PDF malware analysis — malicious · a1cab5e7a6d0b03d

MALICIOUS

PDF

16.4 KB

MD5: 5e3516301634f313bafeaf507db95895 SHA-1: e544d3cb42144cdf2a303c5baacf90f1307f5ed4 SHA-256: a1cab5e7a6d0b03d7ed7d9704fb9ff2145421e3ccbe20fdc5e141f988d23d1f8

118 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.001 Malicious Link

The PDF sample contains heavily obfuscated JavaScript, triggered by the CVE-2009-4324 vulnerability via the media.newPlayer sink. The deobfuscated JavaScript streams indicate that the primary intent is to download and execute a second-stage payload. The obfuscation techniques and the use of a known exploit point to a malicious document designed for initial payload delivery.

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` `b5a8ee8f707ed5f24e6462f5276f8482d61a5a0e1bd797a0240c2090fccce0cd`	pdf-javascript-stream	PDF /JS object 111711 at offset 0x18E	2814 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s). Carved artifact contains 5 long base64-like blob(s).
`javascript_obj111712_001.js` `0eca76d6e3a6adaea83db699e9b09e25f2c78dab59b7c422e0222d5b89a75512`	pdf-javascript-stream	PDF /JS object 111712 at offset 0xCC2	10838 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_obj111713_002.js` `0392b72b27b7d75dbe81d8aa15016485f053e4baaf03d6ce8f826cddf9ecd9f5`	pdf-javascript-stream	PDF /JS object 111713 at offset 0x374E	2502 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 0xCC2	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 0x374E	166 bytes
`legacy_pdfkit_stage_002.js` `1c96ee696ace6892c53355b89b1ea96f52cca8e3a6b5b4fe55099399bf524996`	deobfuscated-js	multi-marker percent-array combined decoded JavaScript at offset 0xCC2	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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