PDF malware analysis — malicious · b16cfc606d349390

MALICIOUS

PDF

12.5 KB

MD5: f93545f00add3a6908fc0c7d46b254d0 SHA-1: 7073f55f62c4fd98fbbd188b1435bd9f38e3d352 SHA-256: b16cfc606d349390ce90ccac7c79d1248cb6fa3569a8060aa6d157ce74f3ead6

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 use of a known exploit technique involving the `Collab.collectEmailInfo` JavaScript function to execute arbitrary code. Two deobfuscated JavaScript files were extracted, suggesting a multi-stage attack. The primary intent appears to be the execution of this JavaScript, likely to download and run a second-stage payload, as indicated by the ClamAV detection of Pdf.Exploit.Agent-36065.

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` `70f7b3166aca19285132686d0042a421de41e2479e1542d048aad2e2da847773`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x315	12820 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 long base64-like blob(s).
`legacy_pdfkit_stage_001.js` `c4996f9afcfd329279459f46e317809e8d51295be0a2f82fd4e72b7f7d2d466f`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x315	5312 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).

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