PDF malware analysis — malicious · 9f1ca5914ae7d5e5

MALICIOUS

PDF

12.3 KB

MD5: 1c8a29b1b780f139621ea59986802b49 SHA-1: 62c815f9ccbdc606ec276cac659edf893b353b94 SHA-256: 9f1ca5914ae7d5e5380a6a57bbde7a52578f59a24315be75d99d2444930f7eb1

138 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The file is a PDF containing embedded JavaScript, flagged by multiple heuristics including a critical detection for CVE-2007-5659. The JavaScript is further processed into two deobfuscated JS files, legacy_pdfkit_stage_000.js and legacy_pdfkit_stage_001.js. This indicates the sample is designed to exploit the CVE-2007-5659 vulnerability via JavaScript execution, a common technique for delivering further malware 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-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` `af089d96d674eabfb002373d9e0b3437bf7ac406b5bf41762ee4ec66d5c338af`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2F5	11962 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 long base64-like blob(s).
`legacy_pdfkit_stage_001.js` `4f393ed0230c965e2416e0c9c6b5097ee96ff3a1f784f8cf804b0f3754ea41a7`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2F5	4983 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).

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