Malicious PDF — malware analysis report

Static analysis result for SHA-256 cd5f7fe4dd676ac4…

MALICIOUS

PDF

34.4 KB Created: 2021-07-07 23:58:07 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01
MD5: e20ff85ec3f02d12fcea508fc437b88c SHA-1: a13cad1a33b2bb19a3fa7bb3dfa0f49e668f45c0 SHA-256: cd5f7fe4dd676ac466f9a483d5a9ecbd2c3d2c19d41218fb73d0fbeabcc184d0
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/coin-master-free-spin-and-coin-game-hack PDF link annotation
    • http://perpustakaan.idia.ac.id/repository/can-you-actually-get-free-robux_GM431946152.pdfIn PDF document text
    • http://perpustakaan.idia.ac.id/repository/coin-master-daily-free-spins-link_GM406889139.pdfIn PDF document text
    • http://perpustakaan.idia.ac.id/repository/free-pants-roblox-girl_GM431946152.pdfIn PDF document text
    • http://perpustakaan.idia.ac.id/repository/how-to-get-free-robux-games_GM431946152.pdfIn PDF document text
    • http://perpustakaan.idia.ac.id/repository/coin-master-spins-hack_GM406889139.pdfIn PDF document text
    • http://perpustakaan.idia.ac.id/repository/minecraft-free-download-ios_GM479516143.pdfIn PDF document text
    • http://perpustakaan.idia.ac.id/repository/free-robux-rewards_GM431946152.pdfIn PDF document text
    • http://perpustakaan.idia.ac.id/repository/free-roblox-hair-codes_GM431946152.pdfIn PDF document text
    • http://perpustakaan.idia.ac.id/repository/how-to-be-invisible-on-roblox-with-cheat-engine_GM431946152.pdfIn PDF document text
    • http://perpustakaan.idia.ac.id/repository/how-to-get-free-spins-on-coin-master-android_GM406889139.pdfIn PDF document text
    • http://perpustakaan.idia.ac.id/repository/coin-master-free-spin-and-coins-links-2021_GM406889139.pdfIn PDF document text
    • http://perpustakaan.idia.ac.id/repository/coin-master-free-spin-game_GM406889139.pdfIn PDF document text
    • http://perpustakaan.idia.ac.id/repository/bux-gg-robux-free_GM431946152.pdfIn PDF document text
    • http://perpustakaan.idia.ac.id/repository/free-gamemappses-roblox_GM431946152.pdfIn PDF document text
    • http://perpustakaan.idia.ac.id/repository/hacker-coin-master_GM406889139.pdfIn PDF document text
    • http://perpustakaan.idia.ac.id/repository/free-spins-for-coin-master-game_GM406889139.pdfIn PDF document text
    • http://perpustakaan.idia.ac.id/repository/is-there-any-way-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://perpustakaan.idia.ac.id/repository/ninja-animation-package-free-roblox_GM431946152.pdfIn PDF document text
    • http://perpustakaan.idia.ac.id/repository/roblox-military-simulator-hack-mecha_GM431946152.pdfIn PDF document text
    • http://perpustakaan.idia.ac.id/repository/free-shirt-roblox_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_off00002f64.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2F64 23132 bytes
SHA-256: d5a03160a142b074114b21824372168ae5e549325227204a23a25210fb1c0aa2
font_01_sfnt_off00006392.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6392 18348 bytes
SHA-256: 3aa320ccb9cb7c087074e4ef079b33192d8e05703f275142029ef104db56ac85

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