PDF malware analysis — malicious · 6d5b97a5700cebb0

MALICIOUS

PDF

2.3 KB

MD5: 41c486b9a02a1bd776f83d90a590ba69 SHA-1: cf4a58ec0fc2c750121d4e92d522e0824c751b24 SHA-256: 6d5b97a5700cebb0d7f7df9946c68be746f9b06a206ab2df85e68f81bccfb591

388 Risk Score

Malware Insights

MITRE ATT&CK

T1203 Exploitation for Client Execution T1059.007 JavaScript

This PDF file contains multiple embedded JavaScript streams that exploit several known Adobe Reader vulnerabilities, including CVE-2009-0927 (Collab.getIcon) and CVE-2008-2992 (util.printf). The JavaScript is obfuscated but appears to be a dispatcher for these exploits. The primary goal is likely to achieve arbitrary code execution, enabling the download and execution of a secondary payload. The reconstructed URL 'http://www.google.com/intl/en/images/logo.gif' is likely a decoy or part of the exploit chain.

Machine Learning

Nyx PDF Classifier malicious score 1.0000

Heuristics 9

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)
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)
Pidief-style multi-CVE JavaScript dispatcher critical CVE likely PDF_PIDIEF_MULTI_CVE_DISPATCH

A single JavaScript body branches on app.viewerVersion and invokes two or more of the canonical Reader sinks (Collab.collectEmailInfo, Collab.getIcon, util.printf with a field-width format string). This is the 2009-2010 Pidief.J multi-exploit landing template: a per-version dispatcher that fires the matching CVE chain for whichever Reader version opens the file.
PDF JavaScript exploit cluster critical PDF_JS_EXPLOIT_CLUSTER

PDF combines an executable JavaScript/action surface with exploit staging indicators such as eval/unescape/fromCharCode, XFA script content, or a related CVE pattern. Benign form JavaScript remains low-severity, but this correlated cluster is high-confidence malicious behavior.
Multi-CVE Adobe Reader JavaScript exploit kit critical PDF_ADOBE_READER_MULTI_CVE_JS_KIT

One recovered JavaScript stage contains multiple version-gated Adobe Reader exploit branches. This is stronger evidence than independent API keywords: the PDF is selecting old Reader vulnerabilities by viewer version and running heap-sprayed Acrobat JavaScript exploit paths.
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 4

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj263984_000.js` `806aa3f143859d3871a009e943bd8c06848587606a2cc5bd21a59a7f73720bbf`	pdf-javascript-stream	PDF /JS object 263984 at offset 0x197	6965 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 10 eval/decoder/string-building token(s). Carved artifact contains 3 long base64-like blob(s).
`javascript_obj263985_001.js` `91ba8fa1b09c7874e43333ff247891aefb0234f9bfed5c2871e978dbde9431c0`	pdf-javascript-stream	PDF /JS object 263985 at offset 0x6B8	151 bytes
`javascript_obj263986_002.js` `aa9508a56b62af621b1351f63eb280c1f8023f84078fa786536d38a307551e89`	pdf-javascript-stream	PDF /JS object 263986 at offset 0x787	515 bytes
`combined_document_js_000.js` `13e0ce8cd84aa3f8ffe990ed595f2f3b0c4b51c17250b49e0fe1aead8abdcfbb`	deobfuscated-js	combined document JavaScript streams at offset 0x197	7633 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 10 eval/decoder/string-building token(s). Carved artifact contains 3 long base64-like blob(s).

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