PDF malware analysis — malicious · c1180c7a656178b3

MALICIOUS

PDF

111.6 KB Authoring application: PyPDF2

MD5: 382088dd3cf5c3e3cb3c95417685a2e5 SHA-1: acbd76aafae926ecb1441c6646c17b88ecc4581f SHA-256: c1180c7a656178b327b2f54bc3757254594c592f913f2b0a5f0769094ed698d3

90 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1059.007 JavaScript

This PDF contains obfuscated JavaScript streams, indicated by the PDF_JAVASCRIPT and PDF_JS heuristics. The ML_NYX_PDF_MALICIOUS classifier strongly suggests malicious intent. The presence of eval() calls within the JavaScript further supports the likelihood that it's designed to download and execute a secondary payload, a common technique for malware delivery. No specific family could be identified due to the heavy obfuscation.

Machine Learning

Nyx PDF Classifier malicious score 1.0000

Heuristics 5

eval() call high PDF_EVAL

eval() found — commonly used for obfuscated exploit execution
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 paints image(s) but contains no text operators info PDF_IMAGE_ONLY_LURE

PDF has 1 image XObject(s) and the content stream contains no text-emitting operators (BT/ET, Tj, TJ, ', ") in either raw bytes or decompressed streams — this is the screenshot-as-PDF pattern used to bypass text-based scanners and to deliver instructions purely through rendered pixels. It is informational unless paired with invisible links or risky URI context.
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 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0004_000.js` `cda638c9e22f9a68dc6570f4e6a71a4c046d5f3a5467475fb1c9af678bd2ecf1`	pdf-javascript-stream	PDF /JS object 4 at offset 0x145	99337 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s).
`javascript_obj0004_001.js` `75ad688b3b86b84e81fee20b13eaa22d76f44d42a20559a7b0b067f4a986fc0c`	pdf-javascript-stream	PDF /JS object 4 at offset 0x145	97978 bytes

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