PDF malware analysis — malicious · 53a9b7fece40ac18

MALICIOUS

PDF

11.9 KB

MD5: b4439e1e6cef8e72546c5d42d5a11d7c SHA-1: 7edd79fa091cf500ff505e506ec7dbc19e06dd68 SHA-256: 53a9b7fece40ac18dd3ee70a81355fc938bf9c41d0e96a69105d70ff9c3fafb4

138 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.001 Malicious Link

The PDF file contains embedded JavaScript that leverages the 'collab.collectEmailInfo' method, which is known to be vulnerable (CVE-2007-5659). This vulnerability allows for the execution of arbitrary JavaScript. The heuristics indicate that this JavaScript is used to launch further stages, likely downloading and executing additional malware. The presence of deobfuscated JavaScript files suggests a multi-stage attack. The ClamAV detection further confirms 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: 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` `e8b9aba075ae819af7fbf768abe766fa83e790cb765cef4a34a0b486fcf19528`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x315	12221 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 long base64-like blob(s).
`legacy_pdfkit_stage_001.js` `1bdc62a8b6fec25ecfc520660b25c75af66f9e9813ba8de3eb1e62082e8ab239`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x315	5025 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).

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