PDF malware analysis — malicious · b24210f737a13649

MALICIOUS

PDF

12.7 KB

MD5: 1f564c6ce65f8801cfc5cf0bfcaabddc SHA-1: 1ffe084ea9e1c51b4c7a4c09a149e572e1f758aa SHA-256: b24210f737a1364970b4bff1a65acbb3eb0676f1de7763b86220c7f3f612a6d3

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' firing specifically points to the use of the 'Collab.collectEmailInfo' JavaScript function, a known method for exploiting PDF vulnerabilities. This function is used to construct and execute JavaScript, likely to download and execute a second-stage payload. The presence of deobfuscated JavaScript files further supports this. The ClamAV detection 'Pdf.Exploit.Agent-36062' confirms the malicious nature.

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` `a34cdb39fda16812b9d8810baebe67ab6af15b13c70c853477c0ec3b8eef7e5d`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2F5	12456 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 long base64-like blob(s).
`legacy_pdfkit_stage_001.js` `3077fe5ac80d3a0f19f545b5feb67c170b21ee9e055d3c32b35892e31a8a0c0c`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2F5	5198 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).

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