Malicious PDF — malware analysis report

Static analysis result for SHA-256 ff93e7ef17508621…

MALICIOUS

PDF

18.8 KB
MD5: 8b4c79e004091e8766b43101c2ae0229 SHA-1: ffe3e7f1bfc3871bd537e4d684fdf4993016070b SHA-256: ff93e7ef17508621cab53addbf1b9037c672ce284b7c149da8f0dcf2cb1c9054
98 Risk Score

Malware Insights

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

The PDF file was detected by ClamAV as 'Pdf.Exploit.Dropped-78', indicating it contains an exploit. The presence of an embedded script payload and an embedded file further supports its malicious nature. The file likely attempts to exploit a vulnerability to download and execute a second-stage payload.

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
c6e846dbe6a9d474660c85ef05d11242acfc09ce7ba3b1a0eb9b405ac6057ce7
pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC8 18527 bytes