Malicious PDF — malware analysis report

Static analysis result for SHA-256 6aa6ec3b9cf1f508…

MALICIOUS

PDF

45.0 KB Created: 2021-05-17 09:34:14 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: e7abaad59f3c33dd80a0f40886d4b5b8 SHA-1: 2b4e7da32b750a161beaf7f013b44e2f8262a5b8 SHA-256: 6aa6ec3b9cf1f508499023c8f238d9e4b2352df16f7b18fd761fb7e3f501783c
122 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. It uses a fake-CAPTCHA lure. The file routes users through malicious redirector infrastructure and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9632

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.
  • Fake CAPTCHA / human verification prompt high SE_FAKE_CAPTCHA
    Document displays a fake CAPTCHA or human-verification prompt — used to trick users into running commands or pressing keyboard shortcuts
  • 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 https://netcdn.xyz/app/406889139/free-spin-link-in-coin-master-game-hack PDF link annotation
    • http://elearning3.mtsn3subang.com/__statics/gudangsoal/files/master-coin-hack-apk_GM406889139.pdfIn PDF document text
    • http://elearning3.mtsn3subang.com/__statics/gudangsoal/files/how-to-hack-someones-roblox-account_GM431946152.pdfIn PDF document text
    • http://elearning3.mtsn3subang.com/__statics/gudangsoal/files/roblox-hack-apk_GM431946152.pdfIn PDF document text
    • http://elearning3.mtsn3subang.com/__statics/gudangsoal/files/minecraft-mod-updater_GM479516143.pdfIn PDF document text
    • http://elearning3.mtsn3subang.com/__statics/gudangsoal/files/fan-page-coin-master_GM406889139.pdfIn PDF document text
    • http://elearning3.mtsn3subang.com/__statics/gudangsoal/files/free-coin-link-coin-master_GM406889139.pdfIn PDF document text
    • http://elearning3.mtsn3subang.com/__statics/gudangsoal/files/coin-master-2021-free-spins-link-blogspot_GM406889139.pdfIn PDF document text
    • http://elearning3.mtsn3subang.com/__statics/gudangsoal/files/minecraft-windows-10-code-free_GM479516143.pdfIn PDF document text
    • http://elearning3.mtsn3subang.com/__statics/gudangsoal/files/how-to-get-creative-mode-in-minecraft-server-hack_GM479516143.pdfIn PDF document text
    • http://elearning3.mtsn3subang.com/__statics/gudangsoal/files/ios-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://elearning3.mtsn3subang.com/__statics/gudangsoal/files/coin-master-free-spins-link_GM406889139.pdfIn PDF document text
    • http://elearning3.mtsn3subang.com/__statics/gudangsoal/files/roblox-hacked-com-2021_GM431946152.pdfIn PDF document text
    • http://elearning3.mtsn3subang.com/__statics/gudangsoal/files/coin-master-free-in-app-purchases-jailbreak_GM406889139.pdfIn PDF document text
    • http://elearning3.mtsn3subang.com/__statics/gudangsoal/files/free-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://elearning3.mtsn3subang.com/__statics/gudangsoal/files/how-to-get-free-robux-instantly_GM431946152.pdfIn PDF document text
    • http://elearning3.mtsn3subang.com/__statics/gudangsoal/files/easy-ways-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://elearning3.mtsn3subang.com/__statics/gudangsoal/files/coin-master-hack-apk-download-for-android_GM406889139.pdfIn PDF document text
    • http://elearning3.mtsn3subang.com/__statics/gudangsoal/files/i-cant-get-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://elearning3.mtsn3subang.com/__statics/gudangsoal/files/can-you-get-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://elearning3.mtsn3subang.com/__statics/gudangsoal/files/how-to-get-free-robux-gift-cards_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004a50.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4A50 25188 bytes
SHA-256: ed7c6ab773ab81668e8e7d0a486d94076719895d2a0c8fb239f501598208c414
font_01_sfnt_off00008472.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8472 2840 bytes
SHA-256: 3fb127b764b9d10f5525bc4de5ec8316de704409ccb0cf21cff3ad8a30d11676
font_02_sfnt_off00008e24.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8E24 18056 bytes
SHA-256: 9fb71ab55abd0506da6f7933ed7cda54dc8da7215c998dcb2b5a6ec30af64764

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