PDF malware analysis — malicious · e07a46184db47035

MALICIOUS

PDF

6.5 KB

MD5: 04dfc2c4503b5b7754cde4504cc43eae SHA-1: 0638abcdea4f04b14636fa36e9d48346877560df SHA-256: e07a46184db47035844ab677b88f3080ca86e33e9d0e7e753a2b5c8618442fa3

268 Risk Score

Malware Insights

MITRE ATT&CK

T1059 Command and Scripting Interpreter

The file is a PDF that contains embedded JavaScript and utilizes the JBIG2Decode filter, triggering critical heuristics for the CVE-2009-0658 exploit. This exploit is known to target Adobe Reader and is often used to download and execute further malicious content. The ML classifier strongly indicates maliciousness, and ClamAV also flagged it. The presence of obfuscated JavaScript further supports the malicious intent, likely to download and run a secondary payload.

Machine Learning

Nyx PDF Classifier malicious score 0.9999

Heuristics 8

Adobe Reader JBIG2Decode generic heap-spray exploit critical CVE likely CVE_2009_0658_GENERIC_SPRAY

PDF combines JBIG2Decode image streams with JavaScript heap-spray or decoder scaffolding. This is likely CVE-2009-0658-family Adobe Reader JBIG2 exploitation, but it lacks the stricter Reader-9 version gate or decoded page-word shellcode fingerprint required by the exact rule.
JBIG2 + active content high CVE related PDF_JBIG2_ACTIVE_CONTENT

JBIG2Decode appears with JavaScript/XFA/RichMedia — a related indicator for JBIG2 parser-exploit families including CVE-2021-30860 and CVE-2009-0658, but not a unique CVE fingerprint.
ClamAV: Heuristics.PDF.ObfuscatedNameObject critical CLAMAV_DETECTION

ClamAV detected this file as malware: Heuristics.PDF.ObfuscatedNameObject
unescape() call high PDF_UNESCAPE

unescape() found — often used to decode shellcode in PDF JS exploits (matched inside decoded stream)
JBIG2Decode filter medium PDF_JBIG2

JBIG2 image decoder present — historically used in zero-click exploits
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 1

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0006_000.js` `8900d00e6a045b3fab9b2c4095871fe1a1b8b1c03a5f9a6e38cb402bfff3e487`	pdf-javascript-stream	PDF /JS object 6 at offset 0x231	5351 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 4 eval/decoder/string-building token(s).

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