Malicious PDF — malware analysis report

Static analysis result for SHA-256 b6a3f08195d7fd44…

MALICIOUS

PDF

47.4 KB Created: 2021-05-11 15:31:42 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: dc337c071f43d8e8bd1ebf79e68141bc SHA-1: 2c70624baf88c618b69015ca851562c834c2a313 SHA-256: b6a3f08195d7fd44b5cfeaa8e77e7c8ab6f2f4478739545233704515f4f0bb2e
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded links that redirect to malicious infrastructure, specifically targeting users interested in game hacks and free currency. The heuristic firings indicate these links lead to known malicious redirectors and a lure for downloading applications. While no scripts were explicitly extracted, the PDF structure itself facilitates the redirection, likely leading to the download of a second-stage payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9013

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.xyz/app/431946152/hacking-apps-for-roblox-game-hack In PDF document text
    • http://repository.poltekkesjakarta3.ac.id/repository/minecraft-apk-android-free_GM479516143.pdfIn PDF document text
    • http://repository.poltekkesjakarta3.ac.id/repository/how-do-you-get-free-roblox-money_GM431946152.pdfIn PDF document text
    • http://repository.poltekkesjakarta3.ac.id/repository/coin-master-daily-free-spins-link-blogspot_GM406889139.pdfIn PDF document text
    • http://repository.poltekkesjakarta3.ac.id/repository/coin-master-free-stuff_GM406889139.pdfIn PDF document text
    • http://repository.poltekkesjakarta3.ac.id/repository/minecraft-xbox-one-code-free_GM479516143.pdfIn PDF document text
    • http://repository.poltekkesjakarta3.ac.id/repository/coin-master-free-spins-cash_GM406889139.pdfIn PDF document text
    • http://repository.poltekkesjakarta3.ac.id/repository/where-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://repository.poltekkesjakarta3.ac.id/repository/ios-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://repository.poltekkesjakarta3.ac.id/repository/coin-master-free-spins-link-2021-hack_GM406889139.pdfIn PDF document text
    • http://repository.poltekkesjakarta3.ac.id/repository/minecraft-cheats-switch_GM479516143.pdfIn PDF document text
    • http://repository.poltekkesjakarta3.ac.id/repository/free-spins-coinmaster_GM406889139.pdfIn PDF document text
    • http://repository.poltekkesjakarta3.ac.id/repository/coin-master-cheat-free_GM406889139.pdfIn PDF document text
    • http://repository.poltekkesjakarta3.ac.id/repository/free-robux-codes-no-verification-2021_GM431946152.pdfIn PDF document text
    • http://repository.poltekkesjakarta3.ac.id/repository/free-robux-no-generator_GM431946152.pdfIn PDF document text
    • http://repository.poltekkesjakarta3.ac.id/repository/how-to-get-free-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://repository.poltekkesjakarta3.ac.id/repository/how-to-get-free-spins-on-coin-master-ios_GM406889139.pdfIn PDF document text
    • http://repository.poltekkesjakarta3.ac.id/repository/robux-generator_GM431946152.pdfIn PDF document text
    • http://repository.poltekkesjakarta3.ac.id/repository/oprewards-login_GM431946152.pdfIn PDF document text
    • http://repository.poltekkesjakarta3.ac.id/repository/coin-master-free-stars_GM406889139.pdfIn PDF document text
    • http://repository.poltekkesjakarta3.ac.id/repository/minecraft-wurst-client_GM479516143.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004b56.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4B56 24204 bytes
SHA-256: 14786ac89d13c935b3b5d0fb691ec75dcb7c6e43cda67f2eb096901e010820fe
font_01_sfnt_off000082e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x82E0 7448 bytes
SHA-256: a76ff9b4805dcff342f7268a16e2e3c2ff2b31b96c381fe4deb6ceea777bce90
font_02_sfnt_off000094c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x94C3 18932 bytes
SHA-256: a12a900017875743d46ad83be25c63e25fa00e3014bd6d438c4b8f248ab77b0b

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