PDF malware analysis — malicious · cbf8a72a827a2574

MALICIOUS

PDF

11.8 KB

MD5: d242450947322f6015e1eca8b7d08bf9 SHA-1: 07366c571e7306c23f751232dadccb86b4ce5cd1 SHA-256: cbf8a72a827a257452591657b7216203e2ba50bb17548f88bac776b528c22860

138 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The file is a PDF containing embedded JavaScript, identified as malicious by ClamAV with the signature Pdf.Exploit.Agent-36065. Critical heuristics indicate the exploitation of CVE-2007-5659 via the Collab.collectEmailInfo JavaScript method, which is designed to concatenate and evaluate strings. The presence of deobfuscated JavaScript files suggests the script's purpose is to download and execute further malicious content.

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` `15a2d4fd81d01de0a44ff8021992b7d05899a48f7043dedc0881b2e9c6ed8365`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x315	12198 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 long base64-like blob(s).
`legacy_pdfkit_stage_001.js` `9f2fecfdfeec64809a811a2cfafcec7a4822c7aeed14d88dc921c7a0b62db60f`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x315	4991 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).

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