Malicious PDF — malware analysis report

Static analysis result for SHA-256 a5f075d396375a12…

MALICIOUS

PDF

38.6 KB Created: 2021-05-23 18:51:53 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 1d6de2deae94e874c925e85bf0bc1c6a SHA-1: cd741228290b14de7039c02fe757613c71234340 SHA-256: a5f075d396375a12c6a4e11c561ef17f54eb071e17054a76581e0925cbe14253
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document employs a lure related to 'free Robux' and 'game hacks' to entice users. It contains multiple embedded links pointing to known malicious redirectors and potentially malicious PDF files hosted on `senvoigiatot.com`. The ML classifier also flagged this document as malicious, reinforcing the observed redirection and lure tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9476

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector critical PDF_GAME_HACK_REDIRECT_LURE
    PDF's clickable action targets a redirector of the form /app/<id>/<slug>-game-hack — the landing-page shape of a large SEO 'free spins / generator / game hack' lure family that funnels victims through rotating disposable hosts to a malware/scam payload. The multi-link variants also trip ML/link-farm rules; this catches the single-link variants that otherwise score clean. CRITICAL on its own: the /app/<id>/<slug>-game-hack path shape is unambiguous scam infra, and the host rotates so a host-list match can't be relied on.
  • 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 https://netcdn.xyz/app/431946152/games-that-give-you-free-robux-game-hack In PDF document text
    • https://senvoigiatot.com/public/upload/files/hack-coin-master-game-download_GM406889139.pdfIn PDF document text
    • https://senvoigiatot.com/public/upload/files/free-robux-no-verification-2021-android_GM431946152.pdfIn PDF document text
    • https://senvoigiatot.com/public/upload/files/free-robux-that-actually-works-2021_GM431946152.pdfIn PDF document text
    • https://senvoigiatot.com/public/upload/files/get-free-robux-com_GM431946152.pdfIn PDF document text
    • https://senvoigiatot.com/public/upload/files/coin-master-online-free-spin_GM406889139.pdfIn 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_off0000315d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x315D 28964 bytes
SHA-256: da47e71dfa8f48f5f4d4502bce6a347865d398c3ac130c81bed9f8de26d48d91
font_01_sfnt_off00007327.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7327 19168 bytes
SHA-256: c4d6735542cd49b50f18b2921f89e54fe5d8ee4af3f47c61005942af246faebd

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