PDF malware analysis — malicious · 2e148d0d52357be7

MALICIOUS

PDF

12.7 KB

MD5: ffbb48ddbee866fed3bc8eafea97c5e6 SHA-1: 936fb24c002bb1f79d73187c8ca7a7c126292fdf SHA-256: 2e148d0d52357be7412d38c1f0dae22c01defe04e0072058a0de28d0f85f2b96

138 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The PDF file contains embedded JavaScript, identified by the PDF_JAVASCRIPT and PDF_JS heuristics. The critical CVE_2007_5659 heuristic indicates the use of the Collab.collectEmailInfo JavaScript function, a known method for exploiting PDF vulnerabilities. This function is used to concatenate information fields and evaluate the result, suggesting the script's purpose is to download and execute a secondary payload. The presence of deobfuscated JavaScript files further supports this. The ClamAV detection also 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-36062 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Exploit.Agent-36062
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` `068944f8c011a88ab770b45c6de142b9305a1f515d410204d5eadd9ac2b5bfb3`	pdf-javascript-stream	PDF /JS object 7 at offset 0x19B	373 bytes
`legacy_pdfkit_stage_000.js` `e2fc972a9513e115933df60dfa569388fe45b0acf6c09945d46d62a0fd40d272`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2F5	12516 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 long base64-like blob(s).
`legacy_pdfkit_stage_001.js` `c33dad34af613e6def3102d920f5eb0d0cf99cccfd6f32f7f45a32584a769a59`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2F5	5183 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).

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