Malicious PDF — malware analysis report

Static analysis result for SHA-256 b80b6260292973ad…

MALICIOUS

PDF

49.1 KB Created: 2021-06-03 08:35:59 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01
MD5: c401fc6331cb38e2ba05ebea03fbe64b SHA-1: 2e271d211cec28c4178e4c42889f4e53fa6df3ed SHA-256: b80b6260292973ad24dfbfaa554414333208aa4dcdaca99547e50372590dd67d
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 0.9796

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/431946152/free-robux-with-no-survey-game-hack PDF link annotation
    • https://library.sman1berau.sch.id/repository/free-robux-scams_GM431946152.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/free-robux-generator-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/wurst-client-download_GM479516143.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/minecraft-free-online-games_GM479516143.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/robux-free-c_GM431946152.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/free-coins-and-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/coin-master-free-link-2021_GM406889139.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/try-minecraft-free_GM479516143.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/is-minecraft-free-on-mac_GM479516143.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/how-to-get-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/links-to-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/coin-master-hack-spin_GM406889139.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/coin-master-free-cards-hack_GM406889139.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/free-robux-glitch_GM431946152.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/coin-master-computer-hack_GM406889139.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/free-minecraft-bedrock-server-hosting-24-7_GM479516143.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/hack-coin-master-using-cheat-engine_GM406889139.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/free-games-like-coin-master_GM406889139.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/coin-master-free-spins-link-facebook-page_GM406889139.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/google-coin-master-free-spins_GM406889139.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_off000050ca.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x50CA 26704 bytes
SHA-256: cc1ef127c4ecc27cab28a9cd0de21e9178b424e846515243875d5dcb1f6b69ce
font_01_sfnt_off00008eb9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8EB9 3884 bytes
SHA-256: 64ea6bfd232c3abde76d8b86727203bfa3f935a5783cd0c1f642cf6d3fb42b29
font_02_sfnt_off00009b61.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9B61 18896 bytes
SHA-256: c9a06fd84da7c680e9235c6c693ba85d62e2f793adf65e6d39442d95d7fb6fc9

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