PDF malware analysis — malicious · d7379e06ec007ff3

MALICIOUS

PDF

12.1 KB

MD5: 2f81ba8581eec228bea875ea0c116673 SHA-1: 86fe10a04ad50f88a16b06b20782abf410d873ce SHA-256: d7379e06ec007ff3230dd50bddfbe4956042c334acf7148deb19c356b6853e6a

138 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell 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 points to the exploitation of a vulnerability using JavaScript that is concatenated and evaluated. This JavaScript is further evidenced by the extraction of two deobfuscated JS files, 'legacy_pdfkit_stage_000.js' and 'legacy_pdfkit_stage_001.js'. The ClamAV detection 'Pdf.Exploit.Agent-36062' confirms the malicious nature. The embedded JavaScript likely downloads and executes a second-stage payload, leveraging the CVE-2007-5659 vulnerability.

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` `093614b65de77bcf58544c1255e1449bbe7184a407f19121de41641920f9fd81`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2F5	11801 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 long base64-like blob(s).
`legacy_pdfkit_stage_001.js` `b3c445a30cee0b6c8803ab032f45735042a3591670217fbbcf5114d22c0548e9`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2F5	4828 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).

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