Malicious PDF — malware analysis report

Static analysis result for SHA-256 191274c0360fa7e4…

MALICIOUS

PDF

34.5 KB Created: 2021-06-20 02:29:00 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-22
MD5: d7e79630c9075053afe05aecc9d6e88b SHA-1: 2143789fc3e8573de5134b19d5732d58320a7da1 SHA-256: 191274c0360fa7e4a895ed5da091ba45e86a3910bea5bbe1fb85f4476a06abf5
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.co/app/431946152/robux-gratis-hack-descargar-game-hack In PDF document text
    • https://perpustakaan.stifar.ac.id/repository/how-to-get-free-robux-on-computer_GM431946152.pdfIn PDF document text
    • https://perpustakaan.stifar.ac.id/repository/free-roblox-followers-generator_GM431946152.pdfIn PDF document text
    • https://perpustakaan.stifar.ac.id/repository/how-to-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • https://perpustakaan.stifar.ac.id/repository/dragon-keeper-roblox-cheats_GM431946152.pdfIn PDF document text
    • https://perpustakaan.stifar.ac.id/repository/how-to-get-coins-on-pokemon-go-free_GM1094591345.pdfIn PDF document text
    • https://perpustakaan.stifar.ac.id/repository/easy-way-to-get-free-robux-on-ipad_GM431946152.pdfIn PDF document text
    • https://perpustakaan.stifar.ac.id/repository/coin-master-unlimited-spin-apk-free-download_GM406889139.pdfIn PDF document text
    • https://perpustakaan.stifar.ac.id/repository/coin-master-hack-apk_GM406889139.pdfIn PDF document text
    • https://perpustakaan.stifar.ac.id/repository/hacker-fedora-shirt-roblox_GM431946152.pdfIn PDF document text
    • https://perpustakaan.stifar.ac.id/repository/hack-coin-master-android-game_GM406889139.pdfIn PDF document text
    • https://perpustakaan.stifar.ac.id/repository/coin-master-free-spins-and-coins-daily_GM406889139.pdfIn PDF document text
    • https://perpustakaan.stifar.ac.id/repository/roblox-free-group-generator_GM431946152.pdfIn PDF document text
    • https://perpustakaan.stifar.ac.id/repository/coin-master-free-spin-ml_GM406889139.pdfIn PDF document text
    • https://perpustakaan.stifar.ac.id/repository/coin-master-free-spins-and-coins-daily-links_GM406889139.pdfIn PDF document text
    • https://perpustakaan.stifar.ac.id/repository/coin-master-ids-for-free-spins_GM406889139.pdfIn PDF document text
    • https://perpustakaan.stifar.ac.id/repository/how-to-know-if-ur-being-hacked-on-roblox_GM431946152.pdfIn PDF document text
    • https://perpustakaan.stifar.ac.id/repository/roblox-mobile-hack_GM431946152.pdfIn PDF document text
    • https://perpustakaan.stifar.ac.id/repository/free-robux-without-downloading-anything_GM431946152.pdfIn PDF document text
    • https://perpustakaan.stifar.ac.id/repository/did-roblox-get-hacked-in-2021_GM431946152.pdfIn PDF document text
    • https://perpustakaan.stifar.ac.id/repository/hacks-para-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
stream_002_off00002fbb.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2FBB 22408 bytes
SHA-256: 62fc4cab969f6e95e22dacec0fa71da651925e0b4d8e47cbf9a818f0ac942d21
font_01_sfnt_off00006180.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6180 19112 bytes
SHA-256: bfec6769be470f815917ad02f4cb9750a98567c68c510745b394b200630b4481

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