PDF malware analysis — malicious · a79788dc1bbd1491

MALICIOUS

PDF

31.7 KB

MD5: e033a85e0030d1484c38ad2612a04f79 SHA-1: 49e2642d7a3a587ada2d512b514d45fd4b99a961 SHA-256: a79788dc1bbd149171dcc208bc754a53da51f24c0af82a587494cda960e14e12

216 Risk Score

Malware Insights

MITRE ATT&CK

T1204.002 Malicious File

The PDF contains embedded JavaScript and Flash content, as indicated by the PDF_JAVASCRIPT, PDF_JS, and PDF_RICHMEDIA heuristics. ClamAV detection of 'Pdf.Exploit.Agent-35955' on both the main PDF and an extracted artifact (mXdMKeDGaB.swf) strongly suggests exploitation of a known PDF vulnerability. The ML classifier also flagged this PDF as malicious with high confidence. The embedded Flash file is likely the primary exploit vector.

Machine Learning

Nyx PDF Classifier malicious score 0.9945

Heuristics 7

ClamAV: Pdf.Exploit.Agent-35955 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Exploit.Agent-35955
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.
RichMedia (Flash) high PDF_RICHMEDIA

PDF contains /RichMedia (Adobe Flash) which is a historic exploit vector
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
`mXdMKeDGaB.swf` `c2b666a3ef4c191b77b78c037656e50477b8ba3d35fd61ae843a3a1f4d41c5c1`	pdf-embedded-file	PDF EmbeddedFile object 16 at offset 0x14D7	26774 bytes
Detection ClamAV: Pdf.Exploit.Agent-35955 Obfuscation or payload: likely Carved artifact entropy is 7.99, consistent with packed or encrypted content.
`javascript_obj0006_000.js` `7612ed5dbe86956314d92bae3daf4e582234621efcbdc298eaacf9aaf881ee32`	pdf-javascript-stream	PDF /JS object 6 at offset 0x14A	3481 bytes

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