PDF malware analysis — malicious · 933745b1dffac8e0

MALICIOUS

PDF

11.5 KB

MD5: d34a7d379d8aa28a937f2944bf41ac73 SHA-1: bb478dbccba7f89740d5b3e2e1722d537959ac86 SHA-256: 933745b1dffac8e0f7865dfd0ddf2bdb5f5550ddce5b7647b1929fb4d9aa82f2

138 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The file is a PDF document that contains embedded JavaScript, identified by multiple heuristics including PDF_JAVASCRIPT and PDF_JS. The critical CVE_2007_5659 heuristic indicates the use of a specific exploit targeting the `Collab.collectEmailInfo` function to execute JavaScript. This JavaScript is further obfuscated and split into multiple files, suggesting a multi-stage attack. The primary intent appears to be the execution of arbitrary code, likely to download and run a secondary payload, as indicated by the deobfuscated JavaScript artifacts.

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` `dc24aabb41acae90c5c0b02792e9e5f5b1bb493e8dfae157c14e55b6468bd84a`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x315	11909 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 long base64-like blob(s).
`legacy_pdfkit_stage_001.js` `2fd28e40bd72c003f8a8db7caa80a320ae3434e30d2070136eb6b5d47d4a30b3`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x315	4871 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).

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