PDF malware analysis — malicious · 697a66543288be8d

MALICIOUS

PDF

25.8 KB

MD5: e05e05fb8118121487d272bee1d71b9e SHA-1: c1c3424ba2532f5e42ea5aa2665d9ed3879b02f2 SHA-256: 697a66543288be8d237b9bffec4c571533a7bc019906615bcbc9af88a769eb3b

256 Risk Score

Malware Insights

MITRE ATT&CK

T1203 Exploitation for Client Execution T1059.007 JavaScript

This PDF file contains embedded JavaScript that utilizes the exportDataObject and nLaunch functions, indicating an attempt to launch an embedded file. The critical heuristic 'PDF_JS_EXPORT_LAUNCH_DROPPER' and ClamAV detection 'Doc.Exploit.CVE_2017_11882-6934206-0' strongly suggest exploitation of the CVE-2017-11882 vulnerability to drop and execute a secondary payload. The embedded artifact 'DocPDF.doc' is likely the dropped payload.

Machine Learning

Nyx PDF Classifier malicious score 1.0000

Heuristics 8

exportDataObject + nLaunch — embedded-file launch-on-open dropper critical PDF_JS_EXPORT_LAUNCH_DROPPER

PDF JavaScript calls exportDataObject() with nLaunch set, which extracts the document's embedded file and launches it in its default application. This is a launch-on-open dropper: the embedded file is the payload. No benign workflow auto-launches an extracted PDF attachment.
ClamAV: Doc.Exploit.CVE_2017_11882-6934206-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Doc.Exploit.CVE_2017_11882-6934206-0
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.
ASCIIHexDecode filter (with exploit indicators) medium PDF_FILTER_HEX

Hex-encoding filter present alongside exploit delivery indicators — often used to hide payload or shellcode bytes
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.
Embedded file low PDF_EMBEDDED

PDF embeds a file attachment — could carry an executable or another weaponised document as a nested payload
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
`DocPDF.doc` `0eff4682ef51d71c1d7808207cc173301aa48d0d20079fab131909e5da0fd0b8`	pdf-embedded-file	PDF EmbeddedFile object 8 at offset 0x3A2	8350 bytes
Detection ClamAV: Doc.Exploit.CVE_2017_11882-6934206-0 Obfuscation or payload: likely Carved artifact contains 1 long base64-like blob(s).
`javascript_obj0009_000.js` `e213073105e9c57bb63565954108294740c7deda1c08b4c6336cb9085eed9192`	pdf-javascript-stream	PDF /JS object 9 at offset 0x6589	59 bytes
`javascript_obj0009_001.js` `6466924d3bf28ab334584efd9e24f5a018721e41bec6d5ff8b1b399263f8f680`	pdf-javascript-stream	PDF /JS object 9 at offset 0x6589	57 bytes
`combined_document_js_000.js` `935498d2344d279194d59e55eff906a367ca662c88f5384519ac680602737b8d`	deobfuscated-js	combined document JavaScript streams at offset 0x6589	117 bytes

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