs.

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 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
fb7f317c59f728fc75e88affbc94e626691116d3de4d1b8766351e3022748088
pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC8 11363 bytes