Malicious PDF — malware analysis report

Static analysis result for SHA-256 e742f1d1f911921f…

MALICIOUS

PDF

44.2 KB Created: 2021-05-17 12:08:00 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 771fad3a2ceb28e45a1270e26ec61939 SHA-1: a1ad0a1d60c34a0951872300b5f4e753006416c4 SHA-256: e742f1d1f911921f15a9e28dc87448541002cc53ce0f4ac4eaaa38aaa398b0ad
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF document contains multiple links to what appears to be a malicious redirector infrastructure, specifically advertising a 'Coin Master Spins Hack 2021'. The document body and embedded URLs strongly suggest a social engineering lure to trick users into visiting potentially harmful sites. While no scripts were explicitly extracted, the presence of numerous redirector links and the ML classification indicate a high likelihood of malicious intent, likely leading to further malware downloads or phishing attempts.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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/406889139/coin-master-spins-hack-2021-game-hack In PDF document text
    • http://www.buapit.ac.th/UserFiles/File/coin-master-online-hack-tool_GM406889139.pdfIn PDF document text
    • http://www.buapit.ac.th/UserFiles/File/coin-master-hack-download-2021_GM406889139.pdfIn PDF document text
    • http://www.buapit.ac.th/UserFiles/File/how-to-get-free-skins-in-roblox_GM431946152.pdfIn PDF document text
    • http://www.buapit.ac.th/UserFiles/File/free-robux-live_GM431946152.pdfIn PDF document text
    • http://www.buapit.ac.th/UserFiles/File/coin-master-free-spins-and-coins-haktuts_GM406889139.pdfIn PDF document text
    • http://www.buapit.ac.th/UserFiles/File/all-minecraft-handbooks_GM479516143.pdfIn PDF document text
    • http://www.buapit.ac.th/UserFiles/File/hack-coin-master-1_GM406889139.pdfIn PDF document text
    • http://www.buapit.ac.th/UserFiles/File/bloxpink-free-robux_GM431946152.pdfIn PDF document text
    • http://www.buapit.ac.th/UserFiles/File/master-free-spin-and-coin-links-html-m-1_GM406889139.pdfIn PDF document text
    • http://www.buapit.ac.th/UserFiles/File/minecraft-112-2-hacked-client_GM479516143.pdfIn PDF document text
    • http://www.buapit.ac.th/UserFiles/File/free-robux-generator-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://www.buapit.ac.th/UserFiles/File/working-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://www.buapit.ac.th/UserFiles/File/minecraft-free-download-android_GM479516143.pdfIn PDF document text
    • http://www.buapit.ac.th/UserFiles/File/free-minecraft-website_GM479516143.pdfIn PDF document text
    • http://www.buapit.ac.th/UserFiles/File/roblox-zone-free-robux_GM431946152.pdfIn PDF document text
    • http://www.buapit.ac.th/UserFiles/File/coin-master-jackpot-madness-hack_GM406889139.pdfIn PDF document text
    • http://www.buapit.ac.th/UserFiles/File/coin-master-mod-apk-free-download-for-android_GM406889139.pdfIn PDF document text
    • http://www.buapit.ac.th/UserFiles/File/free-robux-hacker-us_GM431946152.pdfIn PDF document text
    • http://www.buapit.ac.th/UserFiles/File/how-do-we-get-free-robux_GM431946152.pdfIn PDF document text
    • http://www.buapit.ac.th/UserFiles/File/how-to-create-group-in-coin-master-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_off00004e14.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4E14 26248 bytes
SHA-256: e9a629da8845e0580c2d302c463ba33072d81c7eadc6a50f7fc699207e1f5d5e
font_01_sfnt_off00008a58.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8A58 18296 bytes
SHA-256: eaa60ab3b9dbdc46d7aef4d77b4227c1d0aeb4180c3635ae77be6ae4ebf58c24

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