Malicious PDF — malware analysis report

Static analysis result for SHA-256 ff8f28d66cb99d98…

MALICIOUS

PDF

34.9 KB Created: 2021-06-28 21:36:14 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 486a7a4e57033f5a00967cc6cd484a4d SHA-1: b797c9f11b4e76293ca39fb33734ae29e8d01a13 SHA-256: ff8f28d66cb99d98be3592913967a44ffd04bd1d6b2902f5ef83b4eb7001c0ee
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links that redirect to malicious infrastructure, specifically promoting 'game hacks' for Roblox. The primary lure URL is http://netcdn.co/app/431946152/how-to-use-hack-in-roblox-game-hack, which is flagged as a malicious redirector. The document body and embedded URLs reinforce this theme, suggesting a phishing or scam attempt to trick users into visiting potentially harmful sites. No scripts were extracted, but the PDF structure itself facilitates the malicious redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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.co/app/431946152/how-to-use-hack-in-roblox-game-hack In PDF document text
    • https://www.elearning.mtsn2tala.sch.id/__statics/gudangsoal/files/how-to-hack-a-roblox-account-2021_GM431946152.pdfIn PDF document text
    • http://elearning.mtsn2tala.sch.id/__statics/gudangsoal/files/free-roblox-clothes-codes_GM431946152.pdfIn PDF document text
    • http://elearning.mtsn2tala.sch.id/__statics/gudangsoal/files/www-roblox-free-rewards_GM431946152.pdfIn PDF document text
    • https://www.elearning.mtsn2tala.sch.id/__statics/gudangsoal/files/free-robux-working_GM431946152.pdfIn PDF document text
    • http://elearning.mtsn2tala.sch.id/__statics/gudangsoal/files/how-to-get-admin-for-free-on-roblox_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn2tala.sch.id/__statics/gudangsoal/files/are-robux-hacks-real_GM431946152.pdfIn PDF document text
    • http://elearning.mtsn2tala.sch.id/__statics/gudangsoal/files/cheat-engine-speed-hack-roblox-2021_GM431946152.pdfIn PDF document text
    • http://elearning.mtsn2tala.sch.id/__statics/gudangsoal/files/free-robux-discord_GM431946152.pdfIn PDF document text
    • http://elearning.mtsn2tala.sch.id/__statics/gudangsoal/files/free-roblox-script-hub_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn2tala.sch.id/__statics/gudangsoal/files/best-free-masks-in-roblox_GM431946152.pdfIn PDF document text
    • https://www.elearning.mtsn2tala.sch.id/__statics/gudangsoal/files/working-free-robux-server_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn2tala.sch.id/__statics/gudangsoal/files/robux-secret-forum-hack_GM431946152.pdfIn PDF document text
    • https://www.elearning.mtsn2tala.sch.id/__statics/gudangsoal/files/free-robux-2021-hack-pc_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn2tala.sch.id/__statics/gudangsoal/files/wie-kann-man-ihn-roblox-hacken-um-robaks_GM431946152.pdfIn PDF document text
    • https://www.elearning.mtsn2tala.sch.id/__statics/gudangsoal/files/free-robux-promo-codes-2021-not-expired_GM431946152.pdfIn PDF document text
    • http://elearning.mtsn2tala.sch.id/__statics/gudangsoal/files/free-100-robux_GM431946152.pdfIn PDF document text
    • https://www.elearning.mtsn2tala.sch.id/__statics/gudangsoal/files/how-to-hack-someones-roblox-account-2021_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn2tala.sch.id/__statics/gudangsoal/files/how-do-you-get-free-robux-in-roblox-2021_GM431946152.pdfIn PDF document text
    • http://elearning.mtsn2tala.sch.id/__statics/gudangsoal/files/how-to-hack-roblox-model-not-for-sell_GM431946152.pdfIn PDF document text
    • http://elearning.mtsn2tala.sch.id/__statics/gudangsoal/files/how-to-get-minecraft-java-for-free_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_off0000325f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x325F 22340 bytes
SHA-256: 5436853e34e72d0d5b3e3207519015ea5e8635fa38c45f14e772740c12735877
font_01_sfnt_off000063c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x63C9 18820 bytes
SHA-256: 9b33e01fc3841e2c90e3ef4be92efeda0636a94cc8e7bb56b85dfd90078f3247

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