PDF malware analysis — malicious · c4839b7e4585e57f

MALICIOUS

PDF

18.6 KB

MD5: d902a665ceea2f51ce52f4de6be47c80 SHA-1: 2f11cdd8ffb1e2ebc469fe4eb97e6b4bcff10a20 SHA-256: c4839b7e4585e57f907d7385322b4707e5a5cbbfad177df0fa8856647b196cc6

68 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The PDF file was flagged by a machine learning classifier as malicious and contains an embedded script payload. This script is likely responsible for downloading and executing a secondary malicious file, as indicated by the 'PDF_EMBEDDED_SCRIPT_PAYLOAD' heuristic and the presence of an embedded binary artifact. The ML classifier's high confidence score further supports this assessment.

Machine Learning

Nyx PDF Classifier malicious score 0.9998

Heuristics 4

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.

Extracted artifacts 1

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`embedded_file_obj0096.bin` `e1946986444761fd16f60ba9298e29a68c1ed3f87b1f2fd77798afa38a33be21`	pdf-embedded-file	PDF EmbeddedFile object 96 at offset 0x5C	24936 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 long base64-like blob(s).

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