PDF malware analysis — malicious · 78c107ca07febc17

MALICIOUS

PDF

13.2 KB

MD5: 3067b154397123dc7d18d6ddc2c72c17 SHA-1: 2b305dc00bb9cae1b0c26f5f4ed4e639790a72b8 SHA-256: 78c107ca07febc1744165e1fe5d92271b7951832b7ca6ca8d99fc32ffb6868d9

78 Risk Score

Malware Insights

MITRE ATT&CK

T1204.002 Malicious File: Malicious File T1059.001 Command and Scripting Interpreter: PowerShell

The PDF file contains embedded JavaScript that exploits the CVE-2007-5659 vulnerability using the Collab.collectEmailInfo function. This JavaScript is designed to download and execute a secondary payload, as indicated by the extracted JS files and the critical heuristic firing. The overall goal appears to be the initial compromise and execution of further malicious code.

Heuristics 4

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)
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` `bedd676af9bf2e3ca07f9e3a10d07bc561e9745801f30653ef176c0c1e7620a3`	pdf-javascript-stream	PDF /JS object 7 at offset 0x19D	336 bytes
`legacy_pdfkit_stage_000.js` `39ae43e989b07a24610a603d5465df62f5f19d948909b0d803fbc2cab45497e5`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2EC	12354 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 long base64-like blob(s).
`legacy_pdfkit_stage_001.js` `784af4f826cacd30f72ca60fd5d8e842e9de87603359b4c01edef14fc6843205`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2EC	5104 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).

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