PDF malware analysis — malicious · a1923dd2aae431a4

MALICIOUS

PDF

32.0 KB

MD5: f41a8f5fdc679b784b664fddd2be6dc3 SHA-1: 524842773fa51dade7e0ada2d3240da96568abf3 SHA-256: a1923dd2aae431a4b7cc159de8217f37e40f342b92d99b7ecf41493b228d8a98

216 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1204.002 Malicious File

The PDF file contains embedded JavaScript and RichMedia (Flash) content, as indicated by the PDF_JAVASCRIPT, PDF_JS, and PDF_RICHMEDIA heuristics. ClamAV detection as 'Pdf.Exploit.Agent-35955' and ML classification further confirm its malicious nature. The embedded SWF file, 'QSGpBTQICPAsUWR.swf', is likely a component of the exploit chain, potentially delivering a secondary payload.

Machine Learning

Nyx PDF Classifier malicious score 0.9956

Heuristics 7

ClamAV: Pdf.Exploit.Agent-35955 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Exploit.Agent-35955
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.
RichMedia (Flash) high PDF_RICHMEDIA

PDF contains /RichMedia (Adobe Flash) which is a historic exploit vector
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 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`QSGpBTQICPAsUWR.swf` `c2b666a3ef4c191b77b78c037656e50477b8ba3d35fd61ae843a3a1f4d41c5c1`	pdf-embedded-file	PDF EmbeddedFile object 16 at offset 0x1609	26774 bytes
Detection ClamAV: Pdf.Exploit.Agent-35955 Obfuscation or payload: likely Carved artifact entropy is 7.99, consistent with packed or encrypted content.
`javascript_obj0006_000.js` `9d7fbe7cb0979c250993cdcc3c40eaaa0d8fe319f0c2a16bd2108e264816335e`	pdf-javascript-stream	PDF /JS object 6 at offset 0x146	3870 bytes

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