Malicious PDF — malware analysis report

Static analysis result for SHA-256 5100aba5ed56b273…

MALICIOUS

PDF

34.7 KB Created: 2021-07-07 08:57:29 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 115902a15ab29dc636c92360184e9ed1 SHA-1: a1f1edfc5d7be2668e62c7f1c3fc267cdd6bd9a2 SHA-256: 5100aba5ed56b2738a586bbf07ca13a6944da283aa272954061b435b5831a9f7
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document employs a lure related to game hacks, specifically "Coin Master Hack Apk No Survey", to entice users to click on malicious links. The embedded URLs, such as http://netcdn.tw/app/406889139/coin-master-hack-apk-no-survey-game-hack, are identified as malicious redirectors. The document's structure and content strongly suggest an attempt to deliver a second-stage payload or lead the user to a phishing or malware download site.

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/406889139/coin-master-hack-apk-no-survey-game-hack In PDF document text
    • http://knjiznica-oroslavje.hr/files/appsmob-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://knjiznica-oroslavje.hr/files/get-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://www.knjiznica-oroslavje.hr/files/how-to-get-free-robux-on-roblox-hack-2021_GM431946152.pdfIn PDF document text
    • https://www.knjiznica-oroslavje.hr/files/minecraft-wurst_GM479516143.pdfIn PDF document text
    • http://knjiznica-oroslavje.hr/files/coin-master-hack-apk-facebook-login_GM406889139.pdfIn PDF document text
    • http://knjiznica-oroslavje.hr/files/free-hacks-inspect-roblox_GM431946152.pdfIn PDF document text
    • http://knjiznica-oroslavje.hr/files/robux-hack-trackid-sp006_GM431946152.pdfIn PDF document text
    • https://www.knjiznica-oroslavje.hr/files/why-you-never-want-to-use-free-robux_GM431946152.pdfIn PDF document text
    • https://www.knjiznica-oroslavje.hr/files/lumber-tycoon-2-roblox-hack_GM431946152.pdfIn PDF document text
    • http://knjiznica-oroslavje.hr/files/hack-dday-roblox_GM431946152.pdfIn PDF document text
    • http://knjiznica-oroslavje.hr/files/robux-free-gift-card-org-hack_GM431946152.pdfIn PDF document text
    • https://www.knjiznica-oroslavje.hr/files/earn-free-robux-today_GM431946152.pdfIn PDF document text
    • http://knjiznica-oroslavje.hr/files/best-free-minecraft-server-hosting_GM479516143.pdfIn PDF document text
    • https://www.knjiznica-oroslavje.hr/files/how-to-get-free-robux-no-human-verification_GM431946152.pdfIn PDF document text
    • http://knjiznica-oroslavje.hr/files/como-conseguir-robux-sin-hacks_GM431946152.pdfIn PDF document text
    • http://knjiznica-oroslavje.hr/files/unlimited-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://knjiznica-oroslavje.hr/files/hack-coin-master-without-human-verification_GM406889139.pdfIn PDF document text
    • https://www.knjiznica-oroslavje.hr/files/best-free-minecraft-servers_GM479516143.pdfIn PDF document text
    • https://www.knjiznica-oroslavje.hr/files/free-robux-2021-october_GM431946152.pdfIn PDF document text
    • http://knjiznica-oroslavje.hr/files/minecraft-free-download-unblocked_GM479516143.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off00003045.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3045 23016 bytes
SHA-256: 56cdf8f097590b33c9914dfdda113b8cacc61f21aa36ad76c1d5fbbf7ab30b6d
font_01_sfnt_off000063d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x63D4 18612 bytes
SHA-256: ea471364580b19b0a285475b4c0f13c806daaecf8552f4a25a80e6b014191c7c

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