PDF malware analysis — malicious · b8a07c5e5cafcbbd

MALICIOUS

PDF

11.7 KB

MD5: 1f75a7da0327cd5f6af11563caf06ca8 SHA-1: 2b5cf00ebd7d5fa753ee85f370ae4145820d8bdb SHA-256: b8a07c5e5cafcbbd1349c709ad40c7fb3627e4740c11fd9414c771b764b74dd4

138 Risk Score

Malware Insights

MITRE ATT&CK

T1204.002 Malicious File T1059.001 JavaScript

The PDF file contains embedded JavaScript, identified by multiple heuristics including PDF_JAVASCRIPT and PDF_JS. The critical CVE_2007_5659 heuristic indicates the exploitation of a specific vulnerability using JavaScript that is constructed by concatenating info fields and extracting characters at a fixed stride. This suggests the script is designed to download and execute a second-stage payload. The ClamAV detection further confirms its malicious nature. No specific family could be identified, but the attack pattern is consistent with a PDF-based exploit kit.

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` `60514252f8d992b185654f6e8ac45ab3b99a32747f48863d89aede287308ef58`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x315	12050 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 long base64-like blob(s).
`legacy_pdfkit_stage_001.js` `1fe8d2f78d647993731ed2b414f7c927380d13fae3c8d35e4caa0cb4ae745cc3`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x315	4993 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).

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