Malicious PDF — malware analysis report

Static analysis result for SHA-256 348a7342d89f110c…

MALICIOUS

PDF

49.2 KB Created: 2021-06-03 14:25:24 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: da0e03c6425b0384c184905abc78bb3c SHA-1: 4162aef28789f84852890ac751f4ee82e109a1db SHA-256: 348a7342d89f110c0e77c47df48451a996fbdc5601591ab367d52187aec4b124
162 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF document employs a common lure, impersonating brands like Facebook and offering 'game hacks' or 'free generators' to trick users into clicking malicious links. The primary link, https://netcdn.online/app/406889139/coin-master-free-link-spin-game-hack, is designed to lead victims to credential harvesting pages or further malware. The document also contains embedded JavaScript, likely used to facilitate the redirection or exploit vulnerabilities, and the presence of a password-protected archive lure suggests an attempt to bypass security scanning.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9796

Heuristics 6

  • 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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • Brand-impersonation credential phishing lure high SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: call-to-action link host does not match the impersonated brand: https://netcdn.online/app/406889139/coin-master-free-link-spin-game-hack.
  • 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.online/app/406889139/coin-master-free-link-spin-game-hack PDF link annotation
    • http://katalog.gemalibrary.net/repository/send-me-500-2021-spins_GM406889139.pdfIn PDF document text
    • http://katalog.gemalibrary.net/repository/free-coin-master-game_GM406889139.pdfIn PDF document text
    • http://katalog.gemalibrary.net/repository/can-u-get-free-robux_GM431946152.pdfIn PDF document text
    • http://katalog.gemalibrary.net/repository/how-to-get-free-spins-on-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://katalog.gemalibrary.net/repository/free-roblox-passwords_GM431946152.pdfIn PDF document text
    • http://katalog.gemalibrary.net/repository/moon-active-games_GM406889139.pdfIn PDF document text
    • http://katalog.gemalibrary.net/repository/get-free-spins-coin-master-october-2021_GM406889139.pdfIn PDF document text
    • http://katalog.gemalibrary.net/repository/dominus-roblox-free_GM431946152.pdfIn PDF document text
    • http://katalog.gemalibrary.net/repository/free-spins-and-coins-coin-master_GM406889139.pdfIn PDF document text
    • http://katalog.gemalibrary.net/repository/coin-master-free-spins-and-coins-daily_GM406889139.pdfIn PDF document text
    • http://katalog.gemalibrary.net/repository/how-to-get-free-robux-without-verifying-2021_GM431946152.pdfIn PDF document text
    • http://katalog.gemalibrary.net/repository/best-minecraft-hacked-client-2021_GM479516143.pdfIn PDF document text
    • http://katalog.gemalibrary.net/repository/coin-master-32-hack-apk_GM406889139.pdfIn PDF document text
    • http://katalog.gemalibrary.net/repository/download-minecraft-free-hiapphere_GM479516143.pdfIn PDF document text
    • http://katalog.gemalibrary.net/repository/minecraft-gun-mod-download-free_GM479516143.pdfIn PDF document text
    • http://katalog.gemalibrary.net/repository/coin-master-gift-link-hack_GM406889139.pdfIn PDF document text
    • http://katalog.gemalibrary.net/repository/free-coin-master-spins-daily_GM406889139.pdfIn PDF document text
    • http://katalog.gemalibrary.net/repository/coin-master-guide-to-free-spins-and-rewards_GM406889139.pdfIn PDF document text
    • http://katalog.gemalibrary.net/repository/coin-master-hack-mod-apk-android-1_GM406889139.pdfIn PDF document text
    • http://katalog.gemalibrary.net/repository/free-minecraft-videos_GM479516143.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_004_off00004f6a.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4F6A 26380 bytes
SHA-256: 292b9ce807750cc9494c415e853077bd7956fc97e5b65447f81dc3c75c744df5
font_01_sfnt_off00008c30.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8C30 7332 bytes
SHA-256: d811e0aca85f3b94c42cd1240eec68b8eb378f3d8be5e408d3f6abd0f11f834d
font_02_sfnt_off00009e49.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9E49 18056 bytes
SHA-256: 73446086b7970e4c311ea7edd0e96fe93bb69e7a29ec1c6c70349cef1a9e8050

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