PDF malware analysis — malicious · a6a3ef4dfb463fa9

MALICIOUS

PDF

32.8 KB

MD5: 8d43c5cc3f474210bb4c1be3fd54df6e SHA-1: 7ab903020fb573be7f86713098457b2d2248c339 SHA-256: a6a3ef4dfb463fa9c66cfc9c3b1d8dedd828475e913a0c971df4d1ff1fa9091e

186 Risk Score

Malware Insights

MITRE ATT&CK

T1204.002 Malicious File T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF file contains embedded JavaScript and a Flash object (XhoCsRybyApovz.swf), both of which are flagged as suspicious by heuristics. ClamAV detection of 'Pdf.Exploit.Agent-35955' on both the main file and the extracted SWF indicates a known exploit. The embedded JavaScript is likely responsible for triggering the exploit and loading the Flash content, which is a common delivery mechanism for further malicious activity.

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
`XhoCsRybyApovz.swf` `c2b666a3ef4c191b77b78c037656e50477b8ba3d35fd61ae843a3a1f4d41c5c1`	pdf-embedded-file	PDF EmbeddedFile object 16 at offset 0x190D	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` `156a28f623f7f5240004e5f90359143e6490a790f26ed6c21b7bb29618cd3133`	pdf-javascript-stream	PDF /JS object 6 at offset 0x13A	4518 bytes

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