PDF malware analysis — malicious · a2ad6dea39a000bc

MALICIOUS

PDF

31.2 KB

MD5: e9961994b576a924e2dcbc052d1a7678 SHA-1: 15279358165e227f888be51fbf63514e745e6b4a SHA-256: a2ad6dea39a000bc3da337bd6d917710460c9c8e4368b6110b649b185b84ed95

256 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File T1566.001 Spearphishing Attachment

This PDF file contains embedded JavaScript and a Flash object, both of which are commonly used to exploit vulnerabilities and deliver malicious payloads. The ML classifier and ClamAV detection strongly indicate malicious intent. The embedded JavaScript, identified as 'javascript_obj0006_000.js', and the Flash object 'lLCNlrwDEwv.swf' are the primary components responsible for the exploit. The unescape() function call within the PDF further suggests obfuscation and exploitation.

Machine Learning

Nyx PDF Classifier malicious score 0.9945

Heuristics 8

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
unescape() call high PDF_UNESCAPE

unescape() found — often used to decode shellcode in PDF JS exploits (matched inside decoded stream)
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
`lLCNlrwDEwv.swf` `c2b666a3ef4c191b77b78c037656e50477b8ba3d35fd61ae843a3a1f4d41c5c1`	pdf-embedded-file	PDF EmbeddedFile object 16 at offset 0x12A1	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` `538cf4be3740356628cbd69c803acb6d3b0e0dca4d83a14c443f00ea0d6b2ff0`	pdf-javascript-stream	PDF /JS object 6 at offset 0x132	3130 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 eval/decoder/string-building token(s).

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