PDF malware analysis — malicious · c17d903c171df445

MALICIOUS

PDF

33.5 KB

MD5: 795f6e9950141013b1eb029e994bce35 SHA-1: 1ab6974418abd89eefbbaabf1271dcff53020de0 SHA-256: c17d903c171df4457148581b7e2b0961c12abc3e2d6270b0bc893a989c694e76

216 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was flagged as malicious by multiple engines, including ClamAV which identified it as 'Heuristics.PDF.ObfuscatedNameObject'. It contains embedded Flash content (YHauEZnd.swf) and a JavaScript stream, both of which are common vectors for delivering exploits or secondary payloads. The presence of these embedded artifacts strongly suggests an attack pattern aimed at exploiting vulnerabilities within the PDF reader or the embedded content itself.

Machine Learning

Nyx PDF Classifier malicious score 0.9996

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
`YHauEZnd.swf` `82959a74bd2f365dbaff0af8a126e8d6efed63f658723f179f7020ea3628ed8b`	pdf-embedded-file	PDF EmbeddedFile object 16 at offset 0x1778	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` `1dcaf6ada82eec95e3f5c757ede818412bde1e8011e45d76de345d4dd6a28a5c`	pdf-javascript-stream	PDF /JS object 6 at offset 0x140	4220 bytes

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