PDF malware analysis — malicious · bd04b403dda35cc4

MALICIOUS

PDF

16.6 KB Created: 2009-01-35 62:12:26 Authoring application: Adobe

MD5: 3f4cd7569aff5d1857a3a5e690b677c4 SHA-1: dd20d47d5cd477e6f93cc0f1e8dac6c1344f20fe SHA-256: bd04b403dda35cc4469dd3d23f2d05764446e320a23b819c6804770c57041c5f

66 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1059.007 JavaScript

The PDF file contains multiple embedded JavaScript streams, several of which are heavily obfuscated and utilize `eval()` and `String.fromCharCode()` functions. These scripts are indicative of a downloader or droppper mechanism, aiming to execute further malicious code. The presence of multiple obfuscated JavaScript artifacts strongly suggests an attempt to conceal the execution of a second-stage payload.

Heuristics 5

eval() call high PDF_EVAL

eval() found — commonly used for obfuscated exploit execution (matched inside decoded stream)
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.
String.fromCharCode low PDF_FROMCHARCODE

String.fromCharCode found — used to construct payload strings dynamically. Common in benign JavaScript libraries for codepoint manipulation, so this alone is informational; weaponised use is also caught by the dedicated fromCharCode-stage and exploit-shape rules. (matched inside decoded stream)
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 6

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0012_000.js` `52e0ab6a213ad2925341f5b6520024f7e78ca2b27c3601e883639cc7e3151572`	pdf-javascript-stream	PDF /JS object 12 at offset 0x33A4	3629 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 eval/decoder/string-building token(s).
`javascript_obj0013_001.js` `c9ee767ce59b5287a29c3c7e03e46f7a4aff107f820a86c2bda324ccedf02cf0`	pdf-javascript-stream	PDF /JS object 13 at offset 0x3923	2213 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 eval/decoder/string-building token(s).
`javascript_obj0014_002.js` `403ac0a583de45fc70c6692c19d179deaddc0714eb1f5e9140e7ccbd5a25e2f6`	pdf-javascript-stream	PDF /JS object 14 at offset 0x3CAA	1752 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 eval/decoder/string-building token(s).
`stream_000_off000001be.js` `28feca3dfb478fb3825bedf1a9c67052b58ac4e93f09137a7ca411b68e27fa88`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x1BE	127238 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 eval/decoder/string-building token(s).
`stream_001_off000014d7.js` `9add3ef78e4f0f9f35331e779be8b3f63fbf8b6d20dd4c58397c172e696b2324`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x14D7	72272 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 eval/decoder/string-building token(s).
`stream_002_off00002329.js` `4bb9be229f832f2a052abbbc7c22a25f83a36538b42e3e3fe520f374d3a9f29b`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x2329	81270 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 eval/decoder/string-building token(s).

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