PDF malware analysis — malicious · faf1ffa86043a68a

MALICIOUS

PDF

11.8 KB

MD5: f43ef671eb1b5635a5c9aa354ca7a914 SHA-1: 42777416a67d2153c8155606f93e36a9726b340a SHA-256: faf1ffa86043a68adb70904b89bf5c5123ca080d517a30f5b40988cce300eae3

138 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.001 Malicious Link T1204.002 Malicious File

The PDF file contains embedded JavaScript, identified by multiple heuristics as malicious. Specifically, the 'CVE_2007_5659' heuristic indicates the use of the Collab.collectEmailInfo JavaScript function, a known method for exploiting Adobe Reader vulnerabilities. The extracted JavaScript streams, 'legacy_pdfkit_stage_000.js' and 'legacy_pdfkit_stage_001.js', suggest a multi-stage download and execution process. The primary intent appears to be the exploitation of a PDF reader vulnerability to facilitate the download and execution of further malicious content.

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` `c0db9e2f51ea5aa7cfed39e0e19c34c51b60ccd68b7825aa063a32e5262eadaa`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x315	12023 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 long base64-like blob(s).
`legacy_pdfkit_stage_001.js` `29155323d4f9eba21cadd8d0f76d0816b9265a9188938a1eb3e43a2c8bc9b4b8`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x315	4941 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).

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