Malicious PDF — malware analysis report

Static analysis result for SHA-256 7af361a4f53feb82…

MALICIOUS

PDF

28.4 KB Created: 2021-07-22 06:40:38 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: c0da905e508e0dd6be2ac399b5aeaf98 SHA-1: 671e62178d284d2d75bea940facc956636b1c6c1 SHA-256: 7af361a4f53feb82f6bf76d0fdc06408aeef3eafc1589199640574880f17154a
70 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains embedded text and a prominent link that mimics a 'Robux Generator' lure, directing users to a known malicious redirector. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' confirms this redirection to malicious infrastructure. While no scripts were directly extracted, the document's structure and content strongly suggest an attempt to trick users into visiting a malicious URL, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier clean score 0.0329

Heuristics 3

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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
  • 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://netcdn.tw/app/431946152/robloxmatch.com-free-robux-game-hack In PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00001c93.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1C93 21264 bytes
SHA-256: 27e40c8b7c40f1b416a54439e0fffa030d990a330f4242e1306cfd4b2cc85086
font_01_sfnt_off00004ae1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4AE1 19100 bytes
SHA-256: 320d93f3b8ec418dafe56a0ab761e37d2656ce3fae295c57a773b93fd475c835

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