Malicious PDF — malware analysis report

Static analysis result for SHA-256 5d8cdbe4f79ca42b…

MALICIOUS

PDF

52.6 KB Created: 2021-06-08 11:36:38 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-18
MD5: df3f8c8629708c62ed9a4e72e18f4158 SHA-1: fbae12952456154b472f5a03fee52e50d08d1c2d SHA-256: 5d8cdbe4f79ca42bb330f059320c8d7dde1b423fc6e55507d8e82c3e0c611ae2
200 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9657

Heuristics 5

  • 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.
  • Brand-impersonation credential phishing lure high SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: call-to-action link host does not match the impersonated brand: https://netcdn.tw/app/431946152/roblox-apocalypse-rising-spawn-hack-2021-game-hack.
  • 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.tw/app/431946152/roblox-apocalypse-rising-spawn-hack-2021-game-hack In PDF document text
    • https://perpus.uwhs.ac.id/repository/free-robux-hack-no-human-verification-or-survey_GM431946152.pdfIn PDF document text
    • https://perpus.uwhs.ac.id/repository/no-human-verification_GM431946152.pdfIn PDF document text
    • https://perpus.uwhs.ac.id/repository/free-minecraft-accounts-reddit_GM479516143.pdfIn PDF document text
    • https://perpus.uwhs.ac.id/repository/can-i-download-minecraft-for-free_GM479516143.pdfIn PDF document text
    • https://perpus.uwhs.ac.id/repository/roblox-fly-hack_GM431946152.pdfIn PDF document text
    • https://perpus.uwhs.ac.id/repository/roblox-hacking-website_GM431946152.pdfIn PDF document text
    • https://perpus.uwhs.ac.id/repository/minecraft-bedrock-edition-hacks_GM479516143.pdfIn PDF document text
    • https://perpus.uwhs.ac.id/repository/coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • https://perpus.uwhs.ac.id/repository/coin-master-32-android-mod-hack-apk-download_GM406889139.pdfIn PDF document text
    • https://perpus.uwhs.ac.id/repository/coin-master-hack-free-spins_GM406889139.pdfIn PDF document text
    • https://perpus.uwhs.ac.id/repository/roblox-apocalypse-rising-hack_GM431946152.pdfIn PDF document text
    • https://perpus.uwhs.ac.id/repository/free-robux-today_GM431946152.pdfIn PDF document text
    • https://perpus.uwhs.ac.id/repository/get-free-robux-now_GM431946152.pdfIn PDF document text
    • https://perpus.uwhs.ac.id/repository/how-to-get-free-robux-hack_GM431946152.pdfIn PDF document text
    • https://perpus.uwhs.ac.id/repository/how-to-hack-roblox-to-get-robux_GM431946152.pdfIn PDF document text
    • https://perpus.uwhs.ac.id/repository/daily-free-spin-coin-master-link_GM406889139.pdfIn PDF document text
    • https://perpus.uwhs.ac.id/repository/how-to-change-your-name-in-roblox-for-free_GM431946152.pdfIn PDF document text
    • https://perpus.uwhs.ac.id/repository/free-robux-without-downloading-apps_GM431946152.pdfIn PDF document text
    • https://perpus.uwhs.ac.id/repository/real-free-robux-codes_GM431946152.pdfIn PDF document text
    • https://perpus.uwhs.ac.id/repository/master-free-spin-and-coin-link_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00005106.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5106 27708 bytes
SHA-256: e48550bb45b72f0ee9cd2fd3152fd916f09c4291bb7f1713165bc388610f4cfd
font_01_sfnt_off0000900e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x900E 2824 bytes
SHA-256: 94c1b019735d7e491765340abe50b2897410e2ec65ecf141c08bd9f2220897c4
font_02_sfnt_off000099b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x99B8 5696 bytes
SHA-256: 450e3ee45915afe13702bf1d587eb8b9ad88a8d2113419ac9f2fd116a828e139
font_03_sfnt_off0000a6ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA6CA 19512 bytes
SHA-256: e02ed4abbc88e8a9c2b335ed146828c76f0ee6f2019b7af07073b93ed02262b1

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