Malicious PDF — malware analysis report

Static analysis result for SHA-256 a3ebebcfe8f9318d…

MALICIOUS

PDF

196.7 KB Created: 2017-11-08 12:18:47 +02:00 Authoring application: Microsoft® Word 2013 First seen: 2026-05-04
MD5: 0d3afd56c38359be0bb2e4b49302d643 SHA-1: 8a0e19a06e4cb6cb98dba41f6d8edbe8952d7d94 SHA-256: a3ebebcfe8f9318dca82d949fde399767e880a381f46ee529292e76916a648a3
120 Risk Score

Malware Insights

MITRE ATT&CK
T1204.002 Malicious File T1059.001 PowerShell

The PDF file contains embedded JavaScript and is related to CVE-2023-26369, indicating an exploit attempt. The embedded URLs suggest the document is designed to lure the user into downloading a malicious payload. The presence of a visual download button further supports this phishing-like lure. The embedded JavaScript likely facilitates the download and execution of a second-stage payload from one of the provided URLs.

Machine Learning

  • Nyx PDF Classifier clean score 0.0021

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.
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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 https://homestaysnepal.com/css/Excel/excel PDF link annotation
    • https://firmabir.com/wp-admin/images/adobeComIn PDF document text
    • http://www.homestaysnepal.com/js/Excel/excelIn PDF document text
    • http://CDEDEEE1DBDEEEEDEBEEEEA2DFFFFDADF.FFD/D.FReferenced by PDF JavaScript
    • http://www.microsoft.com/typography/ctfontshttp://lucasfonts.comMicrosoftReferenced by PDF JavaScript
    • http://en.wikipedia.org/wiki/MIT_LicenseReferenced by PDF JavaScript
    • http://www.microsoft.com/typography/fonts/default.aspxReferenced by PDF JavaScript
    • http://crl.microsoft.com/pki/crl/products/MicrosoftTimeStampPCA.crl0XReferenced by PDF JavaScript
    • http://www.microsoft.com/pki/certs/MicrosoftTimeStampPCA.crt0Referenced by PDF JavaScript
    • http://crl.microsoft.com/pki/crl/products/MicCodSigPCA_08-31-2010.crl0ZReferenced by PDF JavaScript
    • http://www.microsoft.com/pki/certs/MicCodSigPCA_08-31-2010.crt0Referenced by PDF JavaScript
    • http://crl.microsoft.com/pki/crl/products/microsoftrootcert.crl0TReferenced by PDF JavaScript
    • http://www.microsoft.com/pki/certs/MicrosoftRootCert.crt0Referenced by PDF JavaScript
    • http://www.microsoft.com/Typography/0Referenced by PDF JavaScript

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_024_off0000ca43.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0xCA43 343188 bytes
SHA-256: 92fe4e4d3174161f194a9808143cb17716e0e6b72b7d96db951ba55ac083130d

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