Malicious PDF — malware analysis report

Static analysis result for SHA-256 a56c756e2492b03d…

MALICIOUS

PDF

45.0 KB Created: 2021-06-08 15:20:45 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: cff86a81809f6262910304b2159c3fca SHA-1: eb63d5111af8e163e416eb4f7d3bb07ed2e781aa SHA-256: a56c756e2492b03dc056a7e03f6c4c01080ba1237409f90e894149ec730fe3d9
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links that redirect to malicious infrastructure, specifically promoting 'free generator / game hack' lures. The document body text and embedded URLs strongly suggest a phishing or scam attempt designed to trick users into visiting potentially harmful websites. While no scripts were explicitly extracted, the PDF structure and heuristic firings indicate malicious redirection capabilities.

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.tw/app/431946152/free-roblox-accounts-with-robux-not-used-game-hack In PDF document text
    • https://lib.unitri.ac.id/repository/play-coin-master-for-free_GM406889139.pdfIn PDF document text
    • https://lib.unitri.ac.id//repository/coin-master-free-spins-link-today-hack_GM406889139.pdfIn PDF document text
    • https://lib.unitri.ac.id/repository/hacks-for-minecraft-bedrock_GM479516143.pdfIn PDF document text
    • https://lib.unitri.ac.id/repository/minecraft-java-free-account_GM479516143.pdfIn PDF document text
    • https://lib.unitri.ac.id/repository/coin-master-free-coins-and-spins-link_GM406889139.pdfIn PDF document text
    • https://lib.unitri.ac.id/repository/free-tiktok-views_GM835599320.pdfIn PDF document text
    • https://lib.unitri.ac.id/repository/minecraft-free-games-no-download_GM479516143.pdfIn PDF document text
    • https://lib.unitri.ac.id/repository/free-tiktok-likes-trial_GM835599320.pdfIn PDF document text
    • https://lib.unitri.ac.id//repository/coin-master-links-to-free-spins_GM406889139.pdfIn PDF document text
    • https://lib.unitri.ac.id/repository/minecraft-apk-free-download-016-0_GM479516143.pdfIn PDF document text
    • https://lib.unitri.ac.id/repository/free-promo-codes-for-coin-master_GM406889139.pdfIn PDF document text
    • https://lib.unitri.ac.id/repository/minecraft-java-edition-redeem-code-free-2021_GM479516143.pdfIn PDF document text
    • https://lib.unitri.ac.id/repository/coin-master-game-hack-online_GM406889139.pdfIn PDF document text
    • https://lib.unitri.ac.id/repository/free-robux-no-human-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • https://lib.unitri.ac.id/repository/free-spins-coin-master-no-survey_GM406889139.pdfIn PDF document text
    • https://lib.unitri.ac.id//repository/coin-master-free-spin-realme-products_GM406889139.pdfIn PDF document text
    • https://lib.unitri.ac.id//repository/coin-master-daily-free-spins-link-app_GM406889139.pdfIn PDF document text
    • https://lib.unitri.ac.id//repository/master-coin-free-spin_GM406889139.pdfIn PDF document text
    • https://lib.unitri.ac.id//repository/free-coins-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://lib.unitri.ac.id/repository/pokemon-go-free-gift-codes_GM1094591345.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_off000051de.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x51DE 25020 bytes
SHA-256: 4da333685d8ecab65283b312face16c4a1e4e27a6dd600e989ac9a28206a62b6
font_01_sfnt_off00008b0f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8B0F 19036 bytes
SHA-256: e655673cb4431020449ede9979f141b08eb45c87e2d750ef51b5784ac455030c

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