PDF malware analysis — malicious · 8ea1b277a3c42cb3

MALICIOUS

PDF

13.6 KB

MD5: 0c56d0e677a2ea852fe46a73c7771640 SHA-1: 34b28bb6d3644516f43ad21f463d0195880a619b SHA-256: 8ea1b277a3c42cb33c9c0333e763c4551f18a8eab56df4a1e22c2bb39e67a1c3

298 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.001 Malicious Link

The PDF file contains embedded JavaScript that exploits multiple Adobe Reader vulnerabilities including CVE-2009-0927, CVE-2007-5659, and CVE-2008-2992. The JavaScript employs a custom Base64 decoder to deobfuscate and execute a second-stage payload, as indicated by the ClamAV detection 'Js.Exploit.Shellcode-18'. The extracted JavaScript streams and the heuristic firings strongly suggest this document is designed to compromise the user's system by leveraging these known exploits.

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)
ClamAV detection on extracted artifact critical EXTRACTED_FILE_CLAMAV

ClamAV flagged at least one file extracted from inside this sample. Even when the wrapping document carries no AV detection of its own, a hit on the carved artifact is a strong indicator the sample is a delivery vehicle.
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 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0008_000.js` `c836226954d40ad5ebdae681a15fd30adb86b3cae2ffe7a41bf7b385c108b0f0`	pdf-javascript-stream	PDF /JS object 8 at offset 0x1E7	13205 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 eval/decoder/string-building token(s). Carved artifact contains 1 long base64-like blob(s).
`custom_b64_stage_000.js` `6a77f16b6dbc271a70942557f8feaee3133e38ab72f8589923de4592e2a94a88`	deobfuscated-js	custom Base64 decoded JavaScript layer 2 (PDF /JS object 8) at offset 0x6E8	6500 bytes
Detection ClamAV: Js.Exploit.Shellcode-18 Obfuscation or payload: likely Carved artifact contains 11 eval/decoder/string-building token(s).

Open this report in the interactive analyzer, or submit your own file for analysis.