Malicious PDF — malware analysis report

Static analysis result for SHA-256 ea99a87f04d9fe6c…

MALICIOUS

PDF

35.0 KB Created: 2021-07-09 18:28:06 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: c5cf78ff21277446e98bb9349bf91c51 SHA-1: 4dcff385cf3cbf95d875097977173a78beae9c2d SHA-256: ea99a87f04d9fe6c571f383f0f9f17d6dabc2bcee865dc8e4945ebb066900942
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains embedded links that redirect to a known malicious infrastructure, specifically advertising 'free generator / game hack' content. The document body and heuristics strongly suggest a lure for users seeking in-game currency or cheats, which is a common social engineering tactic. The primary IOC is the malicious redirector URL.

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.tw/app/431946152/how-do-i-get-robux-on-roblox-game-hack In PDF document text
    • https://elearning.mtsn3kotabjm.sch.id/__statics/gudangsoal/files/robuxy-com-free-robux_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn3kotabjm.sch.id/__statics/gudangsoal/files/how-do-you-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn3kotabjm.sch.id/__statics/gudangsoal/files/tower-of-hell-roblox-hack_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn3kotabjm.sch.id/__statics/gudangsoal/files/minecraft-mobile-free_GM479516143.pdfIn PDF document text
    • https://elearning.mtsn3kotabjm.sch.id/__statics/gudangsoal/files/how-to-get-free-coins-and-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://elearning.mtsn3kotabjm.sch.id/__statics/gudangsoal/files/minecraft-bedrock-hacks_GM479516143.pdfIn PDF document text
    • https://elearning.mtsn3kotabjm.sch.id/__statics/gudangsoal/files/minecraft-pe-free-download-ios-no-jailbreak_GM479516143.pdfIn PDF document text
    • https://elearning.mtsn3kotabjm.sch.id/__statics/gudangsoal/files/coin-master-spin-and-coins-free_GM406889139.pdfIn PDF document text
    • https://elearning.mtsn3kotabjm.sch.id/__statics/gudangsoal/files/free-roblox-hair-codes_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn3kotabjm.sch.id/__statics/gudangsoal/files/pubg-500-uc-price_GM1330123889.pdfIn PDF document text
    • https://elearning.mtsn3kotabjm.sch.id/__statics/gudangsoal/files/free-robux-app_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn3kotabjm.sch.id/__statics/gudangsoal/files/coin-master-village-3_GM406889139.pdfIn PDF document text
    • https://elearning.mtsn3kotabjm.sch.id/__statics/gudangsoal/files/minecraft-bedrock-free-server-hosting_GM479516143.pdfIn PDF document text
    • https://elearning.mtsn3kotabjm.sch.id/__statics/gudangsoal/files/coin-master-free-spin-daily-bonus_GM406889139.pdfIn PDF document text
    • https://elearning.mtsn3kotabjm.sch.id/__statics/gudangsoal/files/20210-free-spin-links-for-coin-master_GM406889139.pdfIn PDF document text
    • https://elearning.mtsn3kotabjm.sch.id/__statics/gudangsoal/files/hack-para-robux-real_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn3kotabjm.sch.id/__statics/gudangsoal/files/free-robux-exe_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn3kotabjm.sch.id/__statics/gudangsoal/files/robux-hack-2021_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn3kotabjm.sch.id/__statics/gudangsoal/files/coin-master-free-spins-hack-download_GM406889139.pdfIn PDF document text
    • https://elearning.mtsn3kotabjm.sch.id/__statics/gudangsoal/files/free-spins-on-coin-master-links-2021_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_off00003193.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3193 22408 bytes
SHA-256: a18b561d92c9ee6470ca60d77b4ae185a3e8cab28ce897e9c1dea25335db3766
font_01_sfnt_off0000635f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x635F 19060 bytes
SHA-256: b0fa18733e6a070784d304436149cec6c427497940c18f93e8b4c16e88d08469

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