Malicious PDF — malware analysis report

Static analysis result for SHA-256 e1bf7cdca017055d…

MALICIOUS

PDF

11.7 KB
MD5: 61f23887f9a1bb16aba40685737a63f7 SHA-1: bcbd4c423ae66959933ab75d2f688d8b233ab28b SHA-256: e1bf7cdca017055dd685f50003355654ee4dc093cd8d7eb658dcdb855dabdffc
96 Risk Score

Malware Insights

MITRE ATT&CK
T1204.002 Malicious File T1566.001 Spearphishing Attachment

The critical ClamAV detection 'Pdf.Exploit.Dropped-78' and the 'PDF_EMBEDDED_SCRIPT_PAYLOAD' heuristic indicate that this PDF contains and likely executes an embedded malicious script. The presence of an embedded file further supports the delivery of a secondary payload. The exact nature of the script's execution is unclear due to obfuscation, but the overall pattern suggests a malicious PDF designed to drop and execute further malware.

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
5c2dab2927c154c6510dc646f0c511c8c3aa6b3ac69ac577756e659a9d406def
pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC8 11253 bytes