PDF malware analysis — malicious · 3a9b31b6e84f84e0

MALICIOUS

PDF

12.3 KB

MD5: fe464a45caab06aae01e87812fc882ba SHA-1: 335ffb10cfb3843318ff42ed5ce9bea31793633e SHA-256: 3a9b31b6e84f84e02d11997b74cbd9d26541ea223196d4611c9c313dcc87b7cc

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 the 'collab.collectEmailInfo' JavaScript function, which is known to be used in PDF exploits. This function is likely used to download and execute a second-stage payload. The presence of deobfuscated JavaScript files further supports the exploitation of embedded scripts. The ClamAV detection also confirms the malicious nature of the file.

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` `9b0d33ed7e5d1e736be99f21ca1f0555ed09932013b87eac0fb27d7fdfda4749`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2F5	11983 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 long base64-like blob(s).
`legacy_pdfkit_stage_001.js` `c3597ef382115e35ba4a8f24cffee3e11dbb67c27ad994b04b496dce9574c92c`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2F5	4925 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).

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