PDF malware analysis — malicious · 8b588ab9e01a9c6b

MALICIOUS

PDF

12.0 KB

MD5: b8e48a032775f94e7ce878dc330a2e74 SHA-1: 5f05d7265a19166b795d7e9aa49b1e22efc4c5a2 SHA-256: 8b588ab9e01a9c6b8807f6efe9e39cba76703297b488625014c1d42e77015868

138 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.001 Malicious Link

The PDF file contains embedded JavaScript, identified by the CVE_2007_5659 heuristic which specifically mentions the 'Collab.collectEmailInfo' JavaScript function used in exploits. This function is known to be used to launch arbitrary code execution. The presence of deobfuscated JavaScript files further indicates malicious scripting. The primary attack vector appears to be exploiting a vulnerability within the PDF reader to execute this script, which likely leads to the download and execution of a secondary payload.

Heuristics 5

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)
ClamAV: Pdf.Exploit.Agent-36065 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Exploit.Agent-36065
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_obj0007_000.js` `9c67560e8c63b720885d3efc1627b844b86a6ec08e99e5b65a22eae832045756`	pdf-javascript-stream	PDF /JS object 7 at offset 0x19C	431 bytes
`legacy_pdfkit_stage_000.js` `6cdc175715bb4b3cd6b2919c89ba7bcf1b9acbbe446ca429258865fd43ba15ba`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x315	12207 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 long base64-like blob(s).
`legacy_pdfkit_stage_001.js` `f4cfff4c5efc44907ac88962fa9600f2af41e5db473f24af161c433326460d47`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x315	5051 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).

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