Malicious PDF — malware analysis report

Static analysis result for SHA-256 2631cfab0794a681…

MALICIOUS

PDF

35.4 KB Created: 2021-07-03 13:21:13 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-17
MD5: a66a11bee681b62e44b59f473814bfc9 SHA-1: ab469b4b2256523755aebe6126f63d5a341e0ccf SHA-256: 2631cfab0794a68191feb32368a287f077b59c17a98c58a000d031201793262c
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a high-severity heuristic indicating it links to a game hack redirector, specifically pointing to 'http://netcdn.tw/app/406889139/coin-master-hack-tool-2021-game-hack'. The document body also contains this URL and other similar lures for game cheats and currency. This suggests the primary goal is to trick users into visiting a potentially malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 5

  • PDF links to a 'free generator / game hack' redirector high 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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/406889139/coin-master-hack-tool-2021-game-hack PDF link annotation
    • https://elearning.mtsn3mojokerto.sch.id/__statics/gudangsoal/files/how-do-you-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn3mojokerto.sch.id/__statics/gudangsoal/files/freerobux-co_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn3mojokerto.sch.id/__statics/gudangsoal/files/free-robux-generator-com-roblox-hack_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn3mojokerto.sch.id/__statics/gudangsoal/files/coin-master-spin-hack-pc_GM406889139.pdfIn PDF document text
    • https://elearning.mtsn3mojokerto.sch.id/__statics/gudangsoal/files/who-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn3mojokerto.sch.id/__statics/gudangsoal/files/microsoft-rewards-robux_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn3mojokerto.sch.id/__statics/gudangsoal/files/you-get-free-robux_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn3mojokerto.sch.id/__statics/gudangsoal/files/how-to-hack-someones-roblox-account_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn3mojokerto.sch.id/__statics/gudangsoal/files/free-robux-hack-on-phone-no-human-verification_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn3mojokerto.sch.id/__statics/gudangsoal/files/minecraft-pocket-edition-free-apk_GM479516143.pdfIn PDF document text
    • https://elearning.mtsn3mojokerto.sch.id/__statics/gudangsoal/files/tiktok-views-free_GM835599320.pdfIn PDF document text
    • https://elearning.mtsn3mojokerto.sch.id/__statics/gudangsoal/files/wurst-mc_GM479516143.pdfIn PDF document text
    • https://elearning.mtsn3mojokerto.sch.id/__statics/gudangsoal/files/coin-master-hack-ios-10_GM406889139.pdfIn PDF document text
    • https://elearning.mtsn3mojokerto.sch.id/__statics/gudangsoal/files/coin-master-hack-apk-2021-download_GM406889139.pdfIn PDF document text
    • https://elearning.mtsn3mojokerto.sch.id/__statics/gudangsoal/files/free-roblox-dll_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn3mojokerto.sch.id/__statics/gudangsoal/files/microsoft-bing-free-robux_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn3mojokerto.sch.id/__statics/gudangsoal/files/coin-master-cards-free_GM406889139.pdfIn PDF document text
    • https://elearning.mtsn3mojokerto.sch.id/__statics/gudangsoal/files/toolbox-for-minecraft-pe-mod-apk_GM479516143.pdfIn PDF document text
    • https://elearning.mtsn3mojokerto.sch.id/__statics/gudangsoal/files/do-you-get-windows-10-minecraft-for-free-with-java_GM479516143.pdfIn PDF document text
    • https://elearning.mtsn3mojokerto.sch.id/__statics/gudangsoal/files/wwwroblox-hacks-for-robux-easy_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off00003407.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3407 22812 bytes
SHA-256: 0d95da460e25be8d316ab3cf12a4851ff32b5bfe79bf677bd4fd32f0304a150d
font_01_sfnt_off0000671f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x671F 18480 bytes
SHA-256: 3dc977bc1210ceeedde7f87719dab6f525ca5e29bcd32cbe92ee8e1a0ab21cbd

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