Malicious PDF — malware analysis report

Static analysis result for SHA-256 55910420b4ba37ca…

MALICIOUS

PDF

21.4 KB
MD5: 7fc27308e022fd037e10bd9eb2e8eb40 SHA-1: 011776e7cc379f73002e97a021e18c8f400e2cb4 SHA-256: 55910420b4ba37ca5aa00c1589d205167703436a2ff65aaed679a1eb2981ce1b
118 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell T1204.002 Malicious File

The PDF file contains embedded JavaScript, indicated by the PDF_EVAL and PDF_XFA_SCRIPT heuristics. This script is likely designed to download and execute a secondary payload, as suggested by the PDF_EMBEDDED_SCRIPT_PAYLOAD firing and the presence of an embedded binary file. The XFA form structure further supports the exploitation of PDF vulnerabilities. The exact behavior of the script is not fully discernible due to obfuscation, but its presence and the embedded file strongly suggest a malicious intent.

Heuristics 7

  • 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.
  • eval() call high PDF_EVAL
    eval() found — commonly used for obfuscated exploit execution
  • 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
a579fe7466de092c1dd6716b2d2f8a97ad127cc23b431c6494a4ec2378a3bfad
pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC6 21192 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact contains 1 eval/decoder/string-building token(s).