Malicious PDF — malware analysis report

Static analysis result for SHA-256 832ac35e014a4da7…

MALICIOUS

PDF

48.6 KB Created: 2021-06-03 12:04:20 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 8268204ba36dda49b41a4bc8c52cdd3a SHA-1: 23371b8e419d3ef719ea7b84f404f9bcda3b6efd SHA-256: 832ac35e014a4da7b682f6494c437ed2768efb5e96727e6ed2822cce28fcb98d
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/406889139/coin-master-daily-free-cards-game-hack PDF link annotation
    • https://elibrary.ikhac.ac.id/repository/free-robux-generator-2021_GM431946152.pdfIn PDF document text
    • https://elibrary.ikhac.ac.id/repository/rewards-roblox-com_GM431946152.pdfIn PDF document text
    • https://elibrary.ikhac.ac.id/repository/coin-master-free-coins-link_GM406889139.pdfIn PDF document text
    • https://elibrary.ikhac.ac.id/repository/coin-master-daily-free-spins-link-facebook_GM406889139.pdfIn PDF document text
    • https://elibrary.ikhac.ac.id/repository/daily-free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://elibrary.ikhac.ac.id/repository/daily-coin-master-link_GM406889139.pdfIn PDF document text
    • https://elibrary.ikhac.ac.id/repository/coin-master-free-gift-cards_GM406889139.pdfIn PDF document text
    • https://elibrary.ikhac.ac.id/repository/windows-10-minecraft-free-with-java_GM479516143.pdfIn PDF document text
    • https://elibrary.ikhac.ac.id/repository/free-minecraft-server-maker_GM479516143.pdfIn PDF document text
    • https://elibrary.ikhac.ac.id/repository/how-to-get-free-robux-without-offers_GM431946152.pdfIn PDF document text
    • https://elibrary.ikhac.ac.id/repository/free-tiktok-coins-2021_GM835599320.pdfIn PDF document text
    • https://elibrary.ikhac.ac.id/repository/free-robux-real_GM431946152.pdfIn PDF document text
    • https://elibrary.ikhac.ac.id/repository/coin-master-free-coins-and-spins-app_GM406889139.pdfIn PDF document text
    • https://elibrary.ikhac.ac.id/repository/minecraft-free-install_GM479516143.pdfIn PDF document text
    • https://elibrary.ikhac.ac.id/repository/100-robux_GM431946152.pdfIn PDF document text
    • https://elibrary.ikhac.ac.id/repository/free-robux-codes-2021_GM431946152.pdfIn PDF document text
    • https://elibrary.ikhac.ac.id/repository/no-scam-free-robux_GM431946152.pdfIn PDF document text
    • https://elibrary.ikhac.ac.id/repository/free-spins-on-coin-master-game_GM406889139.pdfIn PDF document text
    • https://elibrary.ikhac.ac.id/repository/free-robux-accounts_GM431946152.pdfIn PDF document text
    • https://elibrary.ikhac.ac.id/repository/minecraft-diamond-finder-hack_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_off00005419.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5419 26720 bytes
SHA-256: 775c0f9fb5ba4554fe3b8ffa651af28e0c41713756239039aa515c1be1115f14
font_01_sfnt_off00009195.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9195 2840 bytes
SHA-256: 30dce2b9c1950da345d7fed8f00c38887adfa2f2ddecc31775af2315e819ac37
font_02_sfnt_off00009b48.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9B48 18308 bytes
SHA-256: 0f25ff19bbb96414be395e76d71be840701757741be7b1a455de3e70536cac98

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