Malicious PDF — malware analysis report

Static analysis result for SHA-256 08fb55c2c7f5d585…

MALICIOUS

PDF

44.6 KB Created: 2021-06-03 13:35:44 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 53cf18cce80d20d6eb748fb572e081a9 SHA-1: 10eee439d26ba58b239df2a22abf5f02e0b23f87 SHA-256: 08fb55c2c7f5d5859d847802cdf88d70453a3eb9c5e13acbc76fa3688ddbbcc1
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 0.9865

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.online/app/406889139/coin-master-free-spins-link-2021-game-hack PDF link annotation
    • http://pustakafpsi.uin-suska.ac.id/repository/coin-master-hack-2021-apk_GM406889139.pdfIn PDF document text
    • http://pustakafpsi.uin-suska.ac.id//repository/buy-robux-free_GM431946152.pdfIn PDF document text
    • http://pustakafpsi.uin-suska.ac.id/repository/minecraft-java-account-free_GM479516143.pdfIn PDF document text
    • http://pustakafpsi.uin-suska.ac.id//repository/how-to-get-free-robux-generator_GM431946152.pdfIn PDF document text
    • http://pustakafpsi.uin-suska.ac.id/repository/coin-master-heaven-daily-free-spins-link-today_GM406889139.pdfIn PDF document text
    • http://pustakafpsi.uin-suska.ac.id/repository/coin-master-game-legitimate-hack-without-signing-up-or-shareing_GM406889139.pdfIn PDF document text
    • http://pustakafpsi.uin-suska.ac.id//repository/how-to-get-2021-robux-for-free_GM431946152.pdfIn PDF document text
    • http://pustakafpsi.uin-suska.ac.id/repository/free-account-roblox-2021_GM431946152.pdfIn PDF document text
    • http://pustakafpsi.uin-suska.ac.id//repository/25-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://pustakafpsi.uin-suska.ac.id/repository/coin-master-hack-apk-no-fb-login_GM406889139.pdfIn PDF document text
    • http://pustakafpsi.uin-suska.ac.id/repository/coin-master-hack-cheat-generator-d_GM406889139.pdfIn PDF document text
    • http://pustakafpsi.uin-suska.ac.id//repository/coin-master-hack-apk-35-13_GM406889139.pdfIn PDF document text
    • http://pustakafpsi.uin-suska.ac.id//repository/how-to-change-your-username-on-roblox-for-free-2021_GM431946152.pdfIn PDF document text
    • http://pustakafpsi.uin-suska.ac.id/repository/coin-master-hack-apk-facebook-login_GM406889139.pdfIn PDF document text
    • http://pustakafpsi.uin-suska.ac.id/repository/is-coin-master-hack-safe_GM406889139.pdfIn PDF document text
    • http://pustakafpsi.uin-suska.ac.id/repository/coin-master-332-apk-free-download_GM406889139.pdfIn PDF document text
    • http://pustakafpsi.uin-suska.ac.id//repository/free-roblox-accounts-2021-with-robux_GM431946152.pdfIn PDF document text
    • http://pustakafpsi.uin-suska.ac.id//repository/roblox-sexually-abused_GM431946152.pdfIn PDF document text
    • http://pustakafpsi.uin-suska.ac.id//repository/free-daily-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://pustakafpsi.uin-suska.ac.id/repository/robux_GM431946152.pdfIn PDF document text
    • https://coinmasterspinandcoin.comIn 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_004_off000051bb.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x51BB 24904 bytes
SHA-256: c8af294d0b42eab368a14326d45fe161525f6dc7a7806f9595b3328691c30e93
font_01_sfnt_off00008b2e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8B2E 18456 bytes
SHA-256: 405c435adaafa0da304b7a4986d8f56c56dc87ed278d5cff2ac0c57977d8d7e3

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