PDF malware analysis — malicious · 541a508a01e281a4

MALICIOUS

PDF

12.1 KB

MD5: fd35ab4cf564ee88a70e5ac297fe6b90 SHA-1: 7ca912ff5775d559f8612e9e5c2c710d007da166 SHA-256: 541a508a01e281a490c990f21d1c6b5ed572ad46d21daa26f5f0537437d13690

138 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.001 Malicious Link

The PDF file contains embedded JavaScript, identified by multiple heuristics including PDF_JAVASCRIPT and PDF_JS. The critical CVE_2007_5659 heuristic indicates the use of a known exploit targeting the `collab.collectEmailInfo` method, which is often used to execute arbitrary JavaScript. The extracted JavaScript streams, particularly `legacy_pdfkit_stage_000.js`, suggest the script is designed to download and execute a secondary payload. The ClamAV detection further confirms its malicious nature.

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` `3b7c33fbe95e00748ee68a490411345a467a63ece048cb38fe53a32812bce87b`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x315	12698 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 long base64-like blob(s).
`legacy_pdfkit_stage_001.js` `03cd878188e3885dc37badcc43ef3719ff2494bf37e4a397bec31ad943e68aca`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x315	5214 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).

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