PDF malware analysis — malicious · 555eb848354a7e27

MALICIOUS

PDF

13.0 KB

MD5: fd5d4e718899afc02c0d85b7b5f52c24 SHA-1: e5f21ded5d1b00088a0095b28438a1fa3fe53a8e SHA-256: 555eb848354a7e27d3273bb677fe6efa9e383e9b69825f269e497b87332b7a98

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, specifically leveraging the 'collab.collectEmailInfo' function associated with CVE-2007-5659. This exploit is designed to execute arbitrary JavaScript, which in this case is likely used to download and execute a secondary payload. The presence of deobfuscated JavaScript files further supports this. The file is classified as malicious by ClamAV with the signature Pdf.Exploit.Agent-36062.

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` `9b52b63087d58f79a0995bc23b8d598ea72d42629f8237dce2e74bf066fbed93`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2F5	12725 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 long base64-like blob(s).
`legacy_pdfkit_stage_001.js` `888c669eab2f5314c1ffaf731acde509c743f8707afae69ca022102d9ddd7cee`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2F5	5260 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).

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