PDF malware analysis — malicious · 3b8aa5a6af6f02f6

MALICIOUS

PDF

13.1 KB

MD5: 081fc7a79891c9453ad9a9d3bac77a92 SHA-1: 3f1c58b15456c9ebff24a8fcea86263f3adfedc9 SHA-256: 3b8aa5a6af6f02f65b5fb3427b9c748ac416538b57eea7b6446cfa6f1a0802e4

138 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.001 Malicious Link

The file is a PDF containing embedded JavaScript, identified by multiple heuristics including CVE-2007-5659 which specifically targets the 'Collab.collectEmailInfo' JavaScript object used for exploitation. The extracted JavaScript files, 'legacy_pdfkit_stage_000.js' and 'legacy_pdfkit_stage_001.js', are indicative of a multi-stage exploit chain. The primary intent appears to be the execution of arbitrary code via the JavaScript engine within the PDF viewer, likely 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` `c1c29d28391fd8f965ec431e0941a1720c5bea784efb2500bac564cb5dcdcf24`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2F5	12774 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 long base64-like blob(s).
`legacy_pdfkit_stage_001.js` `604de77bdb297820f85785a709c6fb27e7978cf3ff022f9ed9529ff1382f0171`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2F5	5304 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).

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