PDF malware analysis — malicious · 88d9b434bf26cf76

MALICIOUS

PDF

12.7 KB

MD5: 194d25a1e0b370ffe18bd5377a501f09 SHA-1: d53d8b93223cc46ccf56c00c9bf6aa5d36f03a44 SHA-256: 88d9b434bf26cf76cb35e323da2efa74a54ab19a872cb7a53062b0aed4d50cd5

138 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 JavaScript/JScript T1204.001 Malicious Link/URL T1204.002 Malicious File

The PDF file contains embedded JavaScript that exploits the CVE-2007-5659 vulnerability. The critical heuristic firings indicate the use of JavaScript for exploitation, and the extracted file names 'legacy_pdfkit_stage_000.js' and 'legacy_pdfkit_stage_001.js' suggest a multi-stage process. This pattern is commonly used 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` `21cdd0ac5ae19d49fe2e37c3c56163d280791f1d74e345f6322a2309617346a0`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2F5	12431 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 long base64-like blob(s).
`legacy_pdfkit_stage_001.js` `f80cc6431e7a8f0c1f5a7b491738fd2578bc6df4368bac78afa00923b9a36b89`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2F5	5119 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).

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