PDF malware analysis — malicious · 1b188efbb1484a86

MALICIOUS

PDF

11.6 KB

MD5: 275ae72063f84a663ffe12e2bc158b10 SHA-1: a99e85db73a45634c3fae526c9f667401d62c60e SHA-256: 1b188efbb1484a865cb1b499000b9da0bacff469f23e08dff1f8b45219f84a15

138 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 JavaScript/JScript T1204.002 Malicious File

The PDF file contains embedded JavaScript, as indicated by multiple heuristic firings including 'PDF_JAVASCRIPT' and 'PDF_JS'. The critical 'CVE_2007_5659' heuristic specifically points to the exploitation of a known vulnerability using the 'Collab.collectEmailInfo' JavaScript function. This function is used to concatenate and evaluate JavaScript, suggesting the execution of a malicious payload. The presence of deobfuscated JavaScript files further supports this. The file is detected by ClamAV as 'Pdf.Exploit.Agent-36065'.

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` `8f0a7297c4d876f9ae8ba96d7babe37be5df3a0babf1e0057d17bd2c8ec6c4dd`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x315	11925 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 long base64-like blob(s).
`legacy_pdfkit_stage_001.js` `6ce4fa307f241f721337d9de84313f19701aabaa81bf37124fb621ba68f0e0c8`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x315	4880 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).

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