PDF malware analysis — malicious · 4084c1a7c7a74f3a

MALICIOUS

PDF

14.0 KB

MD5: 51928d6fb8af7ef0445fb3c33a50f2b3 SHA-1: 74c61a615f06d032e9f0a237d7814565c7a0e4ac SHA-256: 4084c1a7c7a74f3a0c8b28654a6d82018a4d58adbbe11aebf2c3a2ba2bad174d

86 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The PDF file contains embedded JavaScript, indicated by multiple heuristic firings including PDF_JAVASCRIPT and PDF_JS. The JavaScript stream, named 'javascript_obj3332_000.js', is obfuscated and uses an unescape() call, suggesting it's designed to download and execute a malicious payload. The presence of ASCIIHexDecode and ASCII85Decode filters further supports the likelihood of exploit code within the PDF structure.

Heuristics 6

unescape() call high PDF_UNESCAPE

unescape() found — often used to decode shellcode in PDF JS exploits
ASCIIHexDecode filter (with exploit indicators) medium PDF_FILTER_HEX

Hex-encoding filter present alongside exploit delivery indicators — often used to hide payload or shellcode bytes
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.
ASCII85Decode filter (with exploit indicators) low PDF_FILTER_85

ASCII85 encoding filter present alongside exploit delivery indicators — uncommon outside of obfuscation
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_obj3332_000.js` `0df2924b8f8dcb28ee74f1eaa252208b5e12afa2c2aed601fd2b0a4b6ef61af3`	pdf-javascript-stream	PDF /JS object 3332 at offset 0x35AC	462 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s).

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