PDF malware analysis — malicious · bd5b0074376a22d4

MALICIOUS

PDF

2.0 KB Authoring application: Python PDF Library 055 http072057057pybrary056net057pyPdf057

MD5: 3fee6a0c4e7964b2f81c79bc96dce6fe SHA-1: 79340b7c25b4fc1e2ae003dbf7a34f15a372548b SHA-256: bd5b0074376a22d47f14bb98738b930c31b56485dd21d0c88129789b5d51f777

156 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.001 Malicious Link

The PDF file contains embedded JavaScript that is obfuscated using unescape() and leverages the CVE-2007-5659 vulnerability (Collab.collectEmailInfo). This indicates an attempt to execute arbitrary code upon opening the document. The extracted JavaScript artifact, 'javascript_obj0009_000.js', is likely responsible for the malicious payload delivery.

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. (matched in decompressed stream)
unescape() call high PDF_UNESCAPE

unescape() found — often used to decode shellcode in PDF JS exploits (matched inside decoded stream)
Suspicious extracted artifact high 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.
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.

Extracted artifacts 1

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0009_000.js` `68031aad25caaebb245961e0433b89b1cb806d0c4018d99f83e8d1ce21b4e42d`	pdf-javascript-stream	PDF /JS object 9 at offset 0x2EE	1684 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).

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