PDF malware analysis — malicious · a5b21cd1332db1ac

MALICIOUS

PDF

150.1 KB

MD5: 2904f07b0d0e811fa1619bdd1633cc16 SHA-1: be42c0785227bae4a65045aa7dcdaf5b36769d8a SHA-256: a5b21cd1332db1ac9ee93fa5db6ee6856fae04e7d325161b860fe394400ded61

186 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The PDF file contains embedded JavaScript and a RichMedia (Flash) object, indicating an exploit attempt. ClamAV detected this as Pdf.Exploit.Agent-35955. The embedded JavaScript stream, named javascript_obj0006_000.js, is likely responsible for downloading and executing a secondary payload, as suggested by the 'PDF_JAVASCRIPT' and 'PDF_JS' heuristic firings. An additional embedded file, embedded_file_obj0014.bin, was also extracted.

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
`embedded_file_obj0014.bin` `c2b666a3ef4c191b77b78c037656e50477b8ba3d35fd61ae843a3a1f4d41c5c1`	pdf-embedded-file	PDF EmbeddedFile object 14 at offset 0x19D8	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` `829f39d09ba0ddc0f3c26f4911f7ed36144e43e259f5c14b8193c31e8e401034`	pdf-javascript-stream	PDF /JS object 6 at offset 0x126	20303 bytes

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