Malicious PDF — malware analysis report

Static analysis result for SHA-256 2578a9edb16da849…

MALICIOUS

PDF

44.6 KB Created: 2021-06-09 01:11:59 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01
MD5: db0fc4a447cc8ff8535491d1d8bfe8f5 SHA-1: 280b9346cc413b799e21810bdeb2ecea8455e30a SHA-256: 2578a9edb16da849bd95dc6a6a68acbeef7dc14a2995905c7de005871dd89427
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.tw/app/431946152/how-to-use-speed-hacks-in-roblox-game-hack PDF link annotation
    • https://library.sman1berau.sch.id/repository/roblox-its-free-trailer_GM431946152.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/free-roblox-clothes_GM431946152.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/free-robux-generator-codes_GM431946152.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/minecraft-pe-free-download-ios-no-jailbreak_GM479516143.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/coin-master-100-spin_GM406889139.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/buxblast-com-robux_GM431946152.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/tiktok-free-wala_GM835599320.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/sites-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/coin-master-free-spin-and-coin_GM406889139.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/minecraft-pocket-apk_GM479516143.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/minecraft-download-free-download_GM479516143.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/hack-pokemon-go-free-download_GM1094591345.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/roblox-free-items-glitch_GM431946152.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/how-to-get-free-shirts-on-roblox_GM431946152.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/how-to-block-someone-on-coin-master_GM406889139.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/robux-hack-generator_GM431946152.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/free-coin-link-coin-master_GM406889139.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/coin-master-in-app-purchase-hack_GM406889139.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/do-you-get-minecraft-windows-10-for-free_GM479516143.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/pixies-gigantic-coin-master-free-spins-and-coins_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_off00005122.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5122 24928 bytes
SHA-256: 497ff9f6d64277824c44092b6a1289de77a158463de6ba17b6b9abf9b2d412b0
font_01_sfnt_off000089e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x89E4 18884 bytes
SHA-256: 6db15ad8649f797b4a9df58276818b3cef42125a8e21119acbb472cc8b245677

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