PDF malware analysis — malicious · 0758d9e366215161

MALICIOUS

PDF

10.1 KB

MD5: 005be72afa303075ff283f8c3234d80d SHA-1: b0c604a2e5ede9eb94fcfe93c79e2ce347c86695 SHA-256: 0758d9e366215161eb6198f9ec294d4c7b8e3d00148bd5ffcabf960e41cf80f5

90 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell

The PDF file contains embedded JavaScript, flagged by multiple heuristics as malicious. The ML classifier strongly indicates maliciousness. The JavaScript stream, named 'javascript_obj0007_000.js', is obfuscated and likely responsible for downloading and executing a secondary payload. The specific intent of the script could not be fully determined due to obfuscation, but its presence is a strong indicator of malicious activity.

Machine Learning

Nyx PDF Classifier malicious score 1.0000

Heuristics 5

unescape() call high PDF_UNESCAPE

unescape() found — often used to decode shellcode in PDF JS exploits (matched inside decoded stream)
JavaScript action low PDF_JAVASCRIPT

PDF contains a /JavaScript action. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
Embedded JS stream low PDF_JS

PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
PDF differential parser failed info PDF_DIFFERENTIAL_PARSE_FAILED

The cross-check parser (pdfminer.six) failed on this file: PDF differential parser failed: PSSyntaxError. 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
`javascript_obj0007_000.js` `ffcf167cc81e026af59061f08b3576d2fb37708360a85cc84130f90fc7b09877`	pdf-javascript-stream	PDF /JS object 7 at offset 0x233	44576 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 221 eval/decoder/string-building token(s).

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