Malicious PDF — malware analysis report

Static analysis result for SHA-256 755be13b85bc7880…

MALICIOUS

PDF

48.5 KB Created: 2021-05-15 00:40:34 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 127304897ec60a4d0995c2c56e33b88d SHA-1: 1d081448a6d01f874c22ee03ab9983591253e186 SHA-256: 755be13b85bc78804b325991c1ce1eb5b0f55e39e4442c39cd87d39aa99aa157
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains embedded links that redirect to malicious infrastructure, specifically promoting 'free Robux' and game hacks. The document body and heuristics indicate a lure designed to trick users into clicking these links. While no scripts were explicitly extracted, the PDF structure and embedded URLs strongly suggest a malicious redirection workflow, likely intended to download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8715

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/free-robux-pins-game-hack In PDF document text
    • http://studentslovetravel.com/images/how-to-hack-in-arsenal_GM431946152.pdfIn PDF document text
    • http://studentslovetravel.com/images/is-windows-10-minecraft-free_GM479516143.pdfIn PDF document text
    • http://studentslovetravel.com/images/cheats-coin-master-free_GM406889139.pdfIn PDF document text
    • http://studentslovetravel.com/images/free-robux-no-email_GM431946152.pdfIn PDF document text
    • http://studentslovetravel.com/images/coin-master-hack-android-2021_GM406889139.pdfIn PDF document text
    • http://studentslovetravel.com/images/coin-master-35-16-hack-apk_GM406889139.pdfIn PDF document text
    • http://studentslovetravel.com/images/roblox-free-skin_GM431946152.pdfIn PDF document text
    • http://studentslovetravel.com/images/links-for-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://studentslovetravel.com/images/easy-how-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://studentslovetravel.com/images/how-do-u-get-free-robux_GM431946152.pdfIn PDF document text
    • http://studentslovetravel.com/images/free-robux-gift-card-generator_GM431946152.pdfIn PDF document text
    • http://studentslovetravel.com/images/master-coin-free-spin_GM406889139.pdfIn PDF document text
    • http://studentslovetravel.com/images/coin-master-update-2021_GM406889139.pdfIn PDF document text
    • http://studentslovetravel.com/images/how-to-hack-golden-card-in-coin-master_GM406889139.pdfIn PDF document text
    • http://studentslovetravel.com/images/master-coin-master-free-spin_GM406889139.pdfIn PDF document text
    • http://studentslovetravel.com/images/can-you-get-robux-for-free_GM431946152.pdfIn PDF document text
    • http://studentslovetravel.com/images/how-to-get-free-roebucks-in-roblox_GM431946152.pdfIn PDF document text
    • http://studentslovetravel.com/images/cm-spin-link_GM406889139.pdfIn PDF document text
    • http://studentslovetravel.com/images/coin-master-daily-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • http://studentslovetravel.com/images/how-to-get-free-robux-easy-hack_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004981.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4981 26076 bytes
SHA-256: 1377827ebff6da38b00363d20e5603309d3b11a44db34b9c170c4f701c15eb3d
font_01_sfnt_off00008441.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8441 2940 bytes
SHA-256: eb230542719c96b42e3fd8bb01e35f13ebd5f02629049da3a58e7fd7607bf48a
font_02_sfnt_off00008e4b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8E4B 5596 bytes
SHA-256: 9a13c2580265a78e8a7257496a31ee0055738af7e20a5661c2902efe4bf05ce5
font_03_sfnt_off00009af3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9AF3 18288 bytes
SHA-256: be7609bd7ddc69eb994b080447c8f3e95bc75a4b3676ce3cbb6c2619f3d9524c

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