Malicious PDF — malware analysis report

Static analysis result for SHA-256 8f2517b7da3af85e…

MALICIOUS

PDF

19.2 KB
MD5: 870145951ff080ced0e73af179b07357 SHA-1: 7e9baae1073847a25f4918e8e017945856516498 SHA-256: 8f2517b7da3af85ede1b8965cdeaa4fe19a398611ebec18aff83d1b81bc3a02e
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 designed to exploit a vulnerability. The presence of an embedded script payload and an embedded file further supports this, suggesting it's a dropper mechanism. While the document body is heavily obfuscated and unreadable, the overall structure and heuristic firings point to a malicious exploit delivery.

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
6a66ae46f1aa38ef6b679116714f642685e14580adc49c7e93c049f9dfeb2cfe
pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC8 18926 bytes