PDF malware analysis — malicious · d03bc63c97514d14

MALICIOUS

PDF

46.2 KB

MD5: 8f264e5f8c5245b7fd718594d79dd373 SHA-1: 94dca4c7d249bf8d94cb67adbd04119ee30d2c50 SHA-256: d03bc63c97514d1415da5b0e05c4fad9275e4221c9a2b52a87d598e4c356e5be

78 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The PDF document contains embedded JavaScript, indicated by multiple heuristic firings. Specifically, the CVE-2009-4324 heuristic identifies the use of `media.newPlayer` via annotation actions, a known method for exploiting this vulnerability in older PDF readers. The deobfuscated JavaScript, named `legacy_pdfkit_stage_000.js`, likely facilitates the execution of further malicious code. The obfuscated nature of the script and the exploit technique suggest a downloader or dropper functionality.

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` `559b0c43b3692e26206dfb0e3a9378ebfd03ed520b1749f107d211b7faa43be0`	pdf-javascript-stream	PDF /JS object 8 at offset 0x1E7	2578 bytes
`legacy_pdfkit_stage_000.js` `d7155f873b59e589a73c704be477a30cf4921d43cb2c81abc4b0960cad6f3280`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0xC2D	1220 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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