Malicious PDF — malware analysis report

Static analysis result for SHA-256 f8a526d13c02a033…

MALICIOUS

PDF

45.8 KB Created: 2021-06-11 07:22:57 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 4688f920385a96d03d5ec7941112229e SHA-1: d3b31370f75b5bb49f31cc6f58a7ef50ece47d7d SHA-256: f8a526d13c02a033cd1bb4c71936460e518a63f5d5c2e923db63702ff4151374
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirectors and lures users with promises of game hacks and free currency. The ML classifier also flagged this PDF as malicious. The embedded URLs likely lead to further malicious content or malware downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9864

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.tw/app/431946152/robux-pastebin-hack-2021-game-hack In PDF document text
    • https://elearning.mtsn1balangan.sch.id/__statics/gudangsoal/files/free-robux-books_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn1balangan.sch.id/__statics/gudangsoal/files/roblox-free-top-hat_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn1balangan.sch.id/__statics/gudangsoal/files/free-coins-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://elearning.mtsn1balangan.sch.id/__statics/gudangsoal/files/get-free-robux-2021_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn1balangan.sch.id/__statics/gudangsoal/files/how-to-hack-teleport-a-player-in-roblox_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn1balangan.sch.id/__statics/gudangsoal/files/free-online-minecraft-server_GM479516143.pdfIn PDF document text
    • https://elearning.mtsn1balangan.sch.id/__statics/gudangsoal/files/minecraft-hack-client-download_GM479516143.pdfIn PDF document text
    • https://elearning.mtsn1balangan.sch.id/__statics/gudangsoal/files/roblox-mobile-money-cheats_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn1balangan.sch.id/__statics/gudangsoal/files/bunbun-girl-roblox-hacker_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn1balangan.sch.id/__statics/gudangsoal/files/roblox-jailbreak-red-boy-hack_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn1balangan.sch.id/__statics/gudangsoal/files/how-to-get-a-free-minecraft-server_GM479516143.pdfIn PDF document text
    • https://elearning.mtsn1balangan.sch.id/__statics/gudangsoal/files/how-to-play-minecraft-for-free_GM479516143.pdfIn PDF document text
    • https://elearning.mtsn1balangan.sch.id/__statics/gudangsoal/files/free-roblox-exploits_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn1balangan.sch.id/__statics/gudangsoal/files/minecraft-mods-download-free_GM479516143.pdfIn PDF document text
    • https://elearning.mtsn1balangan.sch.id/__statics/gudangsoal/files/free-robux-co_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn1balangan.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-without-verification-2021_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn1balangan.sch.id/__statics/gudangsoal/files/roblox-hack-me_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn1balangan.sch.id/__statics/gudangsoal/files/how-to-code-a-script-hack-for-roblox_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn1balangan.sch.id/__statics/gudangsoal/files/free-robux-giveaway_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn1balangan.sch.id/__statics/gudangsoal/files/how-to-get-free-money-on-lumber-tycoon-2-roblox_GM431946152.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_off00005242.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5242 26096 bytes
SHA-256: 67a5f688f3e21145580588409ae053a34bc3f73d676888e43a7b1620fe1a8f3e
font_01_sfnt_off00008e40.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8E40 19028 bytes
SHA-256: c36a88842484587ade777bcb8afdcbe658b5b7dd23c4a2fdf655fe2e29fcf8ba

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