PDF malware analysis — malicious · b61b293d52e57a52

MALICIOUS

PDF

2.3 KB

MD5: 4a51ca4d019ebf993d6ba0e703973557 SHA-1: 29b3f7a61f2d0f93e5b3814fccbbac724a89a51a SHA-256: b61b293d52e57a52bf90062ed77feffc469ebef6a5cb7bd8b43267998dbe3311

118 Risk Score

Malware Insights

MITRE ATT&CK

T1204.002 Malicious File: Malicious JavaScript T1059.001 Command and Scripting Interpreter: PowerShell T1059.003 Command and Scripting Interpreter: Windows Command Shell

The PDF file contains embedded JavaScript, indicated by the PDF_JAVASCRIPT and PDF_JS heuristics. The critical CVE_2007_5659 heuristic firing points to the use of the Collab.collectEmailInfo method, a known exploit vector for this vulnerability. The embedded JavaScript, specifically the unescape() call, is likely used to deobfuscate and execute a malicious payload. The extracted JavaScript object, javascript_obj0007_000.js, further supports the presence of malicious script content.

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.
unescape() call high PDF_UNESCAPE

unescape() found — often used to decode shellcode in PDF JS exploits
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 1

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0007_000.js` `bb0530504bea85341e48793f50828da706b5eabfa235d9bcecdec425f86d3b4f`	pdf-javascript-stream	PDF /JS object 7 at offset 0x26D	1486 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 3 eval/decoder/string-building token(s).

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