Malicious PDF — malware analysis report

Static analysis result for SHA-256 cd780bfbceb1f253…

MALICIOUS

PDF

34.9 KB Created: 2021-06-27 17:15:03 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-19
MD5: b2a65b8037fbf0fcf21df25dc99dad85 SHA-1: 0bfbc99555b06db4faefc599e5a4afa5ac90afd3 SHA-256: cd780bfbceb1f253b8c01cd68f031df2e71709d53b4a038752261ab548335323
220 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 5

  • 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.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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.co/app/431946152/free-man-face-roblox-game-hack In PDF document text
    • http://nationshield.ae/userfiles/files/coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://nationshield.ae/userfiles/files/coin-master-unlimited-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • http://nationshield.ae/userfiles/files/coin-master-free-link-today_GM406889139.pdfIn PDF document text
    • http://nationshield.ae/userfiles/files/mcpe-master-hack-unlimited-coins-download_GM406889139.pdfIn PDF document text
    • http://nationshield.ae/userfiles/files/how-to-get-free-stuff-in-roblox-royale-high_GM431946152.pdfIn PDF document text
    • http://nationshield.ae/userfiles/files/how-to-cheat-and-get-golden-apple-hamster-simulator-roblox_GM431946152.pdfIn PDF document text
    • http://nationshield.ae/userfiles/files/coin-master-free-spins-ios_GM406889139.pdfIn PDF document text
    • http://nationshield.ae/userfiles/files/roblox-hack-codes-2021_GM431946152.pdfIn PDF document text
    • http://nationshield.ae/userfiles/files/coin-master-hack-for-ios_GM406889139.pdfIn PDF document text
    • http://nationshield.ae/userfiles/files/free-spins-for-coin-master-app_GM406889139.pdfIn PDF document text
    • http://nationshield.ae/userfiles/files/actual-free-robux_GM431946152.pdfIn PDF document text
    • http://nationshield.ae/userfiles/files/get-free-robux-now_GM431946152.pdfIn PDF document text
    • http://nationshield.ae/userfiles/files/hack-coin-master-app-ios_GM406889139.pdfIn PDF document text
    • http://nationshield.ae/userfiles/files/how-to-get-free-robux-on-iphone_GM431946152.pdfIn PDF document text
    • http://nationshield.ae/userfiles/files/free-role-in-coin-master_GM406889139.pdfIn PDF document text
    • http://nationshield.ae/userfiles/files/coin-master-free-cards-link-2021_GM406889139.pdfIn PDF document text
    • http://nationshield.ae/userfiles/files/free-robux-hack-no-human-verification-or-survey_GM431946152.pdfIn PDF document text
    • http://nationshield.ae/userfiles/files/free-robux-gift-cards-live-now_GM431946152.pdfIn PDF document text
    • http://nationshield.ae/userfiles/files/coin-master-latest-mod-apk-free-download_GM406889139.pdfIn PDF document text
    • http://nationshield.ae/userfiles/files/robux-hack-generator_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_off0000328f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x328F 22160 bytes
SHA-256: ffc61254fdab501060dfe195aa05646ee044500c4e100c52c54af7d03d92cf56
font_01_sfnt_off000063f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x63F6 18844 bytes
SHA-256: a2652912bea3ef3a82504249f7195b4ae7c93a96299aeceed92cc72a28512b11

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