PDF malware analysis — malicious · 3c77282a661b3052

MALICIOUS

PDF

29.4 KB

MD5: c34187a1bef85fb14e7ccd1e8c7cbe63 SHA-1: 556c5518662a0aab130519442f93349dd485034c SHA-256: 3c77282a661b30529304ecea31a008dd640ee388c814612cf2d500b8c0725977

226 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The PDF file contains embedded JavaScript and a Flash object, indicated by the PDF_JAVASCRIPT, PDF_JS, PDF_RICHMEDIA, and EXTRACTED_FILE_STATIC_TRIAGE heuristics. The ClamAV detection of 'Pdf.Exploit.Agent-35955' on both the main file and the extracted artifact confirms its malicious nature. The embedded JavaScript, likely obfuscated as suggested by the static triage, is responsible for loading the Flash object, which is a common technique for exploiting vulnerabilities and delivering secondary payloads.

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
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
`hJzrcNRhacMbB.swf` `c2b666a3ef4c191b77b78c037656e50477b8ba3d35fd61ae843a3a1f4d41c5c1`	pdf-embedded-file	PDF EmbeddedFile object 16 at offset 0xB8F	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` `ea7c2c14b0d738ac81f604c9fbad3211dbb7838c2ba351df9517549360590bf4`	pdf-javascript-stream	PDF /JS object 6 at offset 0xEC	1902 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s).

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