Malicious PDF — malware analysis report

Static analysis result for SHA-256 4ae317a8ffab9491…

MALICIOUS

PDF

44.3 KB Created: 2021-06-03 06:10:39 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-16
MD5: c6e75520b5f2dd7c73b88268ee5c7993 SHA-1: a70dc7e846b8047c523a810a66cc7077ec1f9264 SHA-256: 4ae317a8ffab949192ab575bedf3b6d86bb81606a0882c1e0ce7ee7ab375fc31
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links that redirect to malicious infrastructure, specifically promoting a 'Coin Master Hack'. The heuristic firings indicate the PDF is designed as a lure for game hacks and uses known malicious redirector links. The embedded URL and the document body text reinforce this lure, aiming to trick users into visiting the malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector critical 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. CRITICAL on its own: the /app/<id>/<slug>-game-hack path shape is unambiguous scam infra, and the host rotates so a host-list match can't be relied on.
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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
  • 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-hack-without-human-verification-2021-game-hack In PDF document text
    • http://perpustakaan.dutadharma.ac.id/repository/coin-master-link_GM406889139.pdfIn PDF document text
    • http://perpustakaan.dutadharma.ac.id/repository/free-robux-sites-2021_GM431946152.pdfIn PDF document text
    • http://perpustakaan.dutadharma.ac.id/repository/hack-master-coin_GM406889139.pdfIn PDF document text
    • http://perpustakaan.dutadharma.ac.id/repository/haktuts-coin-master-free-spin-today_GM406889139.pdfIn PDF document text
    • http://perpustakaan.dutadharma.ac.id/repository/free-tiktok-accounts_GM835599320.pdfIn PDF document text
    • http://perpustakaan.dutadharma.ac.id/repository/hack-game-plus-com-coin-master_GM406889139.pdfIn PDF document text
    • http://perpustakaan.dutadharma.ac.id/repository/can-you-make-a-minecraft-server-for-free_GM479516143.pdfIn PDF document text
    • http://perpustakaan.dutadharma.ac.id/repository/coin-master-daily-free-coins-link-today_GM406889139.pdfIn PDF document text
    • http://perpustakaan.dutadharma.ac.id/repository/free-spins-on-coin-master-link_GM406889139.pdfIn PDF document text
    • http://perpustakaan.dutadharma.ac.id/repository/free-robux-for-kids_GM431946152.pdfIn PDF document text
    • http://perpustakaan.dutadharma.ac.id/repository/hack-coin-master-2021-pc_GM406889139.pdfIn PDF document text
    • http://perpustakaan.dutadharma.ac.id/repository/instant-robux_GM431946152.pdfIn PDF document text
    • http://perpustakaan.dutadharma.ac.id/repository/robloxmatchcom-free-robux_GM431946152.pdfIn PDF document text
    • http://perpustakaan.dutadharma.ac.id/repository/coin-master-free-soins_GM406889139.pdfIn PDF document text
    • http://perpustakaan.dutadharma.ac.id/repository/google-moon-active_GM406889139.pdfIn PDF document text
    • http://perpustakaan.dutadharma.ac.id/repository/coin-master-hack-apk-2021-download_GM406889139.pdfIn PDF document text
    • http://perpustakaan.dutadharma.ac.id/repository/free-robux-pastebin_GM431946152.pdfIn PDF document text
    • http://perpustakaan.dutadharma.ac.id/repository/is-minecraft-bedrock-free_GM479516143.pdfIn PDF document text
    • http://perpustakaan.dutadharma.ac.id/repository/twitter-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://perpustakaan.dutadharma.ac.id/repository/coin-master-online-hack-tool_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
stream_004_off000050c8.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x50C8 24332 bytes
SHA-256: 127e9bc01b9d14fb64abcac6a9b3fb67373c6d92d6218837c6b1fb0eff3b9e95
font_01_sfnt_off0000882c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x882C 19016 bytes
SHA-256: 9d151cd353acbc916f7f6eb107110adb70143b0a6a415e6841dd022ecfd31ccb

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