PDF malware analysis — malicious · f7d9041e4ff87596

MALICIOUS

PDF

12.5 KB

MD5: bca96f43eb6afbc8f581ee138def4e52 SHA-1: 6edd5f4504cceb4142bfd793f9b79886706c7ecf SHA-256: f7d9041e4ff87596432308ea4e88d9ec233cfc3ec9de6ece64073d74b94c9854

138 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The PDF file contains embedded JavaScript, identified by the CVE-2007-5659 heuristic, which is known to exploit a vulnerability in PDF readers. The extracted JavaScript files, 'legacy_pdfkit_stage_000.js' and 'legacy_pdfkit_stage_001.js', suggest a multi-stage exploit. The primary function of the embedded script appears to be the execution of further malicious code, likely a downloader for a second-stage payload. The ClamAV detection further supports 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` `138887c698c9d63d786dfc900572e6bcb8574af8740db984a1297aad1508547a`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2F5	12121 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 long base64-like blob(s).
`legacy_pdfkit_stage_001.js` `95408e70ca4d85e4283565ea8b5c6ea4d3d8cbc9d41c022de8f7ad851334af0d`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2F5	5008 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).

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