Malicious PDF — malware analysis report

Static analysis result for SHA-256 9884903d2fff073b…

MALICIOUS

PDF

48.5 KB Created: 2021-06-03 10:56:02 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 6159631c16d97c941aba3570f72b4259 SHA-1: 1285bf46981e2b10f3b93ee96f67f215f2f4ebcd SHA-256: 9884903d2fff073bc00bcd87ff0ea2356c05715ea6f22659c91ea4c5d7ba82c4
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links pointing to known malicious redirectors, specifically advertising 'free generators' or 'game hacks' for popular games. The primary malicious URL identified is https://netcdn.online/app/431946152/getrobux-come-game-hack. While no scripts were explicitly extracted, the PDF structure and heuristic firings indicate it's designed to exploit user interest in free in-game items to redirect them to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9796

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.online/app/431946152/getrobux-come-game-hack In PDF document text
    • http://library.yamasi.ac.id//repository/free-attacks-coin-master_GM406889139.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/hack-to-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://library.yamasi.ac.id//repository/100-free-spins-coin-master-link_GM406889139.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/coin-master-fun-free-spins_GM406889139.pdfIn PDF document text
    • http://library.yamasi.ac.id//repository/coins-master-hack_GM406889139.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/do-you-get-minecraft-windows-10-for-free_GM479516143.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/free-minecraft-skin-packs_GM479516143.pdfIn PDF document text
    • http://library.yamasi.ac.id//repository/how-do-you-get-roebucks-for-free_GM431946152.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/roblox-free-hats_GM431946152.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/http-coin-master-hack-club_GM406889139.pdfIn PDF document text
    • http://library.yamasi.ac.id//repository/coin-master-free-spins-app-for-iphone_GM406889139.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/free-robux-games_GM431946152.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/free-roblox-executor-no-key_GM431946152.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/coin-master-free-spins-and-coins-blogspot_GM406889139.pdfIn PDF document text
    • http://library.yamasi.ac.id//repository/free-roblox-card-codes_GM431946152.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/coin-master-date-and-time-hack_GM406889139.pdfIn PDF document text
    • http://library.yamasi.ac.id//repository/appsmob-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://library.yamasi.ac.id//repository/free-minecraft-mods-for-xbox-one_GM479516143.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/get-robux_GM431946152.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/wurst-18-9_GM479516143.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
stream_004_off000050ce.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x50CE 28260 bytes
SHA-256: ba6cd4c05c264d116cc2e86434ac5cfc900641f5f5267696ccafab5eef111a44
font_01_sfnt_off00009115.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9115 2880 bytes
SHA-256: b053084cafd01c649462d87667ba56c569d6480ce60e7d20ae57ef6124cf178e
font_02_sfnt_off00009b00.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9B00 18216 bytes
SHA-256: eccbe16884f1372dd0d8c57c88e5bc61ee7bcfafa4ac6286ca85878eadaf1272

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