Malicious PDF — malware analysis report

Static analysis result for SHA-256 87e113cd27369ae3…

MALICIOUS

PDF

34.4 KB Created: 2021-07-06 20:01:10 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 1594dc790158b922e40643a468a37b2c SHA-1: 2799fb37aa918933090562bb96f0424737445a89 SHA-256: 87e113cd27369ae3a58c89bb955957833a50f17687b237a8336ac5625dc22437
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/431946152/roblox-free-bundles-game-hack PDF link annotation
    • http://e-library.smkn1jombang.sch.id/repository/how-to-download-minecraft-for-free-on-your-phone_GM479516143.pdfIn PDF document text
    • http://e-library.smkn1jombang.sch.id/repository/coin-master-free-spins-link-today-instagram_GM406889139.pdfIn PDF document text
    • http://e-library.smkn1jombang.sch.id/repository/how-to-get-robux-for-free-without-doing-anything_GM431946152.pdfIn PDF document text
    • http://e-library.smkn1jombang.sch.id/repository/get-free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://e-library.smkn1jombang.sch.id/repository/how-to-get-free-faces-on-roblox_GM431946152.pdfIn PDF document text
    • http://e-library.smkn1jombang.sch.id/repository/hack-coin-master-343-apk_GM406889139.pdfIn PDF document text
    • http://e-library.smkn1jombang.sch.id/repository/show-me-how-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://e-library.smkn1jombang.sch.id/repository/free-minecraft-printables-food-labels_GM479516143.pdfIn PDF document text
    • http://e-library.smkn1jombang.sch.id/repository/roblox-drive-shaft-money-hack_GM431946152.pdfIn PDF document text
    • http://e-library.smkn1jombang.sch.id/repository/free-gift-cards-for-robux_GM431946152.pdfIn PDF document text
    • http://e-library.smkn1jombang.sch.id/repository/coin-master-free-spins-hack-without-human-verification_GM406889139.pdfIn PDF document text
    • http://e-library.smkn1jombang.sch.id/repository/hacked-version-of-parkour-roblox_GM431946152.pdfIn PDF document text
    • http://e-library.smkn1jombang.sch.id/repository/how-do-you-get-free-robux-on-roblox-2021_GM431946152.pdfIn PDF document text
    • http://e-library.smkn1jombang.sch.id/repository/games-that-can-be-hacked_GM431946152.pdfIn PDF document text
    • http://e-library.smkn1jombang.sch.id/repository/coin-master-70-spin-link_GM406889139.pdfIn PDF document text
    • http://e-library.smkn1jombang.sch.id/repository/coin-master-cheat-to-get-free-spins_GM406889139.pdfIn PDF document text
    • http://e-library.smkn1jombang.sch.id/repository/como-hackear-coin-master-gratis_GM406889139.pdfIn PDF document text
    • http://e-library.smkn1jombang.sch.id/repository/free-spins-coin-master-november-2021_GM406889139.pdfIn PDF document text
    • http://e-library.smkn1jombang.sch.id/repository/hack-para-coin-master-sin-verification_GM406889139.pdfIn PDF document text
    • http://e-library.smkn1jombang.sch.id/repository/how-to-get-free-robux-fast-and-easy_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
font_00_sfnt_off00003178.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3178 21876 bytes
SHA-256: bfedea02b83ba17cf7c78f9807dbffcedb3009eba753a9d069b7881e9e715844
font_01_sfnt_off000061bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x61BB 18964 bytes
SHA-256: c92e42bb26df758d0ede5fbc703833b645d0b878db7a54c24e51c73b8a7d06d3