Malicious PDF — malware analysis report

Static analysis result for SHA-256 dae51ae1789c0cca…

MALICIOUS

PDF

45.5 KB Created: 2021-06-09 13:06:45 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 5aa37de9126713650a68e11cc68390b7 SHA-1: a9fa34ef2498df51174e4dfc7f8c0cec565d6529 SHA-256: dae51ae1789c0cca0b9dffe7b6cb9bc9d054a144bf078b51886a2b518e3d4edf
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded URLs that lead to known malicious redirectors, specifically advertising game hacks and free generators for popular games. The ML classifier also flagged this PDF as malicious with high confidence. The primary attack pattern involves luring users to click on these links, likely to download further malware or engage in phishing activities.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9864

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/roblox-we-are-number-one-hack-game-hack In PDF document text
    • https://lib.unitri.ac.id/repository/actual-working-free-robux_GM431946152.pdfIn PDF document text
    • https://lib.unitri.ac.id/repository/free-robux-com_GM431946152.pdfIn PDF document text
    • https://lib.unitri.ac.id/repository/how-to-get-minecraft-bedrock-for-free_GM479516143.pdfIn PDF document text
    • https://lib.unitri.ac.id/repository/robux-hack-ultimate-gamer-365_GM431946152.pdfIn PDF document text
    • https://lib.unitri.ac.id/repository/cone-master_GM406889139.pdfIn PDF document text
    • https://lib.unitri.ac.id/repository/free-group-roblox_GM431946152.pdfIn PDF document text
    • https://lib.unitri.ac.id/repository/coin-master-free-soins_GM406889139.pdfIn PDF document text
    • https://lib.unitri.ac.id/repository/how-to-make-a-group-in-roblox-for-free_GM431946152.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/minecraft-redeem-code-free_GM479516143.pdfIn PDF document text
    • https://lib.unitri.ac.id//repository/claimrbx-free-robux_GM431946152.pdfIn PDF document text
    • https://lib.unitri.ac.id/repository/free-robux-codes-2021_GM431946152.pdfIn PDF document text
    • https://lib.unitri.ac.id/repository/get-free-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://lib.unitri.ac.id/repository/coin-master-free-spins-link-today-2021_GM406889139.pdfIn PDF document text
    • https://lib.unitri.ac.id//repository/pig-master-coin-master-free-spin_GM406889139.pdfIn PDF document text
    • https://lib.unitri.ac.id/repository/roblox-script-hack_GM431946152.pdfIn PDF document text
    • https://lib.unitri.ac.id/repository/coin-master-gameplay_GM406889139.pdfIn PDF document text
    • https://lib.unitri.ac.id//repository/how-to-scam-on-roblox_GM431946152.pdfIn PDF document text
    • https://lib.unitri.ac.id/repository/free-minecraft-gift-codes_GM479516143.pdfIn PDF document text
    • https://lib.unitri.ac.id//repository/free-spins-for-coin-master-that-work_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_off0000521b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x521B 26776 bytes
SHA-256: 2d40264c7f8e8595f11b273e8329d8f38c70a291043691d819784665c4175937
font_01_sfnt_off00008daf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8DAF 18780 bytes
SHA-256: 12fc1e5134f954b1521a891663d32373d613ba3bab49c295050e28f5f4dcef23

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