PDF malware analysis — malicious · 2c65ebeaea077474

MALICIOUS

PDF

31.3 KB

MD5: 7261fce00e4c3395b573ab85a0651535 SHA-1: 046950224d87327d744295c879bb67825c9da704 SHA-256: 2c65ebeaea0774744c32a2908f9f4151518a64df013217ecbffa4ecdf718655a

226 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 JavaScript T1204.002 Malicious File

The PDF file contains embedded JavaScript and a Flash object (SWF file), as indicated by the PDF_JAVASCRIPT, PDF_JS, and PDF_RICHMEDIA heuristics. The critical ClamAV detection and the presence of eval() calls suggest that the JavaScript is designed to execute malicious code. The embedded SWF file, ANChDCzpdMf.swf, is likely the next stage of the attack, potentially delivering a further payload. The extracted JavaScript files, javascript_obj0006_000.js and legacy_pdfkit_stage_000.js, are also considered IOCs.

Heuristics 8

ClamAV: Pdf.Exploit.Agent-35955 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Exploit.Agent-35955
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
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
`ANChDCzpdMf.swf` `c2b666a3ef4c191b77b78c037656e50477b8ba3d35fd61ae843a3a1f4d41c5c1`	pdf-embedded-file	PDF EmbeddedFile object 16 at offset 0x130C	26774 bytes
Detection ClamAV: Pdf.Exploit.Agent-35955 Obfuscation or payload: likely Carved artifact entropy is 7.99, consistent with packed or encrypted content.
`javascript_obj0006_000.js` `bfee5abcede55e2bf788c709ce74048af278da169138173c083e70714ed9751d`	pdf-javascript-stream	PDF /JS object 6 at offset 0xEC	3825 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` `fc06814507374a33e95795a0a0dc57ef6c901b24c8d74c13e259bd5d9e82006d`	deobfuscated-js	split-join delimiter stripped JavaScript at offset 0xDA2	2452 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s).

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