Malicious PDF — malware analysis report

Static analysis result for SHA-256 245cd2c838f93084…

MALICIOUS

PDF

11.9 KB
MD5: e695152cf9be48968f1049a73f630ebb SHA-1: 133674795500ff3640a14d4460fc0a053254d011 SHA-256: 245cd2c838f9308484ba82fb1bb2f6de1892dc313c3a04f87ae883e82a5954e6
128 Risk Score

Malware Insights

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

The ML classifier and ClamAV detection strongly indicate this PDF is malicious, specifically identified as 'Pdf.Exploit.Dropped-78'. The presence of an embedded script payload and an embedded file further supports its role as a dropper for malicious content. While the document body is not human-readable, the technical indicators point to an exploit delivery mechanism.

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
f337c1b188466513e6be3adc81708176abd6a975df12af343e1fd95b6d0d5067
pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC8 11428 bytes