PDF malware analysis — malicious · 41ef20344ec9406c

MALICIOUS

PDF

8.3 KB

MD5: 0761206e7932595702e3c35b530e1347 SHA-1: aa675684ab5293d214ab580ccafa28ccdd1d4aa6 SHA-256: 41ef20344ec9406cccb414ee14fbae0e5097a9c396bb7d15590b2f7a22c14df5

90 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell

The PDF contains embedded JavaScript, indicated by the PDF_JAVASCRIPT and PDF_JS heuristics. The ML classifier strongly flags this PDF as malicious. The unescape() function is used, suggesting obfuscation of the JavaScript payload. The extracted artifact javascript_obj0007_000.js is likely responsible for downloading and executing a second-stage payload.

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` `3f80811a759a4687c1c1041942300f299688dd5ce6a54b8bfadc45c85f73a21b`	pdf-javascript-stream	PDF /JS object 7 at offset 0x233	36910 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 183 eval/decoder/string-building token(s).

Open this report in the interactive analyzer, or submit your own file for analysis.