PDF malware analysis — malicious · f6981a5d0d71feb0

MALICIOUS

PDF

31.5 KB

MD5: e74a34500a2e5a645a0aee70129ccf21 SHA-1: ba1627953049bed5de48cd0fb6bd77f49e3d3ecf SHA-256: f6981a5d0d71feb0fe9d8951d931e15c2aa36911f8ae1005dd5ebc9cadc8ce40

216 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.002 Malicious File T1059.007 JavaScript

This PDF file was flagged as malicious by ClamAV with the signature 'Pdf.Exploit.Agent-35955'. It contains embedded JavaScript and a Flash file (gSwuygLgTW.swf), indicating a multi-stage attack. The presence of these embedded objects suggests an attempt to exploit vulnerabilities within the PDF reader or deliver a secondary malicious payload.

Machine Learning

Nyx PDF Classifier malicious score 0.9945

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
`gSwuygLgTW.swf` `c2b666a3ef4c191b77b78c037656e50477b8ba3d35fd61ae843a3a1f4d41c5c1`	pdf-embedded-file	PDF EmbeddedFile object 16 at offset 0x13FF	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` `3cc25bb701ea9072005db3a4cd91738f19c300b0efd1c995458bd7bc7422856c`	pdf-javascript-stream	PDF /JS object 6 at offset 0x13E	3426 bytes

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