PDF malware analysis — malicious · 9765a8ec780a8b63

MALICIOUS

PDF

640.4 KB

MD5: 1dab8dd7623606eacb944fedb29f2d0a SHA-1: 5c9b3da01bc02658e155d9d01a2fc6973e31b029 SHA-256: 9765a8ec780a8b63265e6574aece593b79489386eaf1e26d8b26f6ac6634af7d

76 Risk Score

Malware Insights

MITRE ATT&CK

T1559.002 Component Object Model Hijacking T1059.001 PowerShell

This PDF file was flagged as malicious by an ML classifier and contains embedded JavaScript. The document body suggests it is attempting to launch an embedded OLE object named 'rfq.doc'. The presence of embedded JavaScript and the ML classification strongly indicate malicious intent, likely to execute further stages of an attack. The embedded 'rfq.doc' is a primary indicator of the malicious payload.

Machine Learning

Nyx PDF Classifier malicious score 1.0000

Heuristics 5

ASCIIHexDecode filter (with exploit indicators) medium PDF_FILTER_HEX

Hex-encoding filter present alongside exploit delivery indicators — often used to hide payload or shellcode bytes
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.
Embedded file low PDF_EMBEDDED

PDF embeds a file attachment — could carry an executable or another weaponised document as a nested payload
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 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`rfq.doc` `c18a3d5cb1232104953cf308df13f4bd987a489e4ffa0ed87e16a456e6fc0bd7`	pdf-embedded-file	PDF EmbeddedFile object 8 at offset 0x563	326989 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 80 long base64-like blob(s).
`javascript_obj0009_000.js` `2b8480aa51fc9853d3b21a786369059ef1442be8ffeb50eae877beb7200f14bf`	pdf-javascript-stream	PDF /JS object 9 at offset 0xA0015	56 bytes
`javascript_obj0009_001.js` `f286270a8c9aa1f70f5c91360077ceaf6cfae7907770446864f31ec3d7971f45`	pdf-javascript-stream	PDF /JS object 9 at offset 0xA0015	54 bytes

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