PDF malware analysis — malicious · c83ff689db5bfcd3

MALICIOUS

PDF

11.7 KB

MD5: 9b160ff9e0e5a6a51aeed58d67f36018 SHA-1: dff752baf474adf5bdad8859c9ad9dfbc833df88 SHA-256: c83ff689db5bfcd3ed3fb14ecf38e73c482bc640e3c20e608c388052f62001a9

138 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.001 Malicious Link T1204.002 Malicious File

The critical heuristic CVE_2007_5659 indicates the exploitation of a PDF vulnerability using JavaScript. The presence of embedded JavaScript streams and deobfuscated JS files further supports this. The ClamAV detection of 'Pdf.Exploit.Agent-36065' confirms its malicious nature. The embedded JavaScript is likely designed to download and execute a second-stage 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` `4cba30649174ea62883cab2079e32c4e3d844beeb08728a2f59e4f7129c4805f`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x315	12047 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 long base64-like blob(s).
`legacy_pdfkit_stage_001.js` `a580f9b3ab8279a53c1e1f5ec88e226af4fced182aa70d842d4ccb60c023a431`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x315	4933 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).

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