Malicious PDF — malware analysis report

Static analysis result for SHA-256 85da530abb3b07c6…

MALICIOUS

PDF

42.3 KB Created: 2021-05-10 15:02:47 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 5d368fcb4b77ab99f59a3e7b6599359e SHA-1: 1333126464e2776086d7760b41a6e335a01cc68f SHA-256: 85da530abb3b07c632dec9548d59dd6e79121d0a8800983df3b1c5bf0c3386f1
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 0.9971

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.xyz/app/406889139/coin-master-spin-link-today-2021-game-hack PDF link annotation
    • http://digilib-pps.unja.ac.id/repository/coin-master-hack-unlimited-spins-apk-download_GM406889139.pdfIn PDF document text
    • http://digilib-pps.unja.ac.id/repository/game-hunters-coin-master_GM406889139.pdfIn PDF document text
    • http://digilib-pps.unja.ac.id/repository/minecraft-book-collection_GM479516143.pdfIn PDF document text
    • http://digilib-pps.unja.ac.id/repository/free-ways-to-get-robux_GM431946152.pdfIn PDF document text
    • http://digilib-pps.unja.ac.id/repository/minecraft-svg-images-free_GM479516143.pdfIn PDF document text
    • http://digilib-pps.unja.ac.id/repository/coin-master-links-for-free-spins-2021_GM406889139.pdfIn PDF document text
    • http://digilib-pps.unja.ac.id/repository/roblox-2021-hack_GM431946152.pdfIn PDF document text
    • http://digilib-pps.unja.ac.id/repository/free-coins-coin-master-link-today_GM406889139.pdfIn PDF document text
    • http://digilib-pps.unja.ac.id/repository/free-robux-websites-that-work_GM431946152.pdfIn PDF document text
    • http://digilib-pps.unja.ac.id/repository/free-robux-games-that-actually-work-2021_GM431946152.pdfIn PDF document text
    • http://digilib-pps.unja.ac.id/repository/apps-that-give-you-free-robux_GM431946152.pdfIn PDF document text
    • http://digilib-pps.unja.ac.id/repository/coin-master-hack-apk-download-latest-version_GM406889139.pdfIn PDF document text
    • http://digilib-pps.unja.ac.id/repository/free-robux-working_GM431946152.pdfIn PDF document text
    • http://digilib-pps.unja.ac.id/repository/minecraft-bedrock-free-server-hosting_GM479516143.pdfIn PDF document text
    • http://digilib-pps.unja.ac.id/repository/how-to-get-free-robux-without-downloading-apps-2021_GM431946152.pdfIn PDF document text
    • http://digilib-pps.unja.ac.id/repository/hack-download_GM431946152.pdfIn PDF document text
    • http://digilib-pps.unja.ac.id/repository/free-robux-clothes_GM431946152.pdfIn PDF document text
    • http://digilib-pps.unja.ac.id/repository/cm-spins_GM406889139.pdfIn PDF document text
    • http://digilib-pps.unja.ac.id/repository/como-hackear-coin-master-2021-espaol_GM406889139.pdfIn PDF document text
    • http://digilib-pps.unja.ac.id/repository/minecraft-toys-for-free_GM479516143.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_003_off00004882.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4882 25232 bytes
SHA-256: 552fda03d8425baaa511561c486ee1229d0afc2980a3c781922f7f453e08685a
font_01_sfnt_off00008168.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8168 18648 bytes
SHA-256: 85a64f08e45ce4d12cb3dea07aac547d867e231e390d244bf8ece1ec3ac8270e

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