Malicious PDF — malware analysis report

Static analysis result for SHA-256 898742d46de65b52…

MALICIOUS

PDF

11.8 KB
MD5: 643a6b0e0e1cd5afe44fe5e63224fb54 SHA-1: 286d627f7d7addd8304090dba70d8972d4122cbb SHA-256: 898742d46de65b52dd2c6036724fc312e24643886da0f362679759939f4d5f22
96 Risk Score

Malware Insights

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

The file is identified as malicious by ClamAV with the signature Pdf.Exploit.Dropped-78, indicating it is a known PDF exploit. The presence of an embedded script payload and an embedded file further supports this. The embedded URLs are related to XFA forms, which are sometimes used in PDF exploits. The exact nature of the embedded script payload could not be determined due to its obfuscated nature.

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
a0538fa44cf832048b0050a6a46cc7d508e18819e1e3c7819d560fa02142388e
pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC8 11283 bytes