Malicious PDF — malware analysis report

Static analysis result for SHA-256 b4b63d069293112b…

MALICIOUS

PDF

35.1 KB Created: 2021-07-02 02:18:24 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: fc3cfb956155754ca3c96113c5bc557e SHA-1: b992220b88261d28a3c12a53d6c84e5994483452 SHA-256: b4b63d069293112ba12b5afd9837c173cd58e8c55bd844ec035b2702b7817dbb
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 'game hacks' and 'free generators' for Roblox. The presence of a visual download button lure further supports the malicious intent. The primary URL identified, http://netcdn.co/app/431946152/tutorial-hack-roblox-game-hack, is flagged as a known malicious redirector, indicating a likely phishing or scam campaign.

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/tutorial-hack-roblox-game-hack In PDF document text
    • https://lms.mtsn3trenggalek.sch.id/__statics/gudangsoal/files/tix-factory-tycoon-paquet-tix-roblox-cheat_GM431946152.pdfIn PDF document text
    • https://lms.mtsn3trenggalek.sch.id/__statics/gudangsoal/files/free-roblox-stampycat-tshirts_GM431946152.pdfIn PDF document text
    • https://lms.mtsn3trenggalek.sch.id/__statics/gudangsoal/files/how-to-get-free-sounds-on-roblox_GM431946152.pdfIn PDF document text
    • https://lms.mtsn3trenggalek.sch.id/__statics/gudangsoal/files/free-robux-2021-october_GM431946152.pdfIn PDF document text
    • https://lms.mtsn3trenggalek.sch.id/__statics/gudangsoal/files/free-robux-thumbnail_GM431946152.pdfIn PDF document text
    • https://lms.mtsn3trenggalek.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-really-fast-and-easy_GM431946152.pdfIn PDF document text
    • https://lms.mtsn3trenggalek.sch.id/__statics/gudangsoal/files/free-robux-websites-2021_GM431946152.pdfIn PDF document text
    • https://lms.mtsn3trenggalek.sch.id/__statics/gudangsoal/files/sign-up-for-roblox-for-free-safe_GM431946152.pdfIn PDF document text
    • https://lms.mtsn3trenggalek.sch.id/__statics/gudangsoal/files/como-hackear-cuentas-roblox_GM431946152.pdfIn PDF document text
    • https://lms.mtsn3trenggalek.sch.id/__statics/gudangsoal/files/is-minecraft-dungeons-free_GM479516143.pdfIn PDF document text
    • https://lms.mtsn3trenggalek.sch.id/__statics/gudangsoal/files/free-roblox-accounts-with-robux-that-work-2021_GM431946152.pdfIn PDF document text
    • https://lms.mtsn3trenggalek.sch.id/__statics/gudangsoal/files/roblox-free-boombox-island_GM431946152.pdfIn PDF document text
    • https://lms.mtsn3trenggalek.sch.id/__statics/gudangsoal/files/guuuddinfo-online-hack-for-robux_GM431946152.pdfIn PDF document text
    • https://lms.mtsn3trenggalek.sch.id/__statics/gudangsoal/files/get-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://lms.mtsn3trenggalek.sch.id/__statics/gudangsoal/files/roblox-hack-2021_GM431946152.pdfIn PDF document text
    • https://lms.mtsn3trenggalek.sch.id/__statics/gudangsoal/files/roblox-eclipsis-hack_GM431946152.pdfIn PDF document text
    • https://lms.mtsn3trenggalek.sch.id/__statics/gudangsoal/files/free-roblox-skywars_GM431946152.pdfIn PDF document text
    • https://lms.mtsn3trenggalek.sch.id/__statics/gudangsoal/files/let-me-play-roblox-for-free_GM431946152.pdfIn PDF document text
    • https://lms.mtsn3trenggalek.sch.id/__statics/gudangsoal/files/e-free-roblox-wiki_GM431946152.pdfIn PDF document text
    • https://lms.mtsn3trenggalek.sch.id/__statics/gudangsoal/files/coin-master-free-spins-and-coins-blogspot_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_off000031eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x31EB 22472 bytes
SHA-256: bca767ef90c80895d1da1263603df25961c1402188e841b61bb15e3b8e6e646c
font_01_sfnt_off0000641b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x641B 19020 bytes
SHA-256: fef2d3b24bb5f281c19939d3f5963b8ebb464eccdb08324dc5a27da6cebd607f

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