PDF malware analysis — malicious · 3d76e9e77041bd7a

MALICIOUS

PDF

33.4 KB

MD5: 5b952c140769c8fac107c7c14ffe5228 SHA-1: 08c9a192db436ea6e8472282398e6a0ee78f052d SHA-256: 3d76e9e77041bd7a9540c02adc9abf99d606eb32aa9171d8ad4d6facc9fca86f

186 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The PDF file exhibits multiple indicators of malicious activity, including embedded JavaScript and Flash content. ClamAV detections for 'Heuristics.PDF.ObfuscatedNameObject' and 'Swf.Exploit.Kit-513' on an extracted SWF file strongly suggest the presence of an exploit kit or a malicious Flash exploit. The embedded JavaScript stream further supports the likelihood of a multi-stage attack. The primary attack vector appears to be leveraging vulnerabilities within the PDF reader or the embedded Flash content to execute arbitrary code.

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
`ftxQFMIICDAuBu.swf` `82959a74bd2f365dbaff0af8a126e8d6efed63f658723f179f7020ea3628ed8b`	pdf-embedded-file	PDF EmbeddedFile object 16 at offset 0x16C3	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` `035832be3adf5034a9a5608431e1f231f16618e25c0211a96e0ac0cad9b15d2f`	pdf-javascript-stream	PDF /JS object 6 at offset 0x136	4211 bytes

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