PDF malware analysis — malicious · afd59f8e14458264

MALICIOUS

PDF

12.3 KB

MD5: afc046cd5b1519bcee2f96b510dafa2e SHA-1: d6006d37561ad219712fc6a07ebe9aeb50788d30 SHA-256: afd59f8e144582642931734cdfe449aec44754ccb67f3c9193dc1645c1f67deb

138 Risk Score

Malware Insights

MITRE ATT&CK

T1204.002 Malicious File Execution: Malicious File

This PDF file contains embedded JavaScript that exploits CVE-2007-5659, a vulnerability in Adobe Reader related to the Collab.collectEmailInfo function. The JavaScript is deobfuscated into two files, legacy_pdfkit_stage_000.js and legacy_pdfkit_stage_001.js. The primary purpose of the script is to download and execute a second-stage payload, as indicated by the heuristic firings and the nature of the extracted JavaScript files.

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` `bf6aa7bbac7e78be1b4ee15429eedeacc29c7b12d0630a9a518a0a0f2d1a8d92`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x315	12683 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 long base64-like blob(s).
`legacy_pdfkit_stage_001.js` `8f1dd9f819cf40612aff2512de94a71c6918b6fa445f022b9a2b0e3c9076769a`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x315	5293 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).

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