PDF malware analysis — malicious · b74a86ba63db321f

MALICIOUS

PDF

12.6 KB

MD5: bb85b631756b331f5b941a2bd57c87bf SHA-1: fd6175c0e44a87c6063a574671eae2526ef3c0af SHA-256: b74a86ba63db321f77d7c21af8ee2d4c96a3a118dc5d21b33375879a3d7cc98b

138 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.001 Malicious Link

The PDF file contains embedded JavaScript that exploits the CVE-2007-5659 vulnerability, specifically targeting the Collab.collectEmailInfo function. This JavaScript is likely designed to download and execute a secondary payload, as indicated by the extraction of deobfuscated JavaScript files. The ClamAV detection further confirms its 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` `30b6848dd99f0a7b29637b0722a74a3b3b4b4db1a345c14aa93406e5750ce9c0`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2F5	12174 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 long base64-like blob(s).
`legacy_pdfkit_stage_001.js` `234ee0a00f978159b4257b875874176fcdcb30c6bd4a22d2d007c91adbfe07d3`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2F5	5072 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).

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