PDF malware analysis — malicious · e919d8d66ccdef30

MALICIOUS

PDF

32.9 KB

MD5: e951d0b276cf73e44c575087ab445aba SHA-1: 2cd58d89f256f6100c8489ff7f0071232fcb93a8 SHA-256: e919d8d66ccdef3047205597a84683c99d3278827038a3a6cd0ed806cf199849

218 Risk Score

Malware Insights

MITRE ATT&CK

T1204 Malicious File T1204.002 Malicious File: User Execution: Malicious Attachment

This PDF file was flagged by multiple high-severity heuristics and a machine learning classifier as malicious. It contains embedded JavaScript and a RichMedia (Flash) object, identified as RItnnkEbUJzjZZ.swf. ClamAV detection confirms this as Pdf.Exploit.Agent-35955, indicating it exploits a known PDF vulnerability to execute the embedded Flash content, likely to download and run a second-stage payload.

Machine Learning

Nyx PDF Classifier malicious score 0.9997

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
`RItnnkEbUJzjZZ.swf` `c2b666a3ef4c191b77b78c037656e50477b8ba3d35fd61ae843a3a1f4d41c5c1`	pdf-embedded-file	PDF EmbeddedFile object 16 at offset 0x199B	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` `97449e12a4a430b53619800f8256eb5d13b35ae1e5e7c499cb3ec689a0ff020f`	pdf-javascript-stream	PDF /JS object 6 at offset 0x14C	4681 bytes

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