PDF malware analysis — malicious · cefaf2afea874645

MALICIOUS

PDF

12.4 KB

MD5: 02d330276697a42993ea8d5c21e05f83 SHA-1: 7387ebf0fe137cfdc9dc782430436bd159172aef SHA-256: cefaf2afea874645a969c1948e5e438da649caa9d18f9131cc34bb7e7acbef88

106 Risk Score

Malware Insights

MITRE ATT&CK

T1204.002 Malicious File: Malicious File

The PDF sample was flagged as malicious by a machine learning classifier and ClamAV, with the latter identifying it as Pdf.Exploit.Pdfka-9. Heuristics indicate the presence of embedded JavaScript, which is a common technique for exploiting PDF vulnerabilities to download and execute further malicious content. No document body or specific script content was available for analysis, but the combination of heuristics and exploit detection strongly suggests a malicious PDF dropper.

Machine Learning

Nyx PDF Classifier malicious score 1.0000

Heuristics 3

ClamAV detection on extracted artifact critical EXTRACTED_FILE_CLAMAV

ClamAV flagged at least one file extracted from inside this sample. Even when the wrapping document carries no AV detection of its own, a hit on the carved artifact is a strong indicator the sample is a delivery vehicle.
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.

Extracted artifacts 1

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0076_000.js` `0260c15b69c20b47fd7b321dad7713a442c89159ccb2421c11231173bf6c22d4`	pdf-javascript-stream	PDF /JS object 76 at offset 0x369	11581 bytes
Detection ClamAV: Pdf.Exploit.Pdfka-9 Obfuscation or payload: unlikely

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