Malicious PDF — malware analysis report

Static analysis result for SHA-256 95951d71fdb576e0…

MALICIOUS

PDF

33.6 KB Created: 2021-07-19 16:53:52 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 5a878ab2b4538004cb75e37979715646 SHA-1: 7bacc011972209137ab510e756c641d903e1425d SHA-256: 95951d71fdb576e0aafd186bb40347aed711fe3ac07eb739104da74dda0f8db1
160 Risk Score

Malware Insights

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

The PDF document contains multiple links to redirector infrastructure, specifically advertising 'free Robux' or 'game hacks' to lure users. The primary redirector URL is http://netcdn.tw/app/431946152/how-to-get-free-robux-without-verifying-2021-game-hack, which is associated with malicious activity. The document body and heuristics indicate a social engineering lure designed to trick users into visiting potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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 http://netcdn.tw/app/431946152/how-to-get-free-robux-without-verifying-2021-game-hack In PDF document text
    • http://floreswindows.com/images/roblox-fly-hack_GM431946152.pdfIn PDF document text
    • http://floreswindows.com/images/freer-pro-tiktok_GM835599320.pdfIn PDF document text
    • http://floreswindows.com/images/free-robux-games-that-actually-work_GM431946152.pdfIn PDF document text
    • http://floreswindows.com/images/free-robux-website_GM431946152.pdfIn PDF document text
    • http://floreswindows.com/images/free-tiktok-fans-and-likes_GM835599320.pdfIn PDF document text
    • http://floreswindows.com/images/how-do-you-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://floreswindows.com/images/how-to-get-free-likes-on-tiktok_GM835599320.pdfIn PDF document text
    • http://floreswindows.com/images/free-robux-codes-no-verification_GM431946152.pdfIn PDF document text
    • http://floreswindows.com/images/minecraft-pe-015-0-apk-free-download_GM479516143.pdfIn PDF document text
    • http://floreswindows.com/images/free-minecraft-survival-server_GM479516143.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_off0000295c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x295C 22648 bytes
SHA-256: 90d616dde59026a31f1038ec46f91dc7782c5fc080c5c56f83200d0cbdb17fda
font_01_sfnt_off00005c37.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5C37 19956 bytes
SHA-256: 0d7f08528f83f97708517a405845162dd759fca1405e28936b51461a2b6f80d9

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