Malicious PDF — malware analysis report

Static analysis result for SHA-256 e812028480223ae2…

MALICIOUS

PDF

26.1 KB
MD5: 1e69a7828cb766f8d5e4f03d469d5118 SHA-1: d569423819feb63a568d9a51c1bf707b4624931a SHA-256: e812028480223ae25661324c6f7bb9f97b63a3f86726de2542f7a826715d0e35
126 Risk Score

Malware Insights

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

The PDF exhibits multiple indicators of maliciousness, including embedded script payloads and a high ML classifier score. ClamAV detection as 'Pdf.Exploit.Dropped-78' strongly suggests it's a dropper for further malicious content. The presence of XFA forms and embedded files further supports its role as a delivery mechanism for exploits.

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
1a75c3057732e3cfd8a1801599ef253098cead740d0694cfeff1943a4f960b1b
pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC8 25975 bytes