PDF malware analysis — malicious · f0e55a50a0b8b46b

MALICIOUS

PDF

14.1 KB

MD5: 664ac0009654e05a624428d1f5c88d44 SHA-1: bc2ecdfa13dfd914f1eb3b66d6f34020ceace4ed SHA-256: f0e55a50a0b8b46b077ec3009d22dc4648ff83db3e97f237f55a6a9eca36c1d5

86 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File T1027 Obfuscated Files or Information

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', appears to be obfuscated, as suggested by the EXTRACTED_FILE_STATIC_TRIAGE heuristic. The presence of PDF_UNESCAPE, PDF_FILTER_HEX, and PDF_FILTER_85 filters further suggests an attempt to exploit vulnerabilities within the PDF reader. The primary function of the script is likely to download and execute a second-stage payload.

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` `061e28b62cdc637cabf56946c59276168de5732fcc2d403de36726087e689301`	pdf-javascript-stream	PDF /JS object 3332 at offset 0x3634	469 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s).

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