PDF malware analysis — malicious · ef1ea1de22705846

MALICIOUS

PDF

12.1 KB

MD5: d6517b2d4ce39f592605acce2a27054e SHA-1: c0832342b9dc9dafed527d993e034f76af85b6bf SHA-256: ef1ea1de22705846092c7181385104ff36fab2a0c2303499127544444579a983

138 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The PDF file contains embedded JavaScript, triggered by the CVE-2007-5659 vulnerability related to the Collab.collectEmailInfo function. The heuristics indicate that this JavaScript is deobfuscated into two files, legacy_pdfkit_stage_000.js and legacy_pdfkit_stage_001.js. This suggests the PDF is designed to exploit this vulnerability to download and execute a secondary payload, as indicated by the ClamAV detection of Pdf.Exploit.Agent-36065.

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` `9f08f04c34a0ea75a78d21ec0bdbc74e8a61d215404d65afc514c1e0098502f7`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x315	12551 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 long base64-like blob(s).
`legacy_pdfkit_stage_001.js` `aae49f5f9d288a3a6a5a9451461d1a441768e6803f8e6ac22aa129bd7b2e4b39`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x315	5175 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).

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