Malicious PDF — malware analysis report

Static analysis result for SHA-256 aa87a8b2cd9c27f0…

MALICIOUS

PDF

52.4 KB Created: 2021-06-07 07:00:38 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-07
MD5: 3de79bc9f9a09d94c40e0fd6f60685fa SHA-1: b3e49a6ca76372d2f2dc932905157b6dbd3d45a3 SHA-256: aa87a8b2cd9c27f0e58033957d6bb7577492aef514400ee2797811109247664c
160 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9586

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.tw/app/431946152/how-to-download-hack-roblox-jailbreak-game-hack In PDF document text
    • https://perpustakaan.smp1madiun.sch.id/repository/free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://perpustakaan.smp1madiun.sch.id/repository/minecraft-windows-10-free-code_GM479516143.pdfIn PDF document text
    • https://perpustakaan.smp1madiun.sch.id/repository/minecraft-free-download-pc_GM479516143.pdfIn PDF document text
    • https://perpustakaan.smp1madiun.sch.id/repository/minecraft-pc-free_GM479516143.pdfIn PDF document text
    • https://perpustakaan.smp1madiun.sch.id/repository/how-to-get-free-robux-without-verification_GM431946152.pdfIn PDF document text
    • https://perpustakaan.smp1madiun.sch.id/repository/free-spin-link-for-coin-master-game_GM406889139.pdfIn PDF document text
    • https://perpustakaan.smp1madiun.sch.id/repository/how-to-hack-to-get-robux_GM431946152.pdfIn PDF document text
    • https://perpustakaan.smp1madiun.sch.id/repository/free-spin-coin-master-2021-link_GM406889139.pdfIn PDF document text
    • https://perpustakaan.smp1madiun.sch.id/repository/free-fan-club-groups-roblox_GM431946152.pdfIn PDF document text
    • https://perpustakaan.smp1madiun.sch.id/repository/minecraft-windows-10-free_GM479516143.pdfIn PDF document text
    • https://perpustakaan.smp1madiun.sch.id/repository/speed-hack-roblox-2021_GM431946152.pdfIn PDF document text
    • https://perpustakaan.smp1madiun.sch.id/repository/free-robux-scams_GM431946152.pdfIn PDF document text
    • https://perpustakaan.smp1madiun.sch.id/repository/minecraft-pe-free-download_GM479516143.pdfIn PDF document text
    • https://perpustakaan.smp1madiun.sch.id/repository/roblox-2021-hack_GM431946152.pdfIn PDF document text
    • https://perpustakaan.smp1madiun.sch.id/repository/free-robux-games_GM431946152.pdfIn PDF document text
    • https://perpustakaan.smp1madiun.sch.id/repository/coin-master-free-spins-and-coins-blogspot_GM406889139.pdfIn PDF document text
    • https://perpustakaan.smp1madiun.sch.id/repository/free-ways-to-get-robux_GM431946152.pdfIn PDF document text
    • https://perpustakaan.smp1madiun.sch.id/repository/how-to-hack-someones-roblox-account_GM431946152.pdfIn PDF document text
    • https://perpustakaan.smp1madiun.sch.id/repository/coin-master-hack-app_GM406889139.pdfIn PDF document text
    • https://perpustakaan.smp1madiun.sch.id/repository/free-robux-ad_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000051cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x51CB 30096 bytes
SHA-256: cfa973967b631b8200a46b251e3eb7e80e3bcd2d6583eb5ea3208d243244a29a
font_01_sfnt_off000096e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x96E1 7272 bytes
SHA-256: f462303657ce1de10d3e7d5ae1fe17c8584116bd5bc216971166de87266da924
font_02_sfnt_off0000a852.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA852 18972 bytes
SHA-256: d27c708d460165d0dde196fdaf79ff2f9db515971c0f90508011ea2ceb746db2

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