PDF / .TXT malware analysis — malicious · 89846c450b56c24e

MALICIOUS

PDF / .TXT

11.8 KB

MD5: 281f68a0bde7a1a51a3c5f517bd97268 SHA-1: 12c4f0754fff6fa319825653a55de8fd171d91ba SHA-256: 89846c450b56c24edcf47aa3cfd683bdbf40ecb3c5a9a5ecfa2de6e30d302b49

138 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.001 Malicious Link

The PDF file contains embedded JavaScript that exploits CVE-2007-5659, specifically targeting the Collab.collectEmailInfo function. The heuristics indicate obfuscated JavaScript and the extraction of two JS files, legacy_pdfkit_stage_000.js and legacy_pdfkit_stage_001.js. This suggests the primary function of the PDF is to act as a dropper for further malicious code, likely downloaded and executed by the embedded scripts.

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: Heuristics.PDF.ObfuscatedNameObject critical CLAMAV_DETECTION

ClamAV detected this file as malware: Heuristics.PDF.ObfuscatedNameObject
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` `6f60a1053baafdc578f85eae84a2dc6d16775fbd66240d82cbfb7b4f4ff4e90a`	pdf-javascript-stream	PDF /JS object 7 at offset 0x19D	295 bytes
`legacy_pdfkit_stage_000.js` `cf97b547db58afd0dbdb96702cba945e5dc44f82c74fb6d8d1fb9c24d9f7cb6d`	deobfuscated-js	z-percent hex-pair decoded JavaScript at offset 0x2E9	4989 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).
`legacy_pdfkit_stage_001.js` `1b0d347949431346d84ad431a5e452639354b28ffc70af4d08684c102f3f5555`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2E9	11977 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s). Carved artifact contains 1 long base64-like blob(s).

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