PDF malware analysis — malicious · b63e8e1dc4c3ff9a

MALICIOUS

PDF

11.8 KB

MD5: d2d2abd2d462b77e664c8eefc85fc2e5 SHA-1: e7a3abc5d0fd9f09c19eab0859b8a3cfe9d99c82 SHA-256: b63e8e1dc4c3ff9a801eed9ea3e3c8d04a8df84721fa58a6fa521650009ae37f

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 CVE-2007-5659, which is known to be used for exploiting PDF vulnerabilities. The extracted JavaScript files, 'legacy_pdfkit_stage_000.js' and 'legacy_pdfkit_stage_001.js', are indicative of a multi-stage exploit chain. The primary function of these scripts appears to be the download and execution of further malicious content, a common technique for delivering second-stage payloads.

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` `f5d7994b5836a4331ffdf04d78e2d84b0f55eaef29a81923100f1d91c12e034f`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x315	12148 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 long base64-like blob(s).
`legacy_pdfkit_stage_001.js` `7296239e16169b8567183c552e72ac605176da0a019840456b806c4999a0b5af`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x315	4960 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).

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