PDF malware analysis — malicious · 3783521a4acf3b7a

MALICIOUS

PDF

11.9 KB

MD5: deef3e8091f7d3194c71176526247c7a SHA-1: c7bf74407d1b9e0e73f8191088703e2205eab591 SHA-256: 3783521a4acf3b7a1a015abadb4ab17f679e1328085e5a30e260245bcfbfdecb

138 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.001 Malicious Link

The PDF file contains obfuscated JavaScript, identified by the CVE-2007-5659 heuristic, which is designed to exploit a vulnerability in older versions of Adobe Reader. The embedded JavaScript streams, legacy_pdfkit_stage_000.js and legacy_pdfkit_stage_001.js, likely contain the second-stage payload. The ClamAV detection for Heuristics.PDF.ObfuscatedNameObject further supports the malicious nature of the file.

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` `05404f55137964e0da4e336a346cdacfa45b60dbfa0af9388dfd7f80447d3ee6`	deobfuscated-js	z-percent hex-pair decoded JavaScript at offset 0x2E9	5111 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` `abde6eb0f722070821b22ecd766df45ad74879618a7df0f8fba62432ee660781`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2E9	12239 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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