PDF malware analysis — malicious · cb444cc23af5c788

MALICIOUS

PDF

16.3 KB Created: 2009-05-01 21:21:45 Authoring application: tvEeSFCPx (via NeTSnrx)

MD5: 0f9a2dfabd1b10496c8a9033189eef54 SHA-1: 810d182909f0c26f2d0aadda0254114951ca196c SHA-256: cb444cc23af5c78844e2346354b7e300c6d036bb4d47191f1d2246406cb75753

306 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.001 Malicious Link T1204.002 Malicious File

The PDF file contains embedded JavaScript triggered by the OpenAction, exploiting CVE-2009-0927, CVE-2007-5659, and CVE-2008-2992. The JavaScript is heavily obfuscated using String.fromCharCode and other techniques, but analysis indicates it likely decodes and executes a secondary stage payload, as suggested by the ClamAV detection 'Js.Exploit.Shellcode-18' on an extracted artifact. The file's metadata also points to a suspicious authoring application.

Heuristics 8

Collab.getIcon — CVE-2009-0927 critical CVE exact CVE_2009_0927

PDF JavaScript calls Collab.getIcon — CVE-2009-0927 is a stack buffer overflow in Adobe Reader triggered by Collab.getIcon() with a crafted argument. Allows arbitrary code execution. (identified after JavaScript deobfuscation)
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)
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. (identified after JavaScript deobfuscation)
OpenAction trigger high PDF_OPENACTION

PDF has an /OpenAction — code runs automatically when opened
JavaScript action low 1 related finding 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.
String.fromCharCode low PDF_FROMCHARCODE

String.fromCharCode found — used to construct payload strings dynamically. Common in benign JavaScript libraries for codepoint manipulation, so this alone is informational; weaponised use is also caught by the dedicated fromCharCode-stage and exploit-shape 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` `4ca1f2bae1cbb4d020e266ebde5a406d6592c87851cb898cfaaff8dea6cb352f`	pdf-javascript-stream	PDF /JS object 7 at offset 0x215	15529 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 eval/decoder/string-building token(s).
`javascript_obj0007_001.js` `f3d6d2b64f398958364ed12c3b1fc817d844888b471fb3a549cc76f0b170d5d2`	pdf-javascript-stream	PDF /JS object 7 at offset 0x215	15347 bytes
`numeric_charcode_stage_000.js` `7a6aaf2320b0e8b3a37d6a6edf02fd66de47ee1fdc678c52953fcb5ae5340c7f`	deobfuscated-js	numeric char-code string decoded JavaScript at offset 0x22D	4678 bytes
Detection ClamAV: Js.Exploit.Shellcode-18 Obfuscation or payload: likely Carved artifact contains 9 eval/decoder/string-building token(s). Carved artifact contains 1 long base64-like blob(s).

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