PDF malware analysis — malicious · 999d30989f18cd31

MALICIOUS

PDF

2.0 KB

MD5: 85ab385bdbc725d3c55c849250a7a579 SHA-1: dc96e04e5dbe35d3de573b1a16c58da5be7506d4 SHA-256: 999d30989f18cd315a1338c97365d9b63351cf4214ce80e5ceb83ffdb7a072df

116 Risk Score

Malware Insights

MITRE ATT&CK

T1027 Obfuscated Files or Information T1204.002 Malicious File: User Execution: Malicious JavaScript

The PDF file contains embedded JavaScript that utilizes eval() and unescape() functions, indicating obfuscation and dynamic code execution. This pattern is commonly used to download and execute further malicious content. The high scores for PDF_EVAL and PDF_UNESCAPE heuristics, along with the presence of an extracted JavaScript file, strongly suggest this attack vector. The lack of a document body means the rationale is based solely on the embedded script's behavior.

Heuristics 5

eval() call high PDF_EVAL

eval() found — commonly used for obfuscated exploit execution (matched inside decoded stream)
unescape() call high PDF_UNESCAPE

unescape() found — often used to decode shellcode in PDF JS exploits (matched inside decoded stream)
Suspicious extracted artifact medium 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.
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.

Extracted artifacts 1

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0009_000.js` `9c93344efe50d9b523f7f6f02d83b6fa55d5a031032308ae82ba920e6a8bc66e`	pdf-javascript-stream	PDF /JS object 9 at offset 0xEF	7357 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 4 eval/decoder/string-building token(s). Carved artifact contains 1 long hex-escaped blob(s).

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