PDF malware analysis — malicious · 28d135ebb565e64c

MALICIOUS

PDF

7.4 KB

MD5: 25cfa0c578883476ded0d953f47f9fab SHA-1: a7e2cad40573eca9e4456b97c6e4ee91550670d7 SHA-256: 28d135ebb565e64ca3f398e0c21b9a93961ed0812e2c0d3968b25abc1e4ab404

178 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The PDF file contains obfuscated JavaScript, indicated by multiple PDF-specific heuristics including 'PDF_JAVASCRIPT', 'PDF_JS', 'PDF_UNESCAPE', and 'PDF_JBIG2_ACTIVE_CONTENT'. The ClamAV detection 'Heuristics.PDF.ObfuscatedNameObject' further supports the malicious nature. The embedded JavaScript artifact 'javascript_obj0006_000.js' is likely responsible for downloading and executing a secondary payload, a common technique for initial access.

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: Heuristics.PDF.ObfuscatedNameObject critical CLAMAV_DETECTION

ClamAV detected this file as malware: Heuristics.PDF.ObfuscatedNameObject
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` `0b8297ca5f717ebfc026a058e7f14da7f0aeaaae2554258c92d446805c4d14c0`	pdf-javascript-stream	PDF /JS object 6 at offset 0x22B	5919 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.