PDF malware analysis — malicious · 96e05c48c5189bc7

MALICIOUS

PDF

1.4 KB

MD5: b53ca3b43d0955e87c1851660af26843 SHA-1: 25ae0c22cc2e60da3a3c8bbca20defbf131ca029 SHA-256: 96e05c48c5189bc7c32f5edac303ce9768dae9157280a858511fd0f4466cb187

208 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The critical heuristic CVE_2009_4324 indicates exploitation of a known PDF vulnerability. The presence of embedded JavaScript, specifically the unescape() call and ML classifier flagging, strongly suggests malicious intent. The ClamAV detection as Pdf.Dropper.Agent-1828849 further confirms its malicious nature. The embedded JavaScript is likely responsible for downloading and executing a secondary payload, a common dropper behavior.

Machine Learning

Nyx PDF Classifier malicious score 1.0000

Heuristics 6

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. (matched in decompressed stream)
ClamAV: Pdf.Dropper.Agent-1828849 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Dropper.Agent-1828849
unescape() call high PDF_UNESCAPE

unescape() found — often used to decode shellcode in PDF JS exploits (matched inside decoded stream)
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_obj111711_000.js` `ed214d008ca7f8fad0affc792159f2b30ce479dc90c5348e0751937c74ebe0c2`	pdf-javascript-stream	PDF /JS object 111711 at offset 0x197	291 bytes
`javascript_obj111712_001.js` `9a319f6a5a16fe8232396acd511146ed1016d7f280259bd504eb5d4b14ed4ae5`	pdf-javascript-stream	PDF /JS object 111712 at offset 0x2B2	942 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 eval/decoder/string-building token(s).
`javascript_obj111713_002.js` `d2f98bec78aa096efa5aca99b701d5e6b9a8e2cf728fb7e79bf248862bacf14b`	pdf-javascript-stream	PDF /JS object 111713 at offset 0x505	70 bytes

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