PDF malware analysis — malicious · 7bde6e5848a67a9c

MALICIOUS

PDF

11.7 KB

MD5: b4e35117f462f5ea18687e9d00731657 SHA-1: f52c20f9dd03581d6323bdb145830833ef188a06 SHA-256: 7bde6e5848a67a9c8deb062197b89a174d1328adbe27fa88bc1a56fd8763cd83

138 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 JavaScript/JScript T1204.002 Malicious File

The file is a PDF containing embedded JavaScript, identified by multiple heuristics as malicious. Specifically, the CVE-2007-5659 heuristic indicates the use of a known exploit targeting the Collab.collectEmailInfo function. The embedded JavaScript streams, particularly 'legacy_pdfkit_stage_000.js' and 'legacy_pdfkit_stage_001.js', are likely responsible for executing the exploit and potentially downloading further payloads. The document body is unreadable, but the presence of exploit code and JavaScript strongly suggests a malicious intent.

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` `0cd2f4cf01f775076e45b23292fd8d9e9526946010a49bff4fe544f67a75c235`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x315	11909 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 long base64-like blob(s).
`legacy_pdfkit_stage_001.js` `4c2fe2c533bc08b01e8d06e98e05558d73fbdaaf888cc3e5ece584d2472b9737`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x315	4924 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).

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