PDF malware analysis — malicious · 20861d019841ae49

MALICIOUS

PDF

12.1 KB

MD5: aa2ba4aed165af3adbbc407bf60e5cbf SHA-1: 3dd35c905770546aa580df0e80b8e39ec1735829 SHA-256: 20861d019841ae490f478573ed9b867182ba8775fd0208b884e7ad134948f74d

138 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The PDF file contains embedded JavaScript, identified by multiple heuristics and ClamAV detection (Pdf.Exploit.Agent-36065). The critical CVE-2007-5659 heuristic indicates the exploitation of a known PDF vulnerability using the 'Collab.collectEmailInfo' method to execute JavaScript. This script is likely designed to download and execute a secondary payload, a common technique for initial access.

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` `101c8f3b1eb9f4e8e73772b085c87c708a43bdafc4ce3ece16fcc6c88ac3b635`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x315	12481 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 long base64-like blob(s).
`legacy_pdfkit_stage_001.js` `dea5d8b12eda5ba2347de94db76fab16dba9fbd58f0f9b119ba4fc34694207ba`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x315	5114 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).

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