PDF malware analysis — malicious · 03ebfa1608151e68

MALICIOUS

PDF

100.3 KB

MD5: 96cbcddaae17f6c2b9fd305c6d4ffb5d SHA-1: 526e272284dbbbaa0b50a5861986ccb1539b6e07 SHA-256: 03ebfa1608151e680ceafe55ffe3844c0d5f5b03d26ed29146c8e863a649fbc9

368 Risk Score

Malware Insights

MITRE ATT&CK

T1203 Exploitation for Client Execution T1059.007 JavaScript

This PDF file exploits the CVE-2009-0927 vulnerability via embedded JavaScript. The JavaScript, which is heavily obfuscated, is designed to download and execute a second-stage payload, as indicated by the 'Js.Exploit.Shellcode-18' ClamAV detection on extracted artifacts. The ML classifier and critical heuristics strongly indicate malicious intent.

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.
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.
ClamAV: Pdf.Exploit.CVE_2009_0927-1 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Exploit.CVE_2009_0927-1
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
Generic recovered JavaScript exploit stage high PDF_GENERIC_STAGE_RECOVERY

Bounded static stage recovery exposed hidden JavaScript through generic transforms such as null-byte collapse, percent decoding, marker replacement, arithmetic character codes, fromCharCode, numeric arrays, numeric-array minus-key decoders, alphabet-index arrays, /Producer half-difference metadata arrays, hex literals, marker-stripped Base64 literals, custom 6-bit XOR table decoders, or repeated-marker hex carriers. This rule is emitted only when the recovered stage contains exploit-like Acrobat JavaScript or shellcode markers.
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 5

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0007_000.js` `31f10e876fc3a544d093fb96cccfe994a9c6d6af214ba9b5247ba254b7604c3b`	pdf-javascript-stream	PDF /JS object 7 at offset 0x297	101736 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).
`javascript_obj0007_001.js` `8edbcdc6fc3ff8211fbc3009ea4ad62599f88260cde5f7cf572420bf32701d61`	pdf-javascript-stream	PDF /JS object 7 at offset 0x297	99870 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s).
`generic_stage_recovery_000.js` `708904afbf44a74247b40f53e85e4eb621c7d996ff7913a4e385e8ad901ec074`	deobfuscated-js	generic stage recovery percent-decode from JavaScript object 7 at offset 0x297	101728 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).
`generic_stage_recovery_001.js` `901a824ffe93d13370f0c7f7de96b0dfa1823da2aa3eaa3375b3232df3c27e0a`	deobfuscated-js	generic stage recovery percent-decode from combined JavaScript objects at offset 0x297	201599 bytes
Detection ClamAV: Js.Exploit.Shellcode-18 Obfuscation or payload: likely Carved artifact contains 6 eval/decoder/string-building token(s).
`combined_document_js_000.js` `7278e901a6fc7fa406a0e2bfbb88d4a2b0dc028a83ef7455a4a00da71318d946`	deobfuscated-js	combined document JavaScript streams at offset 0x297	201607 bytes
Detection ClamAV: Js.Exploit.Shellcode-18 Obfuscation or payload: likely Carved artifact contains 6 eval/decoder/string-building token(s).

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