PDF malware analysis — malicious · 12b36ceef1e67bdb

MALICIOUS

PDF

5.9 KB

MD5: 3905193537200e947335759f8c61f0ea SHA-1: 0ed3c33ede1fb47d4f5bce2868eaf3160cbb5875 SHA-256: 12b36ceef1e67bdb26fd296383838a806ff89672ff70e7a714affdbdebd8e8a2

116 Risk Score

Malware Insights

MITRE ATT&CK

T1059.007 JavaScript T1105 Ingress Tool Transfer

The PDF file contains embedded JavaScript that attempts to evaluate a string constructed from a data object. The JavaScript then calls a function with the content of the data object, which is likely a second-stage payload. The embedded file 'embedded_file_obj0012.bin' is highly suspicious and likely the payload. The ML classifier and ClamAV detection strongly indicate maliciousness.

Machine Learning

Nyx PDF Classifier malicious score 0.9999

Heuristics 5

ClamAV: Pdf.Dropper.Agent-7230998-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Dropper.Agent-7230998-0
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 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`embedded_file_obj0012.bin` `caa66c0bf2c76db3461cdd3d01a702d0fa9dbe5bf50ecf515fd0aa0ee82e2025`	pdf-embedded-file	PDF EmbeddedFile object 12 at offset 0x428	150300 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 145 long base64-like blob(s).
`javascript_obj0007_000.js` `1bc4bf38a788adcc495fb84f1f085cb4c62f9f214ddac09c9e3dd447973e35e6`	pdf-javascript-stream	PDF /JS object 7 at offset 0x1CC	254 bytes

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