Malicious PDF — malware analysis report

Static analysis result for SHA-256 19bcdf8f1f021b98…

MALICIOUS

PDF

47.7 KB Created: 2021-06-03 08:04:16 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: e58f54b401d31a95acfc9467565ecc58 SHA-1: c7f4cf18c6e195f86e89829ef7bd5d2eaee112ba SHA-256: 19bcdf8f1f021b985a9c7b0c57c9f50ad2362cf1b5f3412a419f3b3e7043618a
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to known malicious redirector infrastructure, specifically promoting 'game hacks' and 'free spins' to lure victims. The primary malicious URL identified is https://netcdn.online/app/406889139/how-do-i-get-free-spins-on-coin-master-game-hack. While no scripts were explicitly extracted, the PDF structure and embedded links strongly suggest a social engineering attack aimed at redirecting users to potentially harmful content or further malicious downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9769

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/406889139/how-do-i-get-free-spins-on-coin-master-game-hack In PDF document text
    • http://library.patria-artha.ac.id/repository/freerobux-co_GM431946152.pdfIn PDF document text
    • http://library.patria-artha.ac.id/repository/minecraft-free-no-virus_GM479516143.pdfIn PDF document text
    • http://library.patria-artha.ac.id/repository/roblox-hair-for-free_GM431946152.pdfIn PDF document text
    • http://library.patria-artha.ac.id/repository/coin-master-unlimited-spin-hack-apk_GM406889139.pdfIn PDF document text
    • http://library.patria-artha.ac.id/repository/coin-master-hack-mod-apk-free-download_GM406889139.pdfIn PDF document text
    • http://library.patria-artha.ac.id/repository/coin-master-links-for-free-spins-2021_GM406889139.pdfIn PDF document text
    • http://library.patria-artha.ac.id/repository/free-minecraft-coloring-pages_GM479516143.pdfIn PDF document text
    • http://library.patria-artha.ac.id/repository/how-you-get-robux_GM431946152.pdfIn PDF document text
    • http://library.patria-artha.ac.id/repository/minecraft-java-hacks_GM479516143.pdfIn PDF document text
    • http://library.patria-artha.ac.id/repository/free-minecraft-mods_GM479516143.pdfIn PDF document text
    • http://library.patria-artha.ac.id/repository/coin-master-free-spins-hack_GM406889139.pdfIn PDF document text
    • http://library.patria-artha.ac.id/repository/i-want-free-robux_GM431946152.pdfIn PDF document text
    • http://library.patria-artha.ac.id/repository/descargar-hack-coin-master_GM406889139.pdfIn PDF document text
    • http://library.patria-artha.ac.id/repository/code-free-robux_GM431946152.pdfIn PDF document text
    • http://library.patria-artha.ac.id/repository/how-to-send-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://library.patria-artha.ac.id/repository/how-to-hack-coin-master-cheat-engine_GM406889139.pdfIn PDF document text
    • http://library.patria-artha.ac.id/repository/free-robux-no-human-verification-or-survey-or-download-2021_GM431946152.pdfIn PDF document text
    • http://library.patria-artha.ac.id/repository/roblox-zone-free-robux_GM431946152.pdfIn PDF document text
    • http://library.patria-artha.ac.id/repository/coin-master-game-hack-online_GM406889139.pdfIn PDF document text
    • http://library.patria-artha.ac.id/repository/free-spins-for-coin-master-without-human-verification_GM406889139.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_004_off000052af.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x52AF 25852 bytes
SHA-256: bd068182319c27ff9f9f577b13666ae7fd338aeb66add5d1224931b8a994252c
font_01_sfnt_off00008e11.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8E11 2840 bytes
SHA-256: 30dce2b9c1950da345d7fed8f00c38887adfa2f2ddecc31775af2315e819ac37
font_02_sfnt_off000097c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x97C3 18216 bytes
SHA-256: 7b3dc5054b0587ec41e602859ac4e59ac97ec46c9406b1b4182074b4d7a08153