Malicious PDF — malware analysis report

Static analysis result for SHA-256 8f79c339dfb525b8…

MALICIOUS

PDF

36.3 KB Created: 2021-06-26 06:36:54 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 21ba04f0bc49a06c6c804eed7df3729b SHA-1: e30a1426036e5acae7971257e193a870d5f031b8 SHA-256: 8f79c339dfb525b8d44735cf9642bf669b7509737786cd63b18e2e3766d87252
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to a known malicious redirector infrastructure, specifically advertising 'free generator / game hack' lures. The document body reinforces this by including the same URL and related keywords, suggesting an attempt to trick users into visiting a malicious site. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 http://netcdn.co/app/431946152/how-to-hack-any-items-free-roblox-game-hack In PDF document text
    • http://digilib.akbidarrahma.ac.id/repository/como-hackear-cuentas-de-roblox-sin-necesidad-de-contrasea_GM431946152.pdfIn PDF document text
    • http://digilib.akbidarrahma.ac.id/repository/roblox-www-com_GM431946152.pdfIn PDF document text
    • http://digilib.akbidarrahma.ac.id/repository/coin-master-free-spins-daily-1-ga_GM406889139.pdfIn PDF document text
    • http://digilib.akbidarrahma.ac.id/repository/roblox-granny-hack_GM431946152.pdfIn PDF document text
    • http://digilib.akbidarrahma.ac.id/repository/coin-master-hack-2021-app-download_GM406889139.pdfIn PDF document text
    • http://digilib.akbidarrahma.ac.id/repository/give-me-free-robux_GM431946152.pdfIn PDF document text
    • http://digilib.akbidarrahma.ac.id/repository/free-tiktok-likes-generator_GM835599320.pdfIn PDF document text
    • http://digilib.akbidarrahma.ac.id/repository/how-to-speed-hack-robloxity_GM431946152.pdfIn PDF document text
    • http://digilib.akbidarrahma.ac.id/repository/how-to-download-minecraft-for-free-on-iphone_GM479516143.pdfIn PDF document text
    • http://digilib.akbidarrahma.ac.id/repository/free-robux-app-real_GM431946152.pdfIn PDF document text
    • http://digilib.akbidarrahma.ac.id/repository/how-to-start-a-minecraft-server-for-free_GM479516143.pdfIn PDF document text
    • http://digilib.akbidarrahma.ac.id/repository/app-master_GM406889139.pdfIn PDF document text
    • http://digilib.akbidarrahma.ac.id/repository/how-to-win-robux_GM431946152.pdfIn PDF document text
    • http://digilib.akbidarrahma.ac.id/repository/roblox-games-stealing-free-models_GM431946152.pdfIn PDF document text
    • http://digilib.akbidarrahma.ac.id/repository/coin-master-50-spin-link_GM406889139.pdfIn PDF document text
    • http://digilib.akbidarrahma.ac.id/repository/is-minecraft-java-edition-free_GM479516143.pdfIn PDF document text
    • http://digilib.akbidarrahma.ac.id/repository/how-to-get-minecraft-realms-for-free_GM479516143.pdfIn PDF document text
    • http://digilib.akbidarrahma.ac.id/repository/coin-master-hack-mod-apk-unlimited-spins_GM406889139.pdfIn PDF document text
    • http://digilib.akbidarrahma.ac.id/repository/coin-master-free-spins-gratis_GM406889139.pdfIn PDF document text
    • http://digilib.akbidarrahma.ac.id/repository/free-pet-snacks-coin-master_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
font_00_sfnt_off000033bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x33BF 23052 bytes
SHA-256: d445765dd45a8c07572d01db31985f2d59dab874e55ab7dbcacd5a6079ea63a1
font_01_sfnt_off000067be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x67BE 19528 bytes
SHA-256: cdcb929463588df0ebb2f683b6977a3b4656fdabfd151d98580bd2688ec90a96

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