PDF malware analysis — malicious · 28aaeaea1be778e3

MALICIOUS

PDF

31.1 KB

MD5: 4026733e8f5f3925c613381a6dc545c2 SHA-1: fb447c623c0e6b4714d6e366dc31e2b5ea8b548d SHA-256: 28aaeaea1be778e37331e058f21de212a5cf5749a9b137206e01650d0d09b2f4

106 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1566.001 Spearphishing Attachment

The PDF file contains embedded JavaScript and a Flash object (ZdhyXAVZwLWfPiH.swf), as indicated by the PDF_JAVASCRIPT, PDF_JS, and PDF_RICHMEDIA heuristics. The presence of an eval() call and suspicious extracted artifacts suggests that the embedded scripts are designed to execute malicious code. The primary intent appears to be the delivery of a second-stage payload, likely exploiting vulnerabilities within the PDF reader or Flash player.

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 0x117F	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` `442ea124d200ad4238a2da4be5d0a32516199d19f006802a60b536091cdb013e`	pdf-javascript-stream	PDF /JS object 6 at offset 0xF9	3367 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` `1e190cd386825fc3330b715940bae727e96e6948b085f4fa7cc3d4c94f737af8`	deobfuscated-js	split-join delimiter stripped JavaScript at offset 0xDB1	2041 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s).

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