PDF malware analysis — malicious · 4b3184d6d6f72828

MALICIOUS

PDF

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

MD5: b17659e9f6fde3e3584eb036b82d5c78 SHA-1: 46c64e93f650bfbcb5a9d5de83cc57472e525ec5 SHA-256: 4b3184d6d6f728288fbbf4766de84fe0e412fff92fcaeb88aebbf1c4ef640c22

218 Risk Score

Malware Insights

MITRE ATT&CK

T1204.002 Malicious File: User Execution T1059.007 Command and Scripting Interpreter: JavaScript

The PDF file contains embedded JavaScript and triggers an OpenAction upon opening, indicating an attempt to exploit vulnerabilities. Specifically, the 'Collab.collectEmailInfo' (CVE-2007-5659) and 'util.printf' (CVE-2008-2992) functions are present, which are known to be exploitable in older versions of Adobe Reader. These exploits likely facilitate the execution of malicious JavaScript, which is also present in the file.

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` `2207b6752030baefac1cc605a85e14d56c4be0252e8248ee8981b1c23fbe1c54`	pdf-javascript-stream	PDF /JS object 13 at offset 0x3D7	3137 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).

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