Malicious PDF — malware analysis report

Static analysis result for SHA-256 eec99a4e1ed03ad3…

MALICIOUS

PDF

34.5 KB Created: 2021-07-07 09:41:32 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 7d83786ef5f6da9578b836d5a93af579 SHA-1: a4a74bb1240ad11379365121a2fd76018cda8e34 SHA-256: eec99a4e1ed03ad3708b508742e18341de333226d6741d9908f565e907660994
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a high-confidence heuristic flagging it as a game hack lure, directing users to a suspicious URL. The document body and extracted URLs reinforce this, indicating a phishing or malware distribution attempt. While no scripts were explicitly extracted, the nature of the lure suggests potential for further malicious actions upon clicking the link.

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/406889139/coin-master-free-coins-and-spins-link-game-hack PDF link annotation
    • https://lojasdoescritorio.com.br/ckfinder/userfiles/files/free-printable-roblox-images_GM431946152.pdfIn PDF document text
    • https://lojasdoescritorio.com.br/ckfinder/userfiles/files/online-coin-master-hack-here_GM406889139.pdfIn PDF document text
    • https://lojasdoescritorio.com.br/ckfinder/userfiles/files/how-to-get-free-spins-on-coin-master-without-verification_GM406889139.pdfIn PDF document text
    • https://lojasdoescritorio.com.br/ckfinder/userfiles/files/free-roblox-premium_GM431946152.pdfIn PDF document text
    • https://lojasdoescritorio.com.br/ckfinder/userfiles/files/code-for-free-robux-2021_GM431946152.pdfIn PDF document text
    • https://lojasdoescritorio.com.br/ckfinder/userfiles/files/daily-coin-master-spins_GM406889139.pdfIn PDF document text
    • https://lojasdoescritorio.com.br/ckfinder/userfiles/files/how-to-get-free-animation-in-roblox_GM431946152.pdfIn PDF document text
    • https://lojasdoescritorio.com.br/ckfinder/userfiles/files/free-robux-no-human-verification-2021-android_GM431946152.pdfIn PDF document text
    • https://lojasdoescritorio.com.br/ckfinder/userfiles/files/spin-link_GM406889139.pdfIn PDF document text
    • https://lojasdoescritorio.com.br/ckfinder/userfiles/files/roblox-hack-como-tener-robux-gratis-2021-nuevo-truco_GM431946152.pdfIn PDF document text
    • https://lojasdoescritorio.com.br/ckfinder/userfiles/files/app-store-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • https://lojasdoescritorio.com.br/ckfinder/userfiles/files/earn-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • https://lojasdoescritorio.com.br/ckfinder/userfiles/files/how-to-hack-on-apocalypse-rising-roblox_GM431946152.pdfIn PDF document text
    • https://lojasdoescritorio.com.br/ckfinder/userfiles/files/coin-master-free-spins-2021-apk_GM406889139.pdfIn PDF document text
    • https://lojasdoescritorio.com.br/ckfinder/userfiles/files/100-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • https://lojasdoescritorio.com.br/ckfinder/userfiles/files/free-roblox-accounts-usernames-and-passwords-2021_GM431946152.pdfIn PDF document text
    • https://lojasdoescritorio.com.br/ckfinder/userfiles/files/admin-commands-roblox-free-download_GM431946152.pdfIn PDF document text
    • https://lojasdoescritorio.com.br/ckfinder/userfiles/files/minecraft-free-download-linux_GM479516143.pdfIn PDF document text
    • https://lojasdoescritorio.com.br/ckfinder/userfiles/files/coin-master-hack-tool-ios_GM406889139.pdfIn PDF document text
    • https://lojasdoescritorio.com.br/ckfinder/userfiles/files/cual-es-el-hack-para-tener-robux-gratis-en-robolox_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
font_00_sfnt_off0000316a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x316A 22396 bytes
SHA-256: d41464b38c9b41f31b87e6eceefb9366ca9cb9c8551269a51b78692689e14bb7
font_01_sfnt_off00006370.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6370 18520 bytes
SHA-256: 4a00b74065c845a8261d6cc4e101dd5c2a388e973e7fc9ab28e7679a34d9d18b

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