PDF malware analysis — malicious · c7c08406c35e79c7

MALICIOUS

PDF

11.6 KB

MD5: a9b6a3a9369b7fc694567e6cea75d8ed SHA-1: b05ae6af6c8aa35d9a05d56f80f887305191676e SHA-256: c7c08406c35e79c799ffa67197cc5fcb7a738c8af5c6018bf5ed2ae7a1f34bb0

138 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The PDF file contains embedded JavaScript, identified by multiple heuristics including PDF_JAVASCRIPT and PDF_JS. The critical CVE-2007-5659 heuristic indicates the exploitation of a known vulnerability using JavaScript. The deobfuscated JavaScript files, legacy_pdfkit_stage_000.js and legacy_pdfkit_stage_001.js, were extracted and likely contain the malicious payload. The ClamAV detection further confirms its malicious nature. The exact intent of the script is not fully clear due to obfuscation, but it is designed to exploit a PDF vulnerability.

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` `58689314373f50eb420b0c9a3a87457aa4bcb727c1fab2b20d3e2a19a502ce96`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x315	11907 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 long base64-like blob(s).
`legacy_pdfkit_stage_001.js` `c8893c22d4955db2bba31236faa0c50ff8f08bfda5d0636ea22ecc863b125461`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x315	4896 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).

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