Malicious PDF — malware analysis report

Static analysis result for SHA-256 8092e709a643d60a…

MALICIOUS

PDF

27.8 KB
MD5: da6b0a56fe99f42f8366ae7ca48f2a33 SHA-1: 1cdf86762d5f49eb1a954908d4ff8f4013932e1c SHA-256: 8092e709a643d60abdefc759def34ff48dbfd4fc7db4fa78ba9aeef9d68841a2
148 Risk Score

Malware Insights

MITRE ATT&CK
T1204.002 Malicious File T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF exhibits multiple high-severity heuristic firings related to embedded scripts and XFA forms, indicating a malicious intent. The ML classifier strongly supports this assessment. While no document body text or explicit script content was provided for analysis, the presence of embedded files and the nature of the PDF heuristics suggest the file is likely a dropper or exploit delivery mechanism. The embedded URLs, though not directly malicious, are part of the PDF's structure.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.
  • 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/xci/1.0/
    • http://www.xfa.org/schema/xfa-template/2.5/

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
embedded_file_obj0002.bin
0a2224c4023b216235b61c3fc4dd17bbfac1ab23a545687f51b97604cf654712		 pdf-embedded-file PDF EmbeddedFile object 2 at offset 0xCA 46 bytes
embedded_file_obj0008.bin
24c130f03a4cf51d470b536e94c1e58af67665739e200e0ce198ad41086243c0		 pdf-embedded-file PDF EmbeddedFile object 8 at offset 0x153 228 bytes
embedded_file_obj0001.bin
92096375262c8a384e41ba79d113761d9da073e86f57f13ae54d54a89a2694bf		 pdf-embedded-file PDF EmbeddedFile object 1 at offset 0x529 26558 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact contains 1 eval/decoder/string-building token(s).

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