PDF malware analysis — malicious · 48f6df2dff6513c6

MALICIOUS

PDF

31.5 KB

MD5: 745bea213bf4e2ffe34484e9147cadea SHA-1: d4621929639bba911558039bf291ce5070b216ca SHA-256: 48f6df2dff6513c60cb98b84964d2a02fc38dfd508e40a0bee6a1fd1217bd316

106 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 JavaScript T1559.002 Component Object Model

The PDF contains embedded JavaScript and a RichMedia (Flash) object. The JavaScript, particularly the eval() call, is highly suspicious and likely responsible for loading and executing the embedded Flash file 'TyPWoIJRMY.swf'. This multi-stage approach is commonly used to obfuscate the initial malicious payload and bypass security controls. The extracted JavaScript files 'javascript_obj0006_000.js' and 'legacy_pdfkit_stage_000.js' are indicative of the exploit chain.

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
`TyPWoIJRMY.swf` `767382813fc770c9716554c3266b22eee1636037ca964af05acf6ff66db4a27d`	pdf-embedded-file	PDF EmbeddedFile object 16 at offset 0x12DA	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` `4a4aa1a0c74fd77e58370513cdd62864b969d2468e77de5a61046212e95a5b2e`	pdf-javascript-stream	PDF /JS object 6 at offset 0xF9	3729 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` `bd20b5bf68f8e27425fcf4b770c03ecd304fc6ba6cd34c6e5a49d80dde34f2f8`	deobfuscated-js	split-join delimiter stripped JavaScript at offset 0xDB1	2371 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s).

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