Malicious PDF — malware analysis report

Static analysis result for SHA-256 4bd0adf8f2150443…

MALICIOUS

PDF

35.1 KB Created: 2021-07-05 12:53:41 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 0b1a0b8c07a3af0954e1986639122160 SHA-1: 2adbfe8179ecca26c2fafcf49e53a9bfa095b5e2 SHA-256: 4bd0adf8f2150443724e435cee54c04cf85a0f3266c8cfe00036bf8a0fb6c3a3
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links that redirect to malicious infrastructure, specifically promoting 'Robux Generator No Survey' lures. The document body and extracted URLs strongly indicate a phishing attempt to trick users into visiting potentially harmful sites. No scripts were extracted, but the embedded URLs and the nature of the lure suggest a social engineering attack.

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/431946152/robux-generator-no-survey-game-hack In PDF document text
    • https://pustaka.widyakartika.ac.id/repository/robux-command-hack_GM431946152.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/how-to-get-free-robux-on-an-xbox-on_GM431946152.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/hacking-my-boyfriends-roblox-yammy_GM431946152.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/how-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/coin-master-gameplay_GM406889139.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/bloxland-earn-free-robux_GM431946152.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/how-to-hack-a-site-to-give-you-robux_GM431946152.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/get-free-robux-without-human-verification_GM431946152.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/roblox-free-robux-generator_GM431946152.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/free-robux-today_GM431946152.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/coin-master-free-blogspot_GM406889139.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/free-coin-and-spin-for-coin-master_GM406889139.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/coin-master-hack-activegamer_GM406889139.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/how-to-hack-roblox-on-mac-2021_GM431946152.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/pubg-uc-2021_GM1330123889.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/easy-ways-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/free-unused-robux-codes-2021_GM431946152.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/roblox-report-hacker_GM431946152.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/minecraft-servers-that-allow-hacks_GM479516143.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/cheat-engine-scripts-for-roblox_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_off0000312a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x312A 22808 bytes
SHA-256: 66ffeb82143029cf3882ab27f18d951c039c77fcff61664306102affd64feffa
font_01_sfnt_off00006471.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6471 18952 bytes
SHA-256: 94f6cf16237cbca8d0e390b5c3f7c21e1b4ca1017dab6383eb044ff4db3044d4

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