Malicious PDF — malware analysis report

Static analysis result for SHA-256 bf9472b6e6c838ec…

MALICIOUS

PDF

34.3 KB Created: 2021-07-06 01:12:25 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: e58315281cac7ece83d43e9f0b2a5921 SHA-1: 51297851e849081bbbcdc7173c68df78db438313 SHA-256: bf9472b6e6c838ec750d82edab05de774e77da77bed2cc91402ad46508b383da
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links that redirect to malicious infrastructure, specifically promoting 'game hacks' and 'free spins' for popular games. The primary lure appears to be a 'Coin Master Free Spins Gratis' generator, which is hosted on a known malicious redirector. The document's structure and embedded URLs suggest a phishing or scam attempt designed to lure users to potentially malicious sites.

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.tw/app/406889139/coin-master-free-spins-gratis-game-hack In PDF document text
    • http://opac.stieimalang.ac.id/repository/download-coin-master-apk-hack_GM406889139.pdfIn PDF document text
    • http://www.opac.stieimalang.ac.id/repository/get-free-roblox-followers_GM431946152.pdfIn PDF document text
    • http://opac.stieimalang.ac.id/repository/fake-robux-codes_GM431946152.pdfIn PDF document text
    • http://opac.stieimalang.ac.id/repository/real-free-robux-games-2021_GM431946152.pdfIn PDF document text
    • http://www.opac.stieimalang.ac.id/repository/download-free-download-how-to-buy-free-robux_GM431946152.pdfIn PDF document text
    • http://www.opac.stieimalang.ac.id/repository/free-robux-games-2021_GM431946152.pdfIn PDF document text
    • http://www.opac.stieimalang.ac.id/repository/free-roebucks_GM431946152.pdfIn PDF document text
    • http://www.opac.stieimalang.ac.id/repository/easy-how-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://opac.stieimalang.ac.id/repository/how-to-get-free-robux-by-playing-games_GM431946152.pdfIn PDF document text
    • http://opac.stieimalang.ac.id/repository/coin-master-daily-free-spins-hack_GM406889139.pdfIn PDF document text
    • http://opac.stieimalang.ac.id/repository/how-to-get-free-spins-on-coin-master-ios_GM406889139.pdfIn PDF document text
    • http://www.opac.stieimalang.ac.id/repository/free-roblox-acc_GM431946152.pdfIn PDF document text
    • http://opac.stieimalang.ac.id/repository/jailbreak-roblox-hack_GM431946152.pdfIn PDF document text
    • http://opac.stieimalang.ac.id/repository/free-minecraft-server-hosting-with-plugins_GM479516143.pdfIn PDF document text
    • http://opac.stieimalang.ac.id/repository/free-robux-microsoft_GM431946152.pdfIn PDF document text
    • http://www.opac.stieimalang.ac.id/repository/how-to-hack-someone-roblox_GM431946152.pdfIn PDF document text
    • http://opac.stieimalang.ac.id/repository/free-magical-chest-coin-master_GM406889139.pdfIn PDF document text
    • http://opac.stieimalang.ac.id/repository/minecraft-alt-accounts-free_GM479516143.pdfIn PDF document text
    • http://www.opac.stieimalang.ac.id/repository/free-robux-with-creditcard-genaretor_GM431946152.pdfIn PDF document text
    • http://www.opac.stieimalang.ac.id/repository/free-robux-no-generator_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_off00002fc8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2FC8 23108 bytes
SHA-256: 152f9fe2d2d5655d2b82712b57dd122f3fa9ce13f66a1b56824ba434f1843e1b
font_01_sfnt_off000063bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x63BD 18176 bytes
SHA-256: 220cc08b156a25e7f0738aa2ffed122a04d3b7eef92f96fc2d602fbd09f3cf7b

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