PDF malware analysis — malicious · 3ffd72dfec4d2bdf

MALICIOUS

PDF

7.4 KB

MD5: 0eb1c4fcb39055cfffd8861f063ed3da SHA-1: 218cb86d3d35e3a8354345551687724ec7f7ff43 SHA-256: 3ffd72dfec4d2bdff1e54b7a1df1a5778352cae5c928f517533fa69c53e26ae1

178 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 JavaScript/JScript T1204.002 Malicious File

The PDF file contains embedded JavaScript and triggers multiple PDF-specific heuristics, including the use of unescape() and JBIG2 decoding with active content. ClamAV identifies the file as Pdf.Exploit.Agent-21638. The embedded JavaScript is the primary mechanism for exploitation, likely leading to the download and execution of a secondary payload, which is a common attack pattern for this type of malicious document.

Heuristics 7

JBIG2 + active content high CVE related PDF_JBIG2_ACTIVE_CONTENT

JBIG2Decode appears with JavaScript/XFA/RichMedia — a related indicator for JBIG2 parser-exploit families including CVE-2021-30860 and CVE-2009-0658, but not a unique CVE fingerprint.
ClamAV: Pdf.Exploit.Agent-21638 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Exploit.Agent-21638
unescape() call high PDF_UNESCAPE

unescape() found — often used to decode shellcode in PDF JS exploits (matched inside decoded stream)
JBIG2Decode filter medium PDF_JBIG2

JBIG2 image decoder present — historically used in zero-click 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.
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 1

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0006_000.js` `7aa50b8f716b9b0c5a67787b6fb23d4f9e38eef3434d29f31e176e142d5fd6e9`	pdf-javascript-stream	PDF /JS object 6 at offset 0x234	5959 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 4 eval/decoder/string-building token(s).

Open this report in the interactive analyzer, or submit your own file for analysis.