PDF malware analysis — malicious · c40c49262d98ca44

MALICIOUS

PDF

11.6 KB

MD5: e9d02c314b13402750da8e162432e95d SHA-1: d0a2ebf3976cdba660c23f62d46c87835983fb8e SHA-256: c40c49262d98ca441ceb5539de97042800c7a77a92ed970fa97a15ad0788d340

138 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.001 Malicious Link

The PDF file contains embedded JavaScript, specifically leveraging the 'Collab.collectEmailInfo' function, which is known to be vulnerable (CVE-2007-5659). This indicates an attempt to exploit a PDF reader vulnerability to execute arbitrary code. The extracted JavaScript files, legacy_pdfkit_stage_000.js and legacy_pdfkit_stage_001.js, likely contain the malicious payload, although their specific actions are not detailed here. The ClamAV detection further confirms the malicious nature of the file.

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` `43275110a9ef3f61b9befa34a7cd09f2d1c95b3364109de4e9dbe4d8c099a546`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x315	11709 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 long base64-like blob(s).
`legacy_pdfkit_stage_001.js` `ed36a8cf091a0695fd1070034c7aea40d10a489dd4995abb7ebd71339f8914dd`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x315	4830 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).

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