Malicious PDF — malware analysis report

Static analysis result for SHA-256 2bb0c621c6ac24fc…

MALICIOUS

PDF

12.0 KB
MD5: d054f5a2446a08fe220033c092dd14af SHA-1: 98c846bd6019736b894817e86866791f3466cc95 SHA-256: 2bb0c621c6ac24fc92679573dbde8a202324d91684d1524f61bd4638547f8d83
126 Risk Score

Malware Insights

MITRE ATT&CK
T1204 Malicious Link T1204.002 Malicious Link: Malicious File T1059 Command and Scripting Interpreter T1059.001 Command and Scripting Interpreter: PowerShell T1566 Phishing T1566.002 Phishing: Spearphishing Attachment

The critical ClamAV detection and high ML classifier score indicate maliciousness. The PDF contains embedded script payloads and an embedded file, strongly suggesting it's a dropper or exploit document. The presence of XFA forms and embedded scripts points towards exploitation of PDF vulnerabilities to download and execute a secondary payload.

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
bfc1f8cf8d8cd568e5fad383c43c2bfbad991e289a62c3999db464c35c655db4
pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC6 11481 bytes