PDF malware analysis — malicious · 972b49d00c39138d

MALICIOUS

PDF

3.6 KB

MD5: 3545f06a0e49ae2e40d924224900647f SHA-1: aba99beb627744a1c3298061e59e144d2ab018a1 SHA-256: 972b49d00c39138dd5df3ac663e643c6d10d14105f2b4e6d972af65a262a6023

176 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The PDF contains embedded JavaScript that is triggered by opening the document. This JavaScript is designed to exploit the CVE-2017-11882 vulnerability, as indicated by ClamAV detections on both the PDF and an extracted RTF artifact named 'Germas.doc'. The ML classifier also flagged the PDF as malicious with high confidence. The embedded JavaScript likely attempts to download and execute a second-stage payload.

Machine Learning

Nyx PDF Classifier malicious score 1.0000

Heuristics 6

ClamAV: Rtf.Exploit.CVE_2017_11882-6584355-1 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Rtf.Exploit.CVE_2017_11882-6584355-1
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.
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 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`Germas.doc` `19d97f50d204271b7702ce0ec1762513ada639f98681271327b4af13af65f20e`	pdf-embedded-file	PDF EmbeddedFile object 8 at offset 0x38E	8340 bytes
Detection ClamAV: Rtf.Exploit.CVE_2017_11882-6584355-1 Obfuscation or payload: likely Carved artifact contains 1 long base64-like blob(s).
`javascript_obj0009_000.js` `a840719dcce0a1c94eca9c702ae064248fdbd080bc68cbc3704244086fba38d8`	pdf-javascript-stream	PDF /JS object 9 at offset 0xCF6	59 bytes
`javascript_obj0009_001.js` `f5421024118a9a720f027bcc0246c31402e97263097b8693da3465336c2776c6`	pdf-javascript-stream	PDF /JS object 9 at offset 0xCF6	57 bytes

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