PDF malware analysis — malicious · 20e450350a0ce857

MALICIOUS

PDF

8.4 KB

MD5: 6807497c19fe6da3a509ada059f43a5f SHA-1: 2442bce55dca707e49f4316991ad773d0bf9caf4 SHA-256: 20e450350a0ce8572af88dd973bf998b45f9c33cccc3f1ed8b60f462340b2c10

78 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.001 Malicious Link

The PDF file contains embedded JavaScript that is obfuscated and likely malicious, as indicated by the 'CVE_2007_5659' heuristic firing. This heuristic specifically mentions the use of 'Collab.collectEmailInfo' and a string-reversal technique to decode a second-stage payload. The JavaScript is designed to exploit a known vulnerability in older versions of Adobe Reader, leading to arbitrary code execution. The primary attack vector is the exploitation of CVE-2007-5659.

Heuristics 4

Collab.collectEmailInfo — CVE-2007-5659 critical CVE exact CVE_2007_5659

PDF JavaScript calls Collab.collectEmailInfo — CVE-2007-5659 is a buffer overflow in Adobe Reader triggered by a long argument or heap-sprayed message field passed to Collab.collectEmailInfo(). Part of a series of Acrobat JS API exploits. (identified after JavaScript deobfuscation)
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.
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 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0001_000.js` `81ede3e28f82ec5085441f4a0e24122384799a0ed60aa7e1af00f52a97c82f72`	pdf-javascript-stream	PDF /JS object 1 at offset 0xF	49 bytes
`javascript_obj0013_001.js` `b009cdf957d4a584f2943f4a10f29510d69ed6808f84600893b824add885b0be`	pdf-javascript-stream	PDF /JS object 13 at offset 0x379	16010 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 long base64-like blob(s).
`legacy_pdfkit_stage_000.js` `1782665ab6dcede341cc69dab0f1d3df757cb8702009c45e88acada48792788b`	deobfuscated-js	reverse-string concatenation decoded JavaScript at offset 0x379	2043 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 3 eval/decoder/string-building token(s).

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