PDF malware analysis — malicious · 52e3ec6cc3c9ac11

MALICIOUS

PDF

5.0 KB Created: 2011-04-05 23:46:28 Authoring application: bgffub lodfab

MD5: 0637840048bc231e2332ca31e2e5c5f7 SHA-1: a59dfd423cfad32f6626a793f8fd10c99105fcf2 SHA-256: 52e3ec6cc3c9ac11c17e4c916df882cd3dab9f515813325855f0494641c8cf63

70 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The PDF file was flagged as malicious by an ML classifier and contains an embedded JavaScript payload. This script is likely responsible for downloading and executing a secondary malicious file, as indicated by the 'ML_NYX_PDF_MALICIOUS' and 'PDF_EMBEDDED_SCRIPT_PAYLOAD' heuristics. The presence of an embedded file further supports this conclusion.

Machine Learning

Nyx PDF Classifier malicious score 1.0000

Heuristics 5

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
PDF differential parser failed info PDF_DIFFERENTIAL_PARSE_FAILED

The cross-check parser (pdfminer.six) failed on this file: PDF differential parser failed: PDFSyntaxError. Static heuristics still ran and any of their findings above are valid; only the differential cross-check signal is missing.
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
`stream_001_off00000321.js` `56032b562569f09aab5b303448d892b8ba1b284d4ccf93c6547c02c9e98fb974`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x321	55308 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 long base64-like blob(s).

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