PDF malware analysis — malicious · e8b907a791be87f0

MALICIOUS

PDF

2.9 KB

MD5: 72461bf42aae01320f7891ad21deb27c SHA-1: 162616b2e9b58eda957a4b439442e729022c8834 SHA-256: e8b907a791be87f0a1abbead7f34cd5200fcf5444c091be14e6d5e2250aea5ce

82 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The PDF file contains embedded JavaScript, indicated by the PDF_JAVASCRIPT and PDF_JS heuristics. The embedded JavaScript stream, named 'javascript_obj0006_000.js', is suspicious and likely used to download and execute a secondary payload. The presence of RichMedia (Flash) further suggests an attempt to exploit vulnerabilities within the PDF viewer. The document body was unreadable, limiting further analysis of the lure.

Heuristics 8

RichMedia (Flash) high PDF_RICHMEDIA

PDF contains /RichMedia (Adobe Flash) which is a historic exploit vector
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
XFA form low PDF_XFA

PDF uses XML Forms Architecture — can contain script logic
String.fromCharCode low PDF_FROMCHARCODE

String.fromCharCode found — used to construct payload strings dynamically. Common in benign JavaScript libraries for codepoint manipulation, so this alone is informational; weaponised use is also caught by the dedicated fromCharCode-stage and exploit-shape rules. (matched inside decoded stream)
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.
Embedded URL info EMBEDDED_URL

One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
URL http://ns.adobe.com/xdp/
- http://www.xfa.org/schema/xci/2.6/
- http://www.xfa.org/schema/xfa-template/2.6/

Extracted artifacts 1

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0006_000.js` `9223d59a8a2001d71c7f1966aefd34a13ffc629762af367d9ccacd83d180a568`	pdf-javascript-stream	PDF /JS object 6 at offset 0x106	9238 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 199 eval/decoder/string-building token(s).

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