Malicious PDF — malware analysis report

Static analysis result for SHA-256 c5d742776e569ed2…

MALICIOUS

PDF

35.0 KB Created: 2021-07-09 17:04:10 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-28
MD5: cf005d9e835dc877a176c8e621c85247 SHA-1: 7264046f2479e4d06cc524318e0472e76f713802 SHA-256: c5d742776e569ed22871194529977d4a6759f14f8a01a9ec804787991e898369
160 Risk Score

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/431946152/free-robux-no-human-verification-no-survey-game-hack In PDF document text
    • https://elearning.masultanhadlirin.sch.id/__statics/gudangsoal/files/free-links-for-coin-master_GM406889139.pdfIn PDF document text
    • https://elearning.masultanhadlirin.sch.id/__statics/gudangsoal/files/roblox-free-2021-robux_GM431946152.pdfIn PDF document text
    • https://elearning.masultanhadlirin.sch.id/__statics/gudangsoal/files/how-to-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://elearning.masultanhadlirin.sch.id/__statics/gudangsoal/files/free-roblox-gift-card_GM431946152.pdfIn PDF document text
    • https://elearning.masultanhadlirin.sch.id/__statics/gudangsoal/files/how-to-change-your-name-in-roblox-for-free_GM431946152.pdfIn PDF document text
    • https://elearning.masultanhadlirin.sch.id/__statics/gudangsoal/files/how-to-get-free-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://elearning.masultanhadlirin.sch.id/__statics/gudangsoal/files/free-magical-chest-coin-master_GM406889139.pdfIn PDF document text
    • https://elearning.masultanhadlirin.sch.id/__statics/gudangsoal/files/wild-and-free-serena-ryder-id-roblox_GM431946152.pdfIn PDF document text
    • https://elearning.masultanhadlirin.sch.id/__statics/gudangsoal/files/flame-gg-free-robux_GM431946152.pdfIn PDF document text
    • https://elearning.masultanhadlirin.sch.id/__statics/gudangsoal/files/free-robux-no-verification-2021_GM431946152.pdfIn PDF document text
    • https://elearning.masultanhadlirin.sch.id/__statics/gudangsoal/files/how-do-you-get-roblox-for-free_GM431946152.pdfIn PDF document text
    • https://elearning.masultanhadlirin.sch.id/__statics/gudangsoal/files/coin-master-spin-ml-link_GM406889139.pdfIn PDF document text
    • https://elearning.masultanhadlirin.sch.id/__statics/gudangsoal/files/roblox-free-clothes-codes_GM431946152.pdfIn PDF document text
    • https://elearning.masultanhadlirin.sch.id/__statics/gudangsoal/files/coin-master-spin-hack-2021_GM406889139.pdfIn PDF document text
    • https://elearning.masultanhadlirin.sch.id/__statics/gudangsoal/files/roblox-hack-v2-1b_GM431946152.pdfIn PDF document text
    • https://elearning.masultanhadlirin.sch.id/__statics/gudangsoal/files/mcpe_GM479516143.pdfIn PDF document text
    • https://elearning.masultanhadlirin.sch.id/__statics/gudangsoal/files/free-robux-hack-com-no-human-verification_GM431946152.pdfIn PDF document text
    • https://elearning.masultanhadlirin.sch.id/__statics/gudangsoal/files/free-robux-without-any-verification_GM431946152.pdfIn PDF document text
    • https://elearning.masultanhadlirin.sch.id/__statics/gudangsoal/files/coin-master-free-spins-and-chips_GM406889139.pdfIn PDF document text
    • https://elearning.masultanhadlirin.sch.id/__statics/gudangsoal/files/minecraft-hacked-client-download_GM479516143.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_off0000312c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x312C 22060 bytes
SHA-256: eb4ece19217e99c2118282b48b18e9c5cbba5b6689803a9ccebf661ad9af9afc
font_01_sfnt_off00006223.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6223 19628 bytes
SHA-256: 09331f1d479b06632facb78648812f66193fe8c97927eaaaed4247988ab7ba01

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