PDF / .TXT malware analysis — malicious · 398a6aa193485d95

MALICIOUS

PDF / .TXT

13.5 KB

MD5: babc38085b8eb7da61fb7e1da5cc90f5 SHA-1: a8157c1cde2b96a6761e0ae751c0c88df9263a89 SHA-256: 398a6aa193485d95bee279d779b8b5385b98261dfee45077d9125839a04b565d

138 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 JavaScript/Shell Script Execution T1204.002 Malicious File Execution: User Execution: Malicious File

The file is a PDF containing embedded JavaScript, identified as malicious by ClamAV and triggering critical heuristics related to CVE-2007-5659. The JavaScript is deobfuscated into multiple stages, suggesting it's designed to download and execute further malicious content. The exploit targets a known vulnerability in PDF readers.

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-36064 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Exploit.Agent-36064
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` `a5c8f0f722df4dd9876a0087e1eee65bd3020c5995f94f6729f7e17f3f3677a0`	pdf-javascript-stream	PDF /JS object 7 at offset 0x19D	331 bytes
`legacy_pdfkit_stage_000.js` `0c98b2a833479ab818ece04f14eacded4fb41fd4570df5203be54173345685fe`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2F2	12563 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 long base64-like blob(s).
`legacy_pdfkit_stage_001.js` `95a00d3dcc92a580299bb365dbc02d7acea124e6fdea53d4f5277f613def6d17`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2F2	5287 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).

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