PDF malware analysis — malicious · fbd7a1e65899c4b0

MALICIOUS

PDF

11.7 KB

MD5: e89aa5f881d82411348c3e0cf9c7e7fe SHA-1: b86c10a49ae13fbded32f7ecc140ac2bab53669e SHA-256: fbd7a1e65899c4b003f6d3d1d57fcba0f73a59f9d2cc0d63b3cca27948a5403e

138 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The file is a PDF containing embedded JavaScript, identified as malicious by ClamAV and triggering critical heuristics related to CVE-2007-5659. The JavaScript is further deobfuscated into two files, legacy_pdfkit_stage_000.js and legacy_pdfkit_stage_001.js. The primary function of the embedded JavaScript appears to be exploiting a known vulnerability (CVE-2007-5659) to download and execute a secondary payload, indicated by the 'Pdf.Exploit.Agent-36065' detection and the presence of deobfuscated script files.

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` `c2eca5457321b158fe692bc11c64e636b356a2ca6004be211886df9d9e843367`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x315	11906 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 long base64-like blob(s).
`legacy_pdfkit_stage_001.js` `6352fdaa1510f4e86c6d416744a07c32733755d0410002cb469e020abfe3dc87`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x315	4949 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).

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