PDF malware analysis — malicious · 5446a7e330bb2c1a

MALICIOUS

PDF

6.5 KB

MD5: 1482c711b1bd1135e1987866dd89d5d3 SHA-1: e89e97d01ffc76f9b21c6c5ec21fe9f321591108 SHA-256: 5446a7e330bb2c1a479d790d01ebef128b1f15cf80bcfbdb0840a2c354286ff5

178 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell

The PDF file contains embedded JavaScript, indicated by multiple heuristic firings including PDF_JAVASCRIPT, PDF_JS, and PDF_UNESCAPE. The ClamAV detection 'Heuristics.PDF.ObfuscatedNameObject' further suggests malicious intent. The embedded JavaScript, extracted as 'javascript_obj0006_000.js', is likely responsible for executing the malicious payload. The presence of JBIG2Decode filters and active content also points to obfuscation techniques used to hide malicious code.

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` `6f54e5bc70485e251a6278b919c8761a31815f821d70c2e0992a141288b530b6`	pdf-javascript-stream	PDF /JS object 6 at offset 0x236	5040 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 4 eval/decoder/string-building token(s). Carved artifact contains 1 long base64-like blob(s).

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