PDF malware analysis — malicious · dd39355a129b443e

MALICIOUS

PDF

13.0 KB

MD5: 1d27e19d0e273d14cab7b66420809317 SHA-1: 54ea77ae48212ee517d236727ddad115fad66d61 SHA-256: dd39355a129b443e51a1a3bf8d9daff3ae9a4d46fd8ea365d19a9e5f22388bcb

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, specifically targeting the Collab.collectEmailInfo function. This exploit is designed to execute arbitrary JavaScript, which is then used to deobfuscate and execute further stages of malicious code. The presence of multiple deobfuscated JavaScript files suggests a multi-stage attack designed to download and execute a secondary 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-36064 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Exploit.Agent-36064
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` `a5c8f0f722df4dd9876a0087e1eee65bd3020c5995f94f6729f7e17f3f3677a0`	pdf-javascript-stream	PDF /JS object 7 at offset 0x19D	331 bytes
`legacy_pdfkit_stage_000.js` `fb2590430cc6ff8266d0bac29c96c8b532dcc7a82bf34a17ef40d4829f600c02`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2F2	12078 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 long base64-like blob(s).
`legacy_pdfkit_stage_001.js` `ee950f6c550663d29354828eb8d87b91d5f1e195d0b91a88945321afd99ca3ea`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2F2	5027 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).

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