PDF malware analysis — malicious · 9feece5b9ac58039

MALICIOUS

PDF

13.9 KB

MD5: 72bfd6acfc420bd0ea19002d825354b6 SHA-1: c15d41aabb928c9d9b9c5d0726643b884fa50f69 SHA-256: 9feece5b9ac5803995f3ed7fff1700ddd87fbc0777612762ff1f67b4b3a3ec31

86 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell

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 second-stage payload. The presence of ASCIIHexDecode and ASCII85Decode filters further supports the likelihood of exploit code.

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` `4377a63b8e35fe7ea470854eb986e68dc3150cba6cbbc314f6e4bc141e506e69`	pdf-javascript-stream	PDF /JS object 3332 at offset 0x3584	418 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s).

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