Malicious PDF — malware analysis report

Static analysis result for SHA-256 d0abec6fddfc181c…

MALICIOUS

PDF

34.9 KB Created: 2021-07-04 08:12:03 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: ce11136f71a1524123ab28f41d23b2db SHA-1: ae9ba391a5c0d5b45809dbec79ca86c75484a03b SHA-256: d0abec6fddfc181c97cf784e6f2152f3e50fc63d6c5c2af0c4182c95422fb0e7
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains embedded links that lead to a known malicious redirector infrastructure, specifically advertising game hacks and generators. The document body and heuristics confirm the lure is related to obtaining free in-game currency or hacks for popular games like Coin Master and Roblox. The primary malicious URL identified is http://netcdn.tw/app/406889139/coin-master-spins-hack-2021-game-hack, which is likely used to deliver a secondary payload or lead the user to a phishing 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-spins-hack-2021-game-hack In PDF document text
    • https://ourlady-elearning.com/userfiles/files/coin-master-free-spin-and-coin_GM406889139.pdfIn PDF document text
    • https://ourlady-elearning.com/userfiles/files/roblox-redeem_GM431946152.pdfIn PDF document text
    • https://ourlady-elearning.com/userfiles/files/minecraft-games-online-free-no-download_GM479516143.pdfIn PDF document text
    • https://ourlady-elearning.com/userfiles/files/how-to-get-free-robux-without-any-verification_GM431946152.pdfIn PDF document text
    • https://ourlady-elearning.com/userfiles/files/how-to-make-your-own-clothes-in-roblox-for-free_GM431946152.pdfIn PDF document text
    • https://ourlady-elearning.com/userfiles/files/how-to-hack-roblox-passwords_GM431946152.pdfIn PDF document text
    • https://ourlady-elearning.com/userfiles/files/how-to-hack-into-any-roblox-account-no-waiting_GM431946152.pdfIn PDF document text
    • https://ourlady-elearning.com/userfiles/files/coin-master-hack-without-verification-2021_GM406889139.pdfIn PDF document text
    • https://ourlady-elearning.com/userfiles/files/how-to-get-free-robux-2021-easy-on-ipad_GM431946152.pdfIn PDF document text
    • https://ourlady-elearning.com/userfiles/files/coin-master-cheat-free_GM406889139.pdfIn PDF document text
    • https://ourlady-elearning.com/userfiles/files/how-to-get-free-things-on-roblox_GM431946152.pdfIn PDF document text
    • https://ourlady-elearning.com/userfiles/files/how-to-get-free-robux-fast-and-easy-no-survey_GM431946152.pdfIn PDF document text
    • https://ourlady-elearning.com/userfiles/files/how-to-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • https://ourlady-elearning.com/userfiles/files/free-coin-spin-daily-link-coin-master_GM406889139.pdfIn PDF document text
    • https://ourlady-elearning.com/userfiles/files/roblox-free-akatsuki-shirt_GM431946152.pdfIn PDF document text
    • https://ourlady-elearning.com/userfiles/files/earn-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • https://ourlady-elearning.com/userfiles/files/free-roblox-accounts-2021-with-robux_GM431946152.pdfIn PDF document text
    • https://ourlady-elearning.com/userfiles/files/mcpe-hacks_GM479516143.pdfIn PDF document text
    • https://ourlady-elearning.com/userfiles/files/free-robux-codes-pins_GM431946152.pdfIn PDF document text
    • https://ourlady-elearning.com/userfiles/files/get-free-hat-in-roblox_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_off000031cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x31CF 22732 bytes
SHA-256: 8ee67132dae68e8cf694e5324ddc53e4954ed37ca8d10219c422b220e4842a8c
font_01_sfnt_off00006482.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6482 18580 bytes
SHA-256: 63d6adc7563b485c3174704ac8a7a6a262dc9bf1deaf17837918a23c7f43ebb5

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