PDF malware analysis — malicious · 8f5cd2b18405b43e

MALICIOUS

PDF

11.8 KB

MD5: 14d18d208aab40d2e9ad3cdfe8baf147 SHA-1: 3d60df1808ec48dae87c6c9676c261456c6f0133 SHA-256: 8f5cd2b18405b43eb0c615608a2216633970aa5cc41f637bce24ad5efbb09fae

138 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The PDF file contains embedded JavaScript, indicated by multiple heuristic firings including 'PDF_JAVASCRIPT' and 'PDF_JS'. The critical 'CVE_2007_5659' heuristic specifically points to the use of 'Collab.collectEmailInfo' for JavaScript execution, a known technique for exploiting PDF vulnerabilities. The presence of deobfuscated JavaScript files ('legacy_pdfkit_stage_000.js', 'legacy_pdfkit_stage_001.js') further supports the execution of malicious code. The exact intent of the JavaScript is not fully discernible due to obfuscation, but its presence and the exploit technique suggest it's designed to download and execute a secondary payload.

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` `9f12e7982e63fb2c3fe5587f2f511289fd351de88a17cacfe17344f7ba777a73`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x315	12145 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 long base64-like blob(s).
`legacy_pdfkit_stage_001.js` `7b7a223d5cdb3e40f63a2651f12ddfa06c05985b2dc6cb989706a3a47135b82f`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x315	4999 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).

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