PDF malware analysis — malicious · cdf1ee1b1ed5a84a

MALICIOUS

PDF

33.3 KB

MD5: 1923053bbd23eba9d893d070c235c8c4 SHA-1: 2dc9ce27c9d423b6632767a41a5056619987e19c SHA-256: cdf1ee1b1ed5a84aea80e4802853794abd2b5e30f3239f9de980ffee82d2bab9

216 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The PDF file exhibits multiple high-severity heuristic firings, including PDF_RICHMEDIA and ML_NYX_PDF_MALICIOUS, indicating malicious intent. ClamAV detections on both the main file and an extracted SWF artifact further confirm its malicious nature. The presence of embedded JavaScript and a Flash object (tSVibcxlb.swf) suggests an attempt to exploit vulnerabilities or download further malicious content.

Machine Learning

Nyx PDF Classifier malicious score 0.9949

Heuristics 7

ClamAV: Heuristics.PDF.ObfuscatedNameObject critical CLAMAV_DETECTION

ClamAV detected this file as malware: Heuristics.PDF.ObfuscatedNameObject
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
`tSVibcxlb.swf` `82959a74bd2f365dbaff0af8a126e8d6efed63f658723f179f7020ea3628ed8b`	pdf-embedded-file	PDF EmbeddedFile object 16 at offset 0x1690	27931 bytes
Detection ClamAV: Swf.Exploit.Kit-513 Obfuscation or payload: likely Carved artifact entropy is 7.99, consistent with packed or encrypted content.
`javascript_obj0006_000.js` `5a7bfc686fb5bfbdbf168f008bd28e3692a22b41dbe211617d484725c0526978`	pdf-javascript-stream	PDF /JS object 6 at offset 0x14A	4026 bytes

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