Malicious PDF — malware analysis report

Static analysis result for SHA-256 a0a07297de9752d6…

MALICIOUS

PDF

35.9 KB Created: 2021-07-06 08:58:32 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 923c8bd792cc4025be471f38bc3a0275 SHA-1: d3174cf2df470cfa34122fa1c616e3e9593597d8 SHA-256: a0a07297de9752d68af36296e4f7ef8578b10aae5c30b86bbf9cf435291adf9e
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 0.9980

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/gamehunters-club-coin-master-game-hack PDF link annotation
    • https://pustaka.mic.sch.id/repository/rocash-earn-free-robux_GM431946152.pdfIn PDF document text
    • https://pustaka.mic.sch.id//repository/robux-hack-no-verification_GM431946152.pdfIn PDF document text
    • https://pustaka.mic.sch.id/repository/roblox-shirt-template-png-free-shipping_GM431946152.pdfIn PDF document text
    • https://pustaka.mic.sch.id//repository/how-to-change-roblox-username-for-free_GM431946152.pdfIn PDF document text
    • https://pustaka.mic.sch.id/repository/free-robux-games-without-password_GM431946152.pdfIn PDF document text
    • https://pustaka.mic.sch.id/repository/robux-hack-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • https://pustaka.mic.sch.id/repository/robux-party-com-for-robux-free_GM431946152.pdfIn PDF document text
    • https://pustaka.mic.sch.id/repository/free-private-server-roblox_GM431946152.pdfIn PDF document text
    • https://pustaka.mic.sch.id/repository/minecraft-story-mode-free_GM479516143.pdfIn PDF document text
    • https://pustaka.mic.sch.id//repository/how-to-get-minecraft-java-edition-for-free_GM479516143.pdfIn PDF document text
    • https://pustaka.mic.sch.id//repository/easy-ways-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://pustaka.mic.sch.id/repository/how-to-get-free-robux-with-a-code_GM431946152.pdfIn PDF document text
    • https://pustaka.mic.sch.id/repository/how-to-hack-on-vehicle-simulator-roblox_GM431946152.pdfIn PDF document text
    • https://pustaka.mic.sch.id//repository/how-to-get-free-robux-without-email_GM431946152.pdfIn PDF document text
    • https://pustaka.mic.sch.id/repository/how-to-earn-free-robux-in-roblox_GM431946152.pdfIn PDF document text
    • https://pustaka.mic.sch.id//repository/free-robux-gift-card_GM431946152.pdfIn PDF document text
    • https://pustaka.mic.sch.id/repository/hack-roblox-jailbreak-money-2021_GM431946152.pdfIn PDF document text
    • https://pustaka.mic.sch.id/repository/roblox-cheats-on-girlfriend_GM431946152.pdfIn PDF document text
    • https://pustaka.mic.sch.id//repository/free-coins-for-flip-master_GM406889139.pdfIn PDF document text
    • https://pustaka.mic.sch.id/repository/free-robux-advertisment-site_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
stream_002_off0000357a.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x357A 22924 bytes
SHA-256: 69983aa1c7e821f72213fe62c09b9fd275d1372c65874f2f5afa831f6ea2b347
font_01_sfnt_off00006902.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6902 18632 bytes
SHA-256: 30b5ac21c6a93ecf49da73b5010e4d04aa7628586d8166660ea0a2d873e7b76c

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