PDF malware analysis — malicious · 21b874a2cd465fcb

MALICIOUS

PDF

11.6 KB

MD5: bf2f9c08db29f89c0ad1de2082d447d6 SHA-1: 183e8ccacc31f0f11bff0fd9376e36eeaac49ffa SHA-256: 21b874a2cd465fcb950816dcdecc8af3a97ddc24178285305697cc9fa6e4691e

138 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The PDF file contains embedded JavaScript that leverages the CVE-2007-5659 vulnerability through the 'collab.collectEmailInfo' method. This technique is commonly used to download and execute further malicious payloads. The presence of deobfuscated JavaScript files and ClamAV detection as 'Pdf.Exploit.Agent-36065' strongly indicates malicious intent.

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` `02f4c5b8def32a397d63ba3c377a7c2eec5e6d98e1965a3e837dcbf9fc5534df`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x315	11913 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 long base64-like blob(s).
`legacy_pdfkit_stage_001.js` `895334adfb19a9f0ef808d1595264fb3435e2480a96e994b70855753d7180ac0`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x315	4897 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).

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