PDF malware analysis — malicious · 969b8adf9d455d7a

MALICIOUS

PDF

11.7 KB

MD5: c924ed04bef443889d8a25b64009739b SHA-1: 71c75b1ac346bb798ffe4a319a7cee0a8511f49d SHA-256: 969b8adf9d455d7a51f7f65469def1ec4ebaab5410909765177cb3bd9f901cc6

138 Risk Score

Malware Insights

MITRE ATT&CK

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

The PDF file contains embedded JavaScript, specifically leveraging the 'Collab.collectEmailInfo' function, which is known to be exploitable via CVE-2007-5659. This indicates an attempt to execute arbitrary code. The presence of deobfuscated JavaScript files 'legacy_pdfkit_stage_000.js' and 'legacy_pdfkit_stage_001.js' further supports the execution of malicious scripts. The primary attack vector appears to be exploiting a PDF reader vulnerability to download and execute further stages.

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` `2bb1ce75c8d4b62b24faa046706787f5d91f09c994dd7da87564255cfa4a9cf8`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x315	12056 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 long base64-like blob(s).
`legacy_pdfkit_stage_001.js` `6e56281d17d8972871753002d92791cf31437ea94689c53e9c589b8446ddf2dd`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x315	4967 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).

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