PDF malware analysis — malicious · 410ef3d65da13b33

MALICIOUS

PDF

24.5 KB

MD5: 537bb70cc45d574f2d20530d79c728ef SHA-1: d8467f565e03410e0ee1b1ed3dd7ca0b640a2594 SHA-256: 410ef3d65da13b33306de91afe8942264943c86ba374510d20272f9114ced664

136 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 Command and Scripting Interpreter: PowerShell T1059.003 Command and Scripting Interpreter: Windows Command Shell T1204.002 Malicious File: Malicious File

The PDF file contains embedded JavaScript, which is obfuscated using eval() and unescape() functions, along with ASCIIHexDecode filters. This JavaScript is likely designed to download and execute a second-stage payload. The presence of these obfuscation techniques strongly suggests malicious intent, aiming to evade detection.

Heuristics 6

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)
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
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 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0011_000.js` `30df31c8eef6601b3601fd1e549ac6bb718f5b6e4fa4a2a064de4d5ad5e8f65e`	pdf-javascript-stream	PDF /JS object 11 at offset 0x488F	1601 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s).
`stream_000_off000000cb.js` `9df6d128ea1ba337586095a07a790e2c3aa5e2de4e692707e0c9208633a2b4d2`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0xCB	67010 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 eval/decoder/string-building token(s). Carved artifact contains 2 long hex-escaped blob(s).

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