PDF malware analysis — malicious · 88d872317335fb5a

MALICIOUS

PDF

3.0 KB Created: 2008-31-20 53:85:00 Authoring application: Scribus 1.3.3.12 (via Scribus PDF Library 1.3.3.12)

MD5: 9485f052890478ddcd8752660b6d3aa8 SHA-1: d65a63abb687246586ef0a50b72f692891e88250 SHA-256: 88d872317335fb5a860f780eba048f75affc68a70035a9753891ca3828b633eb

218 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 JavaScript/Shell Script: JavaScript T1204.002 Malicious File: User Execution: Malicious File

The PDF file contains embedded JavaScript and is configured with an OpenAction to trigger execution upon opening. Critical heuristics indicate exploitation of CVE-2007-5659 (Collab.collectEmailInfo) and CVE-2008-2992 (util.printf), which are known vulnerabilities in Adobe Reader. These vulnerabilities are likely leveraged to execute the embedded JavaScript, which is obfuscated and likely intended to download and execute a second-stage payload.

Heuristics 7

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)
util.printf — CVE-2008-2992 critical CVE exact CVE_2008_2992

PDF JavaScript calls util.printf() — CVE-2008-2992 is a stack buffer overflow in Adobe Reader triggered by a long format-specifier argument. Widely exploited in the wild after disclosure. (matched in decompressed stream)
OpenAction trigger high PDF_OPENACTION

PDF has an /OpenAction — code runs automatically when opened
unescape() call high PDF_UNESCAPE

unescape() found — often used to decode shellcode in PDF JS exploits (matched inside decoded stream)
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_obj0013_001.js` `ca023430d0f9f5e18de140789ccfb3dba59abc7505d294f3a612657bfa7d82fb`	pdf-javascript-stream	PDF /JS object 13 at offset 0x3D7	4127 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 16 eval/decoder/string-building token(s).

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