PDF malware analysis — malicious · d685ae2da1772001

MALICIOUS

PDF

12.3 KB

MD5: d9c4a0f3bf7987c33cfa1b28d15d6079 SHA-1: bdf35d3a872d643d7322c1b485f37a991886fce7 SHA-256: d685ae2da17720015ff9b17b90b3546d5cff3b75e87e3ebcacfb924228878de3

138 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The PDF file contains embedded JavaScript, specifically triggering the CVE-2007-5659 vulnerability via the `Collab.collectEmailInfo()` method. This indicates an attempt to exploit Adobe Reader. Two deobfuscated JavaScript files, `legacy_pdfkit_stage_000.js` and `legacy_pdfkit_stage_001.js`, were extracted, suggesting a multi-stage attack. The primary intent appears to be the execution of this JavaScript to download and run 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-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` `069cd251b6a15737f81d94fb20930715a6cad8e785f5c518b4a8cc51631fa743`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2F5	11948 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 long base64-like blob(s).
`legacy_pdfkit_stage_001.js` `2ac4def3ecf14c3c9eddb4b0c41dbf78cd9ea3e8250e95d5b28bb5ae2dd512a9`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2F5	4943 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).

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