Malicious PDF — malware analysis report

Static analysis result for SHA-256 0cc516e39d41e8de…

MALICIOUS

PDF

11.9 KB
MD5: b98f342f284f5ef5580f0d2225f9e160 SHA-1: 2027acdc0b87849995683a308608957d8edc9fda SHA-256: 0cc516e39d41e8de887c91c0a2f044353b7745e70af0735e958772df41d2db41
116 Risk Score

Malware Insights

MITRE ATT&CK
T1203 Exploitation for Client Execution T1566.001 Spearphishing Attachment

The file is identified as a malicious PDF by ML classification and ClamAV, with a critical detection of 'Pdf.Exploit.Dropped-78'. It contains embedded content and an XFA form, which are common vectors for PDF exploits. The embedded script payload suggests an attempt to execute malicious code, likely leading to the download and execution of a secondary payload.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • ClamAV: Pdf.Exploit.Dropped-78 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Exploit.Dropped-78
  • 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 script payload in PDF stream low 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 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
1034d18d152a6ad47c646a0c0dacd98fa0a23b1a0d6bd09eb5638cb0b3d59fec
pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC8 11423 bytes