PDF malware analysis — malicious · 1ae18931f02d8308

MALICIOUS

PDF

352.0 KB

MD5: 46e139378ec5339f39b879178909d5ca SHA-1: b7522f6584b6f958ab8c5bbca36a67f3ca966972 SHA-256: 1ae18931f02d83085481446c0fced4626287443f9a8bd1bde993d1d251eb4a8f

206 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1204.002 Malicious File

The PDF file contains embedded JavaScript and a RichMedia (Flash) object, identified as WpuVlEGnF.swf. ClamAV detections indicate this is a known exploit (Pdf.Exploit.Agent-35955). The presence of these elements strongly suggests the PDF is designed to exploit vulnerabilities and execute the embedded SWF file, likely as a downloader for further malicious activity.

Heuristics 8

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
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 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`WpuVlEGnF.swf` `c2b666a3ef4c191b77b78c037656e50477b8ba3d35fd61ae843a3a1f4d41c5c1`	pdf-embedded-file	PDF EmbeddedFile object 16 at offset 0x4E2B6	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` `333042fc77621860f9b16228cd1bd11ec0f99d0fa6930f548cbf65181a57aac5`	pdf-javascript-stream	PDF /JS object 6 at offset 0x13E	6441 bytes

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