Malicious PDF — malware analysis report

Static analysis result for SHA-256 3636af8de44fb324…

MALICIOUS

PDF

19.0 KB
MD5: 57b8c63f39156b1541ddd25e63b34983 SHA-1: c9a75fcc097ca221269e7c06cbf02c501ed8c9bf SHA-256: 3636af8de44fb32490e824b4a7db18d4d38f0e571a844f632236c5a5a76f8983
98 Risk Score

Malware Insights

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

The file is identified as a malicious PDF by ClamAV, indicating it exploits vulnerabilities. The presence of embedded script payloads and embedded files further supports this. While the document body and script content are heavily obfuscated and difficult to parse, the overall structure and heuristic firings point to a malicious PDF dropper. The embedded URLs are likely related to the exploit or payload delivery mechanism.

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
3a90356bd941c23b8c6b5d6eb604470e8132f5705a1d2cc0f899e2cff707a64a		 pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC8 18688 bytes

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