Malicious PDF — malware analysis report

Static analysis result for SHA-256 f6bc96bf1f61db53…

MALICIOUS

PDF

13.3 KB
MD5: 996b3fdd027b11d0e83d65a635e2edca SHA-1: 6f404c84ec576f785c21bf285fcdb1fbb7799017 SHA-256: f6bc96bf1f61db532ec34c7f1651a8282306a787e241dce1e78dfdb8b58054bf
66 Risk Score

Malware Insights

MITRE ATT&CK
T1204.002 Malicious File: User Execution: Malicious File T1566.002 Phishing: Spearphishing Attachment

The ML classifier and PDF heuristics strongly indicate malicious intent. The presence of an embedded script payload and an embedded file suggests the PDF is a dropper or exploit container. The document body contains obfuscated JavaScript, likely intended to execute a malicious payload. The specific URLs extracted are related to XFA forms, which have been historically exploited in PDF vulnerabilities.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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/xci/
    • 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
2cfa47d2ce7eeabecbd21b897c7b2fd8c635df8eb7974b72ea4bbc2974aca03f
pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xD5 12815 bytes