Malicious PDF — malware analysis report

Static analysis result for SHA-256 813d86a587cddceb…

MALICIOUS

PDF

43.5 KB Created: 2021-05-11 20:40:58 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 323d8948aa5f8a11143d60b32eb439b9 SHA-1: 62f9ab88cbd260e21a1ef3ac9b00dbca25c95fd6 SHA-256: 813d86a587cddcebcff84f405c001d801574d9586a11be6a4456733836afa40b
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. 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 0.9969

Heuristics 4

  • 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.
  • 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/479516143/minecraft-building-hacks-game-hack PDF link annotation
    • https://elearning.mtsn1enrekang.com/__statics/gudangsoal/files/roblox-but_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn1enrekang.com/__statics/gudangsoal/files/free-robux-no-apps_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn1enrekang.com/__statics/gudangsoal/files/get-free-robux-com_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn1enrekang.com/__statics/gudangsoal/files/coin-master-free-spins-and-coins-daily_GM406889139.pdfIn PDF document text
    • https://elearning.mtsn1enrekang.com/__statics/gudangsoal/files/free-roblox-adopt-me-pets_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn1enrekang.com/__statics/gudangsoal/files/mobihack-roblox-hack_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn1enrekang.com/__statics/gudangsoal/files/how-to-get-free-spins-and-coins-in-coin-master_GM406889139.pdfIn PDF document text
    • https://elearning.mtsn1enrekang.com/__statics/gudangsoal/files/how-do-you-get-free-robux-without-doing-anything_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn1enrekang.com/__statics/gudangsoal/files/free-robux-games-that-actually-work_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn1enrekang.com/__statics/gudangsoal/files/coin-master-hack-spin-ios_GM406889139.pdfIn PDF document text
    • https://elearning.mtsn1enrekang.com/__statics/gudangsoal/files/free-roblox-animations_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn1enrekang.com/__statics/gudangsoal/files/coin-master-daily-free-spin-app_GM406889139.pdfIn PDF document text
    • https://elearning.mtsn1enrekang.com/__statics/gudangsoal/files/free-minecraft-resource-packs_GM479516143.pdfIn PDF document text
    • https://elearning.mtsn1enrekang.com/__statics/gudangsoal/files/can-you-still-get-minecraft-windows-10-for-free_GM479516143.pdfIn PDF document text
    • https://elearning.mtsn1enrekang.com/__statics/gudangsoal/files/minecraft-free-ios-2021_GM479516143.pdfIn PDF document text
    • https://elearning.mtsn1enrekang.com/__statics/gudangsoal/files/best-free-minecraft-texture-packs_GM479516143.pdfIn PDF document text
    • https://elearning.mtsn1enrekang.com/__statics/gudangsoal/files/free-coins-coin-master-blog_GM406889139.pdfIn PDF document text
    • https://elearning.mtsn1enrekang.com/__statics/gudangsoal/files/roblox-redeem_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn1enrekang.com/__statics/gudangsoal/files/coin-master-claim-free-spins_GM406889139.pdfIn PDF document text
    • https://elearning.mtsn1enrekang.com/__statics/gudangsoal/files/roblox40com-robux_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
stream_003_off00004d26.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4D26 25860 bytes
SHA-256: e8b1ccacc02e57ce25df65bc6aba0c4b543cb6209ac2d6923466cab933da7598
font_01_sfnt_off0000870c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x870C 18628 bytes
SHA-256: 03be4b6b10a4c687c6c89c16a3bf013511456428a76c01e3ee63370f4522cf94

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