PDF malware analysis — malicious · 4cde5705c38c9f72

MALICIOUS

PDF

12.4 KB

MD5: 38d2cdd119e6140d912bd6787ffb2aa0 SHA-1: f0a97983e2b31c32f8f0a22ebcbbc3390f58efa2 SHA-256: 4cde5705c38c9f72f700e51d4d38f66a66f6565e4a34bb1b88444d7e6ac6b9b4

138 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 JavaScript T1204.002 Malicious JavaScript

The PDF file contains embedded JavaScript, specifically identified as exploiting CVE-2007-5659 via the 'collab.collectEmailInfo' function. This JavaScript is likely used to download and execute a secondary payload. The presence of deobfuscated JavaScript files further supports this. The exact nature of the secondary payload is not discernible from the provided evidence.

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` `4a7c8f49f63aaa4a1e993db79027dfd54302b4d7db906eff8ac72d9f1f61ddf0`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x315	12878 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 long base64-like blob(s).
`legacy_pdfkit_stage_001.js` `1ca8ff74f1fa76dda1ba49700811563c00b90c3134f66d5a42ce70c39ae6cabd`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x315	5322 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).

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