Malicious PDF — malware analysis report

Static analysis result for SHA-256 8acd4af789d705a2…

MALICIOUS

PDF

50.2 KB Created: 2021-06-03 08:11:05 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: f9745f5326506eaf2ccf018ea36457c1 SHA-1: cc7dcb77d2eba8b6665d3e2d6a00ef78470cbbdd SHA-256: 8acd4af789d705a2036dfd45f871750f38ce5cb71f1b995904c609f4216007d1
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links that redirect to malicious infrastructure, specifically advertising 'free generators' or 'game hacks' for popular games. The primary malicious URL identified is https://netcdn.online/app/431946152/rbx-roblox-game-hack. The document body and heuristics indicate a lure designed to trick users into clicking these links, likely leading to further malware downloads or phishing attempts. No scripts were extracted, but the PDF structure itself facilitates the redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9871

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/431946152/rbx-roblox-game-hack In PDF document text
    • http://library.stikessuakainsan.ac.id/repository/coin-master-link-spin_GM406889139.pdfIn PDF document text
    • http://library.stikessuakainsan.ac.id//repository/coin-master-free-in-app-purchases_GM406889139.pdfIn PDF document text
    • http://library.stikessuakainsan.ac.id//repository/coin-master-free-spins-link-2021-hack_GM406889139.pdfIn PDF document text
    • http://library.stikessuakainsan.ac.id//repository/minecraft-aimbot_GM479516143.pdfIn PDF document text
    • http://library.stikessuakainsan.ac.id//repository/minecraft-java-for-free_GM479516143.pdfIn PDF document text
    • http://library.stikessuakainsan.ac.id//repository/coin-master-link-app_GM406889139.pdfIn PDF document text
    • http://library.stikessuakainsan.ac.id//repository/free-coins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://library.stikessuakainsan.ac.id/repository/free-roblox-accounts-with-robux-that-work-2021_GM431946152.pdfIn PDF document text
    • http://library.stikessuakainsan.ac.id//repository/actual-free-robux_GM431946152.pdfIn PDF document text
    • http://library.stikessuakainsan.ac.id/repository/how-to-get-free-spins-on-coin-master-blogspot_GM406889139.pdfIn PDF document text
    • http://library.stikessuakainsan.ac.id//repository/legit-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://library.stikessuakainsan.ac.id/repository/no-scam-free-robux_GM431946152.pdfIn PDF document text
    • http://library.stikessuakainsan.ac.id/repository/extra-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://library.stikessuakainsan.ac.id//repository/coin-master-free-spins-and-coins-hack_GM406889139.pdfIn PDF document text
    • http://library.stikessuakainsan.ac.id//repository/get-free-robux-without-human-verification_GM431946152.pdfIn PDF document text
    • http://library.stikessuakainsan.ac.id/repository/games-on-roblox-that-give-you-free-robux_GM431946152.pdfIn PDF document text
    • http://library.stikessuakainsan.ac.id//repository/minecraft-mojang-free_GM479516143.pdfIn PDF document text
    • http://library.stikessuakainsan.ac.id//repository/free-robux-that-actually-works-2021_GM431946152.pdfIn PDF document text
    • http://library.stikessuakainsan.ac.id/repository/give-free-robux_GM431946152.pdfIn PDF document text
    • http://library.stikessuakainsan.ac.id/repository/coin-master-daily-free-spins_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_off00005578.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5578 33104 bytes
SHA-256: 10ee64dcfd1c57e6f49453e04694a0a9643c7a603672a1319aca0e862ecc18bb
font_01_sfnt_off0000a369.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA369 17784 bytes
SHA-256: b5f4a847199c5858993cc7b96674f5fc7fdb993d36e54c452d2822089e03f31f

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