PDF malware analysis — malicious · af959f294b467c22

MALICIOUS

PDF

12.5 KB

MD5: f71307635318c59f0302d22930c9a4bb SHA-1: 5f78eef8c06258d615ddda1c8054fe118ad03a75 SHA-256: af959f294b467c222495afbe9db582737e3b6a9bb1923589b2e3035b8360998a

138 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The file is a PDF containing embedded JavaScript, identified by multiple heuristics including PDF_JAVASCRIPT and PDF_JS. Critical firings indicate the exploitation of CVE-2007-5659 via the 'collab.collectEmailInfo' JavaScript function, which is a known method for executing arbitrary code within PDF documents. The ClamAV detection of 'Pdf.Exploit.Agent-36062' further confirms its malicious nature. The embedded JavaScript streams, particularly 'legacy_pdfkit_stage_000.js' and 'legacy_pdfkit_stage_001.js', likely download and execute further stages of a payload, although their specific actions are not fully detailed in the provided evidence.

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` `47a36736af85764c0e2ade45a21490af3e45928b6ff722a65878394afa98d13d`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2F5	12178 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 long base64-like blob(s).
`legacy_pdfkit_stage_001.js` `c618a5d6eb51f9ab85e65a4c708074244d16e339a52fc3e0a2b52dc7575e98f3`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2F5	5056 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).

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