PDF malware analysis — malicious · d266e3d85c4a29a5

MALICIOUS

PDF

11.8 KB

MD5: 3826028e81cc5660aae986ea37241c38 SHA-1: 0a4011aa895e80ecc7157ef5ad104bd884d18913 SHA-256: d266e3d85c4a29a5595a557caef8e30855cbf42ccd926ac867bf4ab462b6a3dc

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 mentions the use of Collab.collectEmailInfo to execute JavaScript, which is then concatenated and evaluated. This suggests the file is designed to exploit this vulnerability to deliver a malicious payload. The presence of deobfuscated JavaScript files further supports this. The exact nature of the payload is not clear from the provided evidence, but the exploit mechanism is evident.

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` `0ced74dd7ff548b052d17021597ea8f80ee431df81da8bc6980aae3d9abafe5c`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x315	12006 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 long base64-like blob(s).
`legacy_pdfkit_stage_001.js` `22bb844b3ce34e8e0e4681ca4ada6356a2b7c201acc598c718255568d149a955`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x315	4967 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).

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