Malicious PDF — malware analysis report

Static analysis result for SHA-256 164bab9d32eca2af…

MALICIOUS

PDF

160.3 KB Created: 2016-03-08 21:44:39 +01:00 Authoring application: PDFescape Online - https://www.pdfescape.com (via RAD PDF 3.17.1.0 - https://www.radpdf.com)
MD5: 3e9630d7a09759afb51e84f8608e6774 SHA-1: eca12404d4a1f8e293346b3448cf6816e34ee1e9 SHA-256: 164bab9d32eca2af452a0e70f764e90ee4ead5b2b73604bab83470cd5e3e8051
132 Risk Score

Malware Insights

MITRE ATT&CK
T1203 Exploitation for Client Execution T1059.007 JavaScript T1566.001 Spearphishing Attachment

The sample is a PDF file that contains embedded JavaScript and is related to CVE-2023-26369. The embedded JavaScript likely attempts to download and execute a second-stage payload from URLs such as http://lwi.org.lr/js/. The use of a URL shortener (http://bit.ly/1RyMVp3) suggests an attempt to obscure the final destination.

Machine Learning

  • Nyx PDF Classifier clean score 0.0043

Heuristics 6

  • TrueType bitmap font + active content — CVE-2023-26369 related high CVE related PDF_CVE_2023_26369_RELATED
    PDF embeds a TrueType font with bitmap tables (EBDT/sbix/CBDT) alongside exploit delivery indicators — CVE-2023-26369 exploits the sfac_GetSbitBitmap function in Adobe's libCoolType for arbitrary code execution. This CVE was actively exploited in the wild, but this rule does not validate the malformed EBLC/EBDT primitive.
  • PDF JavaScript exploit cluster critical PDF_JS_EXPLOIT_CLUSTER
    PDF combines an executable JavaScript/action surface with exploit staging indicators such as eval/unescape/fromCharCode, XFA script content, or a related CVE pattern. Benign form JavaScript remains low-severity, but this correlated cluster is high-confidence malicious behavior.
  • Clickable URI uses URL shortener medium PDF_URL_SHORTENER_URI
    PDF contains a clickable HTTP(S) action whose destination is a URL shortener. This hides the final landing page from static review and is common in phishing redirect PDFs.
  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://lwi.org.lr/js/
    • https://tractiontx.com/ghya
    • https://ramez.me/Purchseorder
    • https://www.radpdf.com
    • https://www.radpdf.com)/Author(Mr
    • https://www.pdfescape.com)/CreationDate(D:20160308214439+01
    • http://www.dynaforms.com
    • http://bit.ly/1RyMVp3
    • http://bit.ly/1USrEtA
    • https://www.pdfescape.com
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://ns.adobe.com/pdf/1.3/
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://www.microsoft.com/typography/ctfontshttp://fontfabrik.comYou
    • http://www.microsoft.com/typography/fonts/default.aspx
    • http://crl.microsoft.com/pki/crl/products/CSPCA.crl0H
    • http://www.microsoft.com/pki/certs/CSPCA.crt0
    • http://crl.microsoft.com/pki/crl/products/tspca.crl0H
    • http://www.microsoft.com/pki/certs/tspca.crt0
    • http://www.microsoft.com/typography

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000013c9.bin
a6eacb5f4c318f191f5c7ef56b8a9d24965db43dd12e86dc8eafc984e1163d47		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13C9 169476 bytes

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