PDF malware analysis — malicious · 913f47f78ea2f531

MALICIOUS

PDF

11.8 KB

MD5: e84388847974687e51f7a624aebf3db7 SHA-1: 6fdbcf4033329cffc8ff757541b0c7fa5b0bd5f6 SHA-256: 913f47f78ea2f531c21bb94426ff639cccf58e4dc167c7408d5a0f0ebad84ecd

138 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.001 Malicious Link

The PDF file contains embedded JavaScript, identified by the PDF_JAVASCRIPT and PDF_JS heuristics. The critical CVE_2007_5659 heuristic indicates the exploitation of a known vulnerability (Collab.collectEmailInfo) to execute this JavaScript. The deobfuscated JavaScript files suggest a multi-stage download and execution process, typical of a downloader or initial access exploit. The extracted file names 'legacy_pdfkit_stage_000.js' and 'legacy_pdfkit_stage_001.js' further support this multi-stage nature.

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` `6e515b4268763e030b2bc2d09304f0251a1312834bb3fffef9570ae27e086c7a`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x315	12021 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 long base64-like blob(s).
`legacy_pdfkit_stage_001.js` `2b95609d000dccf77a285679c27cda984ed14fb20419d56300983a27b0c73b8a`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x315	4963 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).

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