PDF malware analysis — malicious · de1b16ee403de30c

MALICIOUS

PDF

27.9 KB

MD5: fd315a389e8988d10aed2e518fd0401f SHA-1: bf0c6730023699bc5ed0593f35b19c0fcb695516 SHA-256: de1b16ee403de30ca4a960b39feb7a888f1f1e6017c03a76e35db21f2d3ceab1

216 Risk Score

Malware Insights

MITRE ATT&CK

T1559.002 Component Object Model Hijacking T1204.002 Malicious File

The PDF contains embedded JavaScript and RichMedia (Flash) content, which is flagged as malicious by ML classifiers and ClamAV. The embedded artifact 'ZtKtSgei.swf' is also identified as suspicious. This combination strongly suggests the PDF is designed to exploit vulnerabilities and execute malicious Flash content, likely as a downloader or initial access vector.

Machine Learning

Nyx PDF Classifier malicious score 0.9972

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 1

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`ZtKtSgei.swf` `c2b666a3ef4c191b77b78c037656e50477b8ba3d35fd61ae843a3a1f4d41c5c1`	pdf-embedded-file	PDF EmbeddedFile object 16 at offset 0x5B6	26774 bytes
Detection ClamAV: Pdf.Exploit.Agent-35955 Obfuscation or payload: likely Carved artifact entropy is 7.99, consistent with packed or encrypted content.

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