Malicious PDF — malware analysis report

Static analysis result for SHA-256 b646fef3fd7fc5f8…

MALICIOUS

PDF

44.3 KB Created: 2021-05-11 13:07:12 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 1278bc4fc85db68561820e1c22f2a184 SHA-1: 8bd7ca3939c116862efe9973f49750f09e28c7b7 SHA-256: b646fef3fd7fc5f811184cf960a0ff42d1909c031bd1d76539d0746861f57ffd
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document contains a lure for a 'free generator / game hack' related to Minecraft, directing users to a URL associated with malicious redirector infrastructure. The ML classifier strongly flagged this PDF as malicious, and the embedded link is a known indicator of malicious redirector activity. While no scripts were explicitly extracted, the PDF structure and embedded links suggest an attempt to exploit user interest in free game-related content to redirect them to potentially harmful sites.

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 https://netcdn.xyz/app/479516143/how-to-download-minecraft-windows-10-edition-for-free-game-hack In PDF document text
    • http://arkivthy.dk/images/is-minecraft-free-on-xbox-one_GM479516143.pdfIn PDF document text
    • http://arkivthy.dk/images/static-moonactive_GM406889139.pdfIn PDF document text
    • http://arkivthy.dk/images/how-to-get-free-robux-without-doing-anything_GM431946152.pdfIn PDF document text
    • http://arkivthy.dk/images/hack-the-game-coin-master_GM406889139.pdfIn PDF document text
    • http://arkivthy.dk/images/minecraft-linux-free_GM479516143.pdfIn PDF document text
    • http://arkivthy.dk/images/can-i-get-free-robux_GM431946152.pdfIn PDF document text
    • http://arkivthy.dk/images/free-coin-master-coins_GM406889139.pdfIn PDF document text
    • http://arkivthy.dk/images/robloxmatchcom-free-robux_GM431946152.pdfIn PDF document text
    • http://arkivthy.dk/images/roblox-money-hack_GM431946152.pdfIn PDF document text
    • http://arkivthy.dk/images/twitter-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://arkivthy.dk/images/hack-game-plus-com-coin-master_GM406889139.pdfIn PDF document text
    • http://arkivthy.dk/images/coin-master-free-spin-and-coins-links-2021_GM406889139.pdfIn PDF document text
    • http://arkivthy.dk/images/are-robux-generators-safe_GM431946152.pdfIn PDF document text
    • http://arkivthy.dk/images/free-robux-without-verification-or-survey_GM431946152.pdfIn PDF document text
    • http://arkivthy.dk/images/coin-master-fan-page-free-spins_GM406889139.pdfIn PDF document text
    • http://arkivthy.dk/images/minecraft-modded-client_GM479516143.pdfIn PDF document text
    • http://arkivthy.dk/images/app-for-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://arkivthy.dk/images/free-robux-gen_GM431946152.pdfIn PDF document text
    • http://arkivthy.dk/images/can-you-really-hack-coin-master-ios_GM406889139.pdfIn PDF document text
    • http://arkivthy.dk/images/coin-master-cheats-free-spins_GM406889139.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
stream_003_off00004d77.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4D77 27280 bytes
SHA-256: e4aff737acc342ac476966b389d1fb82abb22d6e502d4a1a6876b84980c1c521
font_01_sfnt_off00008963.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8963 18764 bytes
SHA-256: 21f431781c44949058772af5dafb642530c243ab7b82586e83b465fe58a13039

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