PDF malware analysis — malicious · b7edb3e68f02099c

MALICIOUS

PDF

12.4 KB

MD5: a3136cee940fdfdda90b58581204b8e9 SHA-1: b4e4d514d4190304cbe8ea3b33c43564652d4b35 SHA-256: b7edb3e68f02099c57b7ddcc0ad7345a7969dc66d30afe8a834abc63bfc32cab

138 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 JavaScript T1204.001 Malicious Link or Macro: Malicious Link T1204.002 Malicious Link or Macro: Malicious Macro

The file is a PDF containing embedded JavaScript, identified by multiple heuristics including a critical alert for CVE-2007-5659. This exploit targets the 'Collab.collectEmailInfo' method. The analysis also revealed deobfuscated JavaScript files, suggesting a multi-stage attack. The primary function of the embedded scripts appears to be the exploitation of this vulnerability to download and execute further malicious content.

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` `14141228a2d2676462c21d590358d5c62e5cd3ea31207798aedcdd28598bf3a5`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2F5	12114 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 long base64-like blob(s).
`legacy_pdfkit_stage_001.js` `d1f9e29f2a11b06e865692aca40a226b25c06b04482b7bb76f5c134fb9e2e767`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2F5	4971 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).

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