Malicious PDF — malware analysis report

Static analysis result for SHA-256 777ab7642d3b07e9…

MALICIOUS

PDF

60.0 KB Created: 2018-06-27 15:05:37 Authoring application: Qt 5.5.1
MD5: 3f3a5653f62922c001bcf88f9cb76408 SHA-1: 253452f483de7bfd69839753ca2e8b354d625b88 SHA-256: 777ab7642d3b07e94a743cdd0e2f787a3a7b9581b8b88834229ec9fb8b50c045
62 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple invisible links pointing to suspicious domains, designed to trick the user into downloading a payload. The heuristic 'PDF_REPEATED_PAYLOAD_LINK_LURE' strongly indicates this malicious intent. While no scripts were directly extracted, the nature of the embedded links suggests a downloader or exploit delivery mechanism.

Machine Learning

  • Nyx PDF Classifier clean score 0.0039

Heuristics 2

  • Invisible/repeated PDF links deliver payload file critical PDF_REPEATED_PAYLOAD_LINK_LURE
    PDF uses invisible link annotations and points to a direct payload download. Repeated invisible links or lure-like payload names such as document/unlock/verify archives match malware-delivery PDF carriers where the page is only a prompt and the real payload is fetched from the linked URL.
  • 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://ratancefan.rujacki.ru/?dt&keyword=okcupid+premium+hack&charset=utf-8&source=weebly.com
    • http://ratancefan.trizok.ru/?dt&keyword=okcupid+premium+hack&charset=utf-8&source=weebly.com

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c0af.bin
d3da9de7daa860f637e4d1ed3fdbf9df618485546a86ceb3c64bda7255044a25
pdf-font-stream PDF embedded font (sfnt) at offset 0xC0AF 12152 bytes
font_01_sfnt_off0000e6d8.bin
618532b2b63605606933cfd58ddc9c315380c32578cccb08d7e0d56cac08e209
pdf-font-stream PDF embedded font (sfnt) at offset 0xE6D8 1440 bytes