PDF malware analysis — malicious · 42e722a72cd2f1f9

MALICIOUS

PDF

12.7 KB

MD5: d1e1a2753994be8f1d7148e6c1cf2b78 SHA-1: cdfee3ad25eebed6ab7dbfc45f416384b9433fe6 SHA-256: 42e722a72cd2f1f9b2873c19287fd67085b08bdc8f7e3f881b225697b12024a9

138 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The PDF file contains embedded JavaScript, identified by multiple heuristics including PDF_JAVASCRIPT and PDF_JS. A critical heuristic, CVE_2007_5659, specifically points to the use of Collab.collectEmailInfo for JavaScript execution, a known exploit technique. The file was also flagged by ClamAV as Pdf.Exploit.Agent-36062. The embedded JavaScript is likely used to download and execute a second-stage payload.

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` `7ee6b1750d1db60bba8ff31b7a268791638666ed6185d4301a379d7fb570d44d`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2F5	12212 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 long base64-like blob(s).
`legacy_pdfkit_stage_001.js` `d6ef852324efead3ceda723514f8060531d550a9a42d474f922e50a1e678a2e8`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2F5	5122 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).

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