Malicious PDF — malware analysis report

Static analysis result for SHA-256 af2a745a3c5135ab…

MALICIOUS

PDF

42.1 KB Created: 2021-05-11 19:33:35 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-21
MD5: 4731e9f6ee9900daee581e03ddf5b1d6 SHA-1: d636ca57818a0221ae4ffb5fadac313898fff25c SHA-256: af2a745a3c5135ab831e479db255036fcc9dd56dafc84c4ca31fbb0d158576c3
160 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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.xyz/app/406889139/coin-master-online-hack-download-game-hack In PDF document text
    • http://perpustakaan.pa-jember.go.id/repository/coin-master-link_GM406889139.pdfIn PDF document text
    • http://perpustakaan.pa-jember.go.id/repository/whats-robux_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pa-jember.go.id/repository/minecraft-mods-download-free_GM479516143.pdfIn PDF document text
    • http://perpustakaan.pa-jember.go.id/repository/get-free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://perpustakaan.pa-jember.go.id/repository/minecraft-pocket-edition-apk-free-download_GM479516143.pdfIn PDF document text
    • http://perpustakaan.pa-jember.go.id/repository/50-free-spins-coin-master-links_GM406889139.pdfIn PDF document text
    • http://perpustakaan.pa-jember.go.id/repository/how-to-hack-coin-master-facebook_GM406889139.pdfIn PDF document text
    • http://perpustakaan.pa-jember.go.id/repository/coin-master-daily-free-spins-link-blogspot_GM406889139.pdfIn PDF document text
    • http://perpustakaan.pa-jember.go.id/repository/robux-hacks-2021_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pa-jember.go.id/repository/girl-roblox-avatar_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pa-jember.go.id/repository/minecraft-hacks-wurst_GM479516143.pdfIn PDF document text
    • http://perpustakaan.pa-jember.go.id/repository/mcpe-master-hack-unlimited-coins-download_GM406889139.pdfIn PDF document text
    • http://perpustakaan.pa-jember.go.id/repository/best-way-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pa-jember.go.id/repository/coin-free-master_GM406889139.pdfIn PDF document text
    • http://perpustakaan.pa-jember.go.id/repository/free-spins-on-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://perpustakaan.pa-jember.go.id/repository/coin-master-free-spins-16-04-19_GM406889139.pdfIn PDF document text
    • http://perpustakaan.pa-jember.go.id/repository/coin-master-free-coins-and-spins-link_GM406889139.pdfIn PDF document text
    • http://perpustakaan.pa-jember.go.id/repository/www-free-robux_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pa-jember.go.id/repository/minecraft-cheat-client_GM479516143.pdfIn PDF document text
    • http://perpustakaan.pa-jember.go.id/repository/roblox-gang-rape_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_003_off00004876.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4876 25088 bytes
SHA-256: e7a6a0597aebd274a228f67996fc26f2448c3b2b6e4e84d0d0ce74df122659f4
font_01_sfnt_off000081e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x81E0 18296 bytes
SHA-256: a91dad97805a851d4d9dd61317d1e51430e69d3f7e26ebf67d6b1ffe25e57ed6