Malicious PDF — malware analysis report

Static analysis result for SHA-256 5394cb07c91ae811…

MALICIOUS

PDF

18.8 KB
MD5: 8453ae732dc9fac623bc6e3878696924 SHA-1: 8533659bf123657becbba493e6ca7e8371fde2da SHA-256: 5394cb07c91ae8116b32dc9bcccfcde380d2d0223260bae8537b62b7d6b12450
98 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV with the signature Pdf.Exploit.Dropped-78. It contains an embedded script payload and an embedded file, indicating it is designed to drop and execute further malicious content. The presence of XFA form elements and embedded files suggests a delivery mechanism for exploits or malware.

Heuristics 6

  • 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
  • PDF differential parser failed info PDF_DIFFERENTIAL_PARSE_FAILED
    The cross-check parser (pdfminer.six) failed on this file: PDF differential parser failed: PSEOF. Static heuristics still ran and any of their findings above are valid; only the differential cross-check signal is missing.
  • 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
d0f75689cfd8f84af853a77742e06f3c2b5107ac2c8aa329dee2c12347621b43		 pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC8 18461 bytes

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