Malicious PDF — malware analysis report

Static analysis result for SHA-256 b9b48e26fc96d8c0…

MALICIOUS

PDF

11.9 KB
MD5: 609080671d6a5fe99dd837eec227a64d SHA-1: da135bca1fad2720b5652597b6c6fccb11e45b16 SHA-256: b9b48e26fc96d8c04826843919b0d14557c161d28179e4713c407750fb06f2ea
96 Risk Score

Malware Insights

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

The critical ClamAV detection 'Pdf.Exploit.Dropped-78' strongly indicates this PDF is malicious and likely exploits a known vulnerability. The presence of an embedded script payload and an embedded file further supports this, suggesting it's designed to download and execute a secondary payload. The document body content is not human-readable and appears to be malformed or obfuscated data, offering no specific lure.

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
5611acc6db9fb2b08cbf16ad1ee0ea0a2c707ec221c2dec055e9b995de85503e
pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC8 11465 bytes