PDF malware analysis — malicious · 91070c60925877c8

MALICIOUS

PDF

32.6 KB

MD5: 0d709da09d41d0522c75faa36b9e81c2 SHA-1: 54f206976c3bc969d944ffec2e82cafd6176ef4e SHA-256: 91070c60925877c8b8bf70c9889342504d053e58d81521b933e326acb239512c

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 a suspicious embedded file was also identified. The embedded JavaScript stream is likely responsible for downloading and executing a secondary payload, as suggested by the heuristic firings and the nature of PDF exploits.

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 0x1875	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` `101a2b705d4454f0ba012e133bfe99cb2260d138969bd6cbcb782a40f9df369f`	pdf-javascript-stream	PDF /JS object 6 at offset 0x144	4436 bytes

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