Malicious PDF — malware analysis report

Static analysis result for SHA-256 141f25c31e2bdbd5…

MALICIOUS

PDF

42.2 KB Created: 2021-05-13 05:57:23 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: fd62a1008aac06ef99965bddb325ef0e SHA-1: 82f2798668cc1793b2d82ccf3334b08db614405a SHA-256: 141f25c31e2bdbd57bd860680515a2c64c00fd201f57c488d50ba330f3a8cf33
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple embedded URLs that lead to known malicious redirectors, specifically advertising 'free generators' and 'game hacks' for popular games. The ML classifier strongly indicated maliciousness, and the presence of redirector links confirms a malicious workflow. The document likely aims to lure users to malicious sites that could lead to further compromise or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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/minecraft-realms-free-game-hack In PDF document text
    • http://www.fluidtech.hu/images/coinmaster-com_GM406889139.pdfIn PDF document text
    • http://www.fluidtech.hu/images/coin-master-free-spins-and-coins-hack_GM406889139.pdfIn PDF document text
    • http://www.fluidtech.hu/images/how-to-get-free-spins-on-coin-master-iphone_GM406889139.pdfIn PDF document text
    • http://www.fluidtech.hu/images/coin-master-coins_GM406889139.pdfIn PDF document text
    • http://www.fluidtech.hu/images/how-to-legally-get-free-spins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://www.fluidtech.hu/images/coin-master-free-coins-no-human-verification_GM406889139.pdfIn PDF document text
    • http://www.fluidtech.hu/images/cone-master_GM406889139.pdfIn PDF document text
    • http://www.fluidtech.hu/images/free-roblox-outfits_GM431946152.pdfIn PDF document text
    • http://www.fluidtech.hu/images/free-robux-without-any-verification_GM431946152.pdfIn PDF document text
    • http://www.fluidtech.hu/images/how-to-get-free-robux-without-downloading-anything_GM431946152.pdfIn PDF document text
    • http://www.fluidtech.hu/images/get-free-coins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://www.fluidtech.hu/images/coin-master-free-cards_GM406889139.pdfIn PDF document text
    • http://www.fluidtech.hu/images/coin-master-pc-hack-tool_GM406889139.pdfIn PDF document text
    • http://www.fluidtech.hu/images/free-spin-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://www.fluidtech.hu/images/coin-master-free-coins_GM406889139.pdfIn PDF document text
    • http://www.fluidtech.hu/images/coin-master-free-download-for-pc_GM406889139.pdfIn PDF document text
    • http://www.fluidtech.hu/images/coin-master-hack-with-lucky-patcher_GM406889139.pdfIn PDF document text
    • http://www.fluidtech.hu/images/roblox-fun-com-free-robux_GM431946152.pdfIn PDF document text
    • http://www.fluidtech.hu/images/coinmasterdailyfreespins-com_GM406889139.pdfIn PDF document text
    • http://www.fluidtech.hu/images/free-robux-ad_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
stream_003_off00004a1f.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4A1F 26232 bytes
SHA-256: 1c4c7596035becf9f1fd09ebafcd385b79aacf0ca1fd23ee61b0eb88680d4717
font_01_sfnt_off00008414.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8414 17900 bytes
SHA-256: badbc394cd8954733b164be5cc8c6ff402afbb9d7774d644eb4a8191a91f4c18

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