Malicious PDF — malware analysis report

Static analysis result for SHA-256 e82e3fd5ca1e3e71…

MALICIOUS

PDF

67.1 KB
MD5: 1f3ce6c2ae2790e61e02c43c008a9688 SHA-1: ba1fe0eb4af928edb7ef6336d5f6d94581edc69f SHA-256: e82e3fd5ca1e3e717ddcb16df6141ed622c8d37a472db193c0be3f9df2fbaf93
208 Risk Score

Malware Insights

MITRE ATT&CK
T1204.002 Malicious File T1566.001 Spearphishing Attachment T1027 Obfuscated Files or Information

The PDF file contains an embedded script payload and is flagged by multiple high-severity heuristics, including ML classification and ClamAV detection as Pdf.Malware.Agent-8008601-0. The presence of an embedded file and the use of PDF_UNESCAPE suggest the document is designed to exploit vulnerabilities and deliver a secondary payload. The embedded file 'embedded_file_obj0008.bin' is the primary indicator of malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 8

  • XFA form contains risky executable script high CVE related PDF_XFA_SCRIPT
    PDF embeds an XFA form whose script block contains exploit, submission/launch, or shell-execution primitives. Ordinary LiveCycle print/update scripts are left as generic XFA/JS signals unless stronger behavior is present.
  • ClamAV: Pdf.Malware.Agent-8008601-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Malware.Agent-8008601-0
  • unescape() call high PDF_UNESCAPE
    unescape() found — often used to decode shellcode in PDF JS exploits
  • 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
  • Suspicious extracted artifact info EXTRACTED_FILE_STATIC_TRIAGE
    One or more files extracted from inside this sample matched static suspicious-content checks such as script obfuscation, encoded payload blobs, packed data, or execution/download terms.
  • 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
49a6c80802735cc5868084d55e1d62ee60e7f6d12dda60ece1b0bb6913390a81		 pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC6 68012 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact contains 1 eval/decoder/string-building token(s).

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