PDF malware analysis — malicious · 99abda516fe98bf3

MALICIOUS

PDF

11.9 KB

MD5: b943beda881ef403a4383defe781234c SHA-1: 6ed50402f16daa5c02007930e5a048e89fdcbc3f SHA-256: 99abda516fe98bf34feb722727063032a59f8f58e4b96a15f50c9371e73608c8

138 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 JavaScript/JScript T1204.002 Malicious File

The critical heuristic CVE_2007_5659 indicates the exploitation of a vulnerability in PDF files using JavaScript. The embedded JavaScript streams, particularly legacy_pdfkit_stage_000.js and legacy_pdfkit_stage_001.js, are likely responsible for executing malicious code. The ClamAV detection further confirms the malicious nature of the file. The exact payload or C2 infrastructure is not directly discernible from the provided static analysis, but the pattern suggests a downloader or exploit dropper.

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` `ede0cb986f9a3a93b7e626debbc16e5dfa19f19f373cbd1a4b6ce51825e3a9cb`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x315	12298 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 long base64-like blob(s).
`legacy_pdfkit_stage_001.js` `1f0d55a5f3ac73b7688c17480f0e07bb2d443bf59f0746bba48b1d71bb3a5fe1`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x315	5065 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).

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