PDF malware analysis — malicious · ba520ebfc59229c3

MALICIOUS

PDF

12.3 KB

MD5: 003740933ea94789bc1f55f0dcc55232 SHA-1: e5d63fd4f03c0de113bf7d394f1915bdc14c48be SHA-256: ba520ebfc59229c3917f6c50e8bd02c266268382eed39a345e09deb2380ddeca

138 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.001 Malicious Link T1204.002 Malicious File

The PDF file contains embedded JavaScript, identified by multiple heuristics including PDF_JAVASCRIPT and PDF_JS. A critical heuristic, CVE_2007_5659, specifically indicates the use of JavaScript via the Collab.collectEmailInfo method, which is known to be used for exploiting PDF vulnerabilities. The extracted JavaScript streams, legacy_pdfkit_stage_000.js and legacy_pdfkit_stage_001.js, are likely responsible for executing the exploit and potentially downloading further malicious content. 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-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` `f0610988bcfe92a07eb5b563fcbf7bf587d91908b844cb8b945483866653334b`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2F5	12152 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 long base64-like blob(s).
`legacy_pdfkit_stage_001.js` `28cd41e6043a3d4f58a3faba70a08c95e6d0dccd0049a396b6a4268a1f459876`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2F5	5038 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).

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