PDF malware analysis — malicious · 2dcd85d8278e28b1

MALICIOUS

PDF

79.3 KB

MD5: bc2ce5272c7bb5052d454953bde46387 SHA-1: 365ee3fdd6aa870065f4b401dc17ba7a30b79b0c SHA-256: 2dcd85d8278e28b187de92ee65fd527d2df7b9697f9ff856736c75bf8356bb36

78 Risk Score

Malware Insights

MITRE ATT&CK

T1204.002 Malicious File: Malicious File

The PDF sample contains embedded JavaScript, identified by the PDF_JAVASCRIPT and PDF_JS heuristics. A critical heuristic, CVE_2009_4324, indicates the exploitation of a vulnerability related to media.newPlayer, which is a known vector for PDF exploits. The deobfuscated JavaScript, legacy_pdfkit_stage_000.js, likely downloads and executes a second-stage payload, as suggested by the 'Suspicious extracted artifact' heuristic. The DOC BODY content appears to be obfuscated script fragments, further supporting the malicious nature.

Heuristics 4

media.newPlayer — CVE-2009-4324 critical CVE exact CVE_2009_4324

PDF JavaScript calls media.newPlayer — CVE-2009-4324 is a use-after-free in Adobe Reader's multimedia plugin triggered by media.newPlayer(). Actively exploited as a zero-day in December 2009. (identified after JavaScript deobfuscation)
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.
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
`javascript_obj0008_000.js` `e4b558076eab45138083a3728f3ecaaf62c24e127c4b800635ccc8dd5608db2e`	pdf-javascript-stream	PDF /JS object 8 at offset 0x1E7	3766 bytes
`legacy_pdfkit_stage_000.js` `2ef8c6f32578b2c33ae54b85f595204edb0c24180c1b62b22cda8474f61d0a09`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x10D1	2552 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 eval/decoder/string-building token(s).
`legacy_pdfkit_stage_001.js` `42025b552c7960b53abcd8cd732b01c8d109eccfdfefc352b9826c4d5807d414`	deobfuscated-js	cross-stage annotation API aliases at offset 0x1E7	81 bytes

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