PDF malware analysis — malicious · 8a2205d39fd142e5

MALICIOUS

PDF

19.9 KB

MD5: 7257439c74dfe133689c03a6bdaea7e1 SHA-1: d8a337a2cfea1e4b10c5d1028c899df1290fbc42 SHA-256: 8a2205d39fd142e5380493fb3481ed03f1aaa8d40f0dc104f71079f972b4d57a

118 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The PDF sample contains multiple embedded JavaScript streams, with one stream triggering the CVE-2009-4324 vulnerability via the media.newPlayer object. The JavaScript utilizes eval() and unescape() functions, indicating obfuscation to hide its malicious intent. The primary function of the script appears to be downloading and executing a second-stage payload, as suggested by the 'eval()' and 'unescape()' calls and the presence of deobfuscated JavaScript stages.

Heuristics 5

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)
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.
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 6

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj111711_000.js` `d903654f27e31eb355ab0aa88f72c7a6c413095d54a45928df8dd66d0fb88193`	pdf-javascript-stream	PDF /JS object 111711 at offset 0x18E	2767 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s). Carved artifact contains 6 long base64-like blob(s).
`javascript_obj111712_001.js` `67db1cb57e53210b41a951a03c5dfab69a3b1c69db487ff7d926610e26804f28`	pdf-javascript-stream	PDF /JS object 111712 at offset 0xC93	14710 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s). Carved artifact contains 4 long base64-like blob(s).
`javascript_obj111713_002.js` `3744cad04bf630d332f025240d363df26f2162c3f70654510ffd0898887be02a`	pdf-javascript-stream	PDF /JS object 111713 at offset 0x463F	2332 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s). Carved artifact contains 4 long base64-like blob(s).
`legacy_pdfkit_stage_000.js` `14d9d23d619682a659b666d1537fbe47a8cc4db49b0c37d63714847d39b24a42`	deobfuscated-js	multi-marker percent-array decoded JavaScript at offset 0xC93	1080 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` `fa44c3a6a5df9dd0c4918db03b8a33dc1e24bba8204a13d66510a81c2b2e6f17`	deobfuscated-js	multi-marker percent-array decoded JavaScript at offset 0x463F	166 bytes
`legacy_pdfkit_stage_002.js` `1c96ee696ace6892c53355b89b1ea96f52cca8e3a6b5b4fe55099399bf524996`	deobfuscated-js	multi-marker percent-array combined decoded JavaScript at offset 0xC93	1247 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 eval/decoder/string-building token(s).

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