PDF malware analysis — malicious · 26b61e8e5f23cbee

MALICIOUS

PDF

11.4 KB

MD5: ee3b572b3716239a8ea40ffe1fbad56c SHA-1: 782a718755d6bed3e5d199e0c46b1c5df3542790 SHA-256: 26b61e8e5f23cbeeead8dfa9377791241883ddbcc2e276ebeab1812d935a2fe1

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. This JavaScript is further obfuscated and split into multiple files, indicating a multi-stage download and execution process. The presence of deobfuscated JavaScript files suggests the intent is to download and execute a second-stage 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-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` `24d31ebcac2bbe7d0209c6263ce1fef9ac5f545c0e4c82c2c4bbb9cc10ca20ab`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x315	11815 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 long base64-like blob(s).
`legacy_pdfkit_stage_001.js` `00e45c069e577fe00d769da6670024155f51d656a8b8fb773ded39c272ce5138`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x315	4828 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).

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