PDF malware analysis — malicious · 255d6a38fa5436c9

MALICIOUS

PDF

32.3 KB

MD5: 1842900933c157b0754b1bc2e142f6cb SHA-1: 102ddf93e5677b86f0fe3d4db6a1583ebf0b7dda SHA-256: 255d6a38fa5436c9202e7a2dfec58223eb27fb3ca156357d54ce097670e5b4b1

186 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The PDF file contains embedded JavaScript and RichMedia (Flash) content, indicating an attempt to exploit vulnerabilities. ClamAV detected this as 'Pdf.Exploit.Agent-35955', and an embedded file was also flagged as suspicious. The embedded JavaScript stream is the primary mechanism for delivering the exploit, likely leading to the download and execution of a secondary payload from the embedded file.

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_obj0016.bin` `c2b666a3ef4c191b77b78c037656e50477b8ba3d35fd61ae843a3a1f4d41c5c1`	pdf-embedded-file	PDF EmbeddedFile object 16 at offset 0x1718	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` `5ab4cb32c9dd433aa4b5aec853ce2d38b114cde3d048d64b9b1ded5c2ff524cf`	pdf-javascript-stream	PDF /JS object 6 at offset 0x148	4133 bytes

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