Malicious PDF — malware analysis report

Static analysis result for SHA-256 d28d313f550897e3…

MALICIOUS

PDF

33.1 KB Created: 2021-07-04 17:24:11 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: e95866f5b13c1f9dc59ccd120f6dcae1 SHA-1: d26b1cdf986dc0d917d0577ef5fde94bd07ad810 SHA-256: d28d313f550897e3790086e98d6f1e6a4d2d5a7c9e1c4b6a92e99dc6bcbe1f0f
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 0.9980

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 http://netcdn.tw/app/431946152/free-roblox-generator-game-hack PDF link annotation
    • https://fridaytravelnepal.com/userfiles/files/coin-master-game-android-free-download_GM406889139.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/free-800-robux_GM431946152.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/no-robux_GM431946152.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/free-coin-master-spins_GM406889139.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/coin-master-download_GM406889139.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/free-simulator-script-roblox_GM431946152.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/free-minecraft-bedrock-server-hosting-24-7_GM479516143.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/buy-robux-free-2021_GM431946152.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/how-to-get-free-skins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/how-do-i-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/free-spin-coin-master-app-download_GM406889139.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/get-free-robux-now_GM431946152.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/free-webs-that-give-you-free-robux_GM431946152.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/minecraft-skins-download-free_GM479516143.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/free-tiktok-fans-no-verification-2021_GM835599320.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/how-do-you-hack-a-server-on-roblox_GM431946152.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/roblox-report-hacker_GM431946152.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/que-es-free-build-en-roblox_GM431946152.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/how-to-get-free-minecraft-skins_GM479516143.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/coin-master-hack-software_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_off00002d82.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2D82 21624 bytes
SHA-256: 1e6fc5f104b0e6e07a94055c36a122fdd1ca6e388926bd47cdf980b592d628d3
font_01_sfnt_off00005d25.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5D25 18752 bytes
SHA-256: 7a858cebcbb43583261fc6928f7757faac90e9e6cc2d406a534a148fe309e18e

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