PDF malware analysis — malicious · 90f51ef008feaf1a

MALICIOUS

PDF

12.4 KB

MD5: b60988448046c74c9e5db7112b5654b2 SHA-1: 5bcd0bee7130b18c45eaf33ea60d0f35e1945fb5 SHA-256: 90f51ef008feaf1aabe60d2c0ba652c5605e2789808958c5b552d62e7f7579e8

138 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.001 Malicious Link

The PDF file contains embedded JavaScript, identified by the CVE_2007_5659 heuristic which specifically flags the use of 'Collab.collectEmailInfo' for JavaScript execution. This technique is commonly used to exploit vulnerabilities in PDF readers. The extracted JavaScript streams, 'legacy_pdfkit_stage_000.js' and 'legacy_pdfkit_stage_001.js', suggest a multi-stage exploit. The primary function appears to be the exploitation of CVE-2007-5659, likely to download and execute a secondary 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: Pdf.Exploit.Agent-36062 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Exploit.Agent-36062
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` `068944f8c011a88ab770b45c6de142b9305a1f515d410204d5eadd9ac2b5bfb3`	pdf-javascript-stream	PDF /JS object 7 at offset 0x19B	373 bytes
`legacy_pdfkit_stage_000.js` `2278af34f79f6f505888c7267325fb672c6b948d40fb54fc7fa1619b700bb7a1`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2F5	12097 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 long base64-like blob(s).
`legacy_pdfkit_stage_001.js` `4ce6398c8aceb7ce9c19b1fa847108f7d15ffd12873a93d50c5a9cdb18c43e13`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2F5	4992 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).

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