PDF malware analysis — malicious · ae0e7c8f411d2ed1

MALICIOUS

PDF

11.8 KB

MD5: dc5045df4593a8e7f80f6302eb1b40eb SHA-1: 7c81a8f6943878b7e235ced34ebf74f9f36b55a8 SHA-256: ae0e7c8f411d2ed1f907b8408710db3f2d49678d743010c4d506a5c1a6faea68

138 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.001 Malicious Link

The PDF file contains embedded JavaScript, identified by the PDF_JAVASCRIPT and PDF_JS heuristics. The critical CVE_2007_5659 heuristic indicates the use of a known vulnerability (Collab.collectEmailInfo) to trigger the execution of this JavaScript. The extracted artifacts legacy_pdfkit_stage_000.js and legacy_pdfkit_stage_001.js are deobfuscated JavaScript streams, suggesting they are part of a multi-stage attack. The likely intent is to download and execute a second-stage payload.

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` `b5ebc534effa9e90170e96b13a242a9c325407df7f01f0fce295c3c9997a96de`	deobfuscated-js	z-percent hex-pair decoded JavaScript at offset 0x2E9	5007 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` `076a6daf6cb87430db0a5ba733aa4e5544173c3a34b831473c62b60d5150d05e`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2E9	12014 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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