PDF malware analysis — malicious · 83ed2ec1536c70b2

MALICIOUS

PDF

31.2 KB

MD5: ae52318f1b67406412705e6812b3272a SHA-1: f980a383c66ee2225b5e121959f67b5f465b740b SHA-256: 83ed2ec1536c70b2fa5336dd09c0dc1178895ded4ccfe449a4b9a42a4055b474

106 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1566.001 Spearphishing Attachment T1204.002 Malicious File

The PDF file contains embedded JavaScript and a Flash object, indicated by the PDF_JAVASCRIPT, PDF_JS, and PDF_RICHMEDIA heuristics. The presence of eval() calls and suspicious extracted artifacts like 'ZdhyXAVZwLWfPiH.swf' and JavaScript files suggests an attempt to execute arbitrary code. The primary intent appears to be the delivery of a secondary payload, likely through the embedded Flash or JavaScript.

Heuristics 6

RichMedia (Flash) high PDF_RICHMEDIA

PDF contains /RichMedia (Adobe Flash) which is a historic exploit vector
eval() call high PDF_EVAL

eval() found — commonly used for obfuscated exploit execution
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 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`ZdhyXAVZwLWfPiH.swf` `767382813fc770c9716554c3266b22eee1636037ca964af05acf6ff66db4a27d`	pdf-embedded-file	PDF EmbeddedFile object 16 at offset 0x11DE	26993 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact entropy is 7.98, consistent with packed or encrypted content.
`javascript_obj0006_000.js` `7d7b362bbccafdbf48f7103bf0724abbf8c104d535d590b89d84da7777a74622`	pdf-javascript-stream	PDF /JS object 6 at offset 0xF9	3462 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s).
`legacy_pdfkit_stage_000.js` `5c8ead92ca813c159f98057d90d455f6f6d36f5d43decdc8f9436a4b0e94d45e`	deobfuscated-js	split-join delimiter stripped JavaScript at offset 0xDB1	2125 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s).

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