Malicious PDF — malware analysis report

Static analysis result for SHA-256 f83796b6db4f4731…

MALICIOUS

PDF

33.0 KB Created: 2021-07-03 19:30:11 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 370825683bdfc6fb55e9d285576b89df SHA-1: c916835440fdcefb0593f00cdd18ec09529aea8e SHA-256: f83796b6db4f47310cd15fe2100e1dc3f72afd6797d8d4b8eeb3baf7d94b62b1
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains embedded links that redirect to known malicious infrastructure, specifically promoting 'game hacks' and 'robux generators'. The ML classifier also flagged this PDF as malicious. The primary lure appears to be a fake 'grab points login' page, likely leading to credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9824

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.tw/app/431946152/grab-points-login-game-hack In PDF document text
    • http://akbidprimahusada.ac.id/elibrary//repository/robux-hack-free-robux_GM431946152.pdfIn PDF document text
    • https://akbidprimahusada.ac.id/elibrary/repository/unendlich-robux-hack_GM431946152.pdfIn PDF document text
    • http://akbidprimahusada.ac.id/elibrary/repository/pokemon-go-free-or-shadow-mewtwo_GM1094591345.pdfIn PDF document text
    • http://akbidprimahusada.ac.id/elibrary/repository/coin-master-free-500-spins-link_GM406889139.pdfIn PDF document text
    • http://akbidprimahusada.ac.id/elibrary//repository/how-to-hack-coin-master-game-without-root_GM406889139.pdfIn PDF document text
    • https://akbidprimahusada.ac.id/elibrary/repository/como-se-puede-ser-hacker-en-roblox_GM431946152.pdfIn PDF document text
    • http://akbidprimahusada.ac.id/elibrary/repository/free-robux-com-2021_GM431946152.pdfIn PDF document text
    • http://akbidprimahusada.ac.id/elibrary//repository/bloxland-earn-free-robux_GM431946152.pdfIn PDF document text
    • http://akbidprimahusada.ac.id/elibrary//repository/roblox-troll-outfits-free_GM431946152.pdfIn PDF document text
    • https://akbidprimahusada.ac.id/elibrary/repository/free-roblox-thomas-and-friends-the-great-race-online_GM431946152.pdfIn PDF document text
    • http://akbidprimahusada.ac.id/elibrary/repository/bleu-hack-roblox-download-free_GM431946152.pdfIn PDF document text
    • https://akbidprimahusada.ac.id/elibrary/repository/how-to-get-free-followers-on-roblox_GM431946152.pdfIn PDF document text
    • http://akbidprimahusada.ac.id/elibrary/repository/coin-master-hack-here_GM406889139.pdfIn PDF document text
    • http://akbidprimahusada.ac.id/elibrary/repository/free-robux-thumbnail_GM431946152.pdfIn PDF document text
    • http://akbidprimahusada.ac.id/elibrary/repository/free-robux-legit_GM431946152.pdfIn PDF document text
    • http://akbidprimahusada.ac.id/elibrary/repository/free-robux-no-verification-no-download_GM431946152.pdfIn PDF document text
    • http://akbidprimahusada.ac.id/elibrary//repository/free-spin-today-coin-master_GM406889139.pdfIn PDF document text
    • https://akbidprimahusada.ac.id/elibrary/repository/roblox-gui-hack-download_GM431946152.pdfIn PDF document text
    • https://akbidprimahusada.ac.id/elibrary/repository/roblox-server-hack-download_GM431946152.pdfIn PDF document text
    • http://akbidprimahusada.ac.id/elibrary/repository/free-robux-for-kids-no-verification_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
font_00_sfnt_off00002b15.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2B15 22556 bytes
SHA-256: 28371a98892500df227a5f99b9dacee53701c4143bc3170def7445a56dcfd6a9
font_01_sfnt_off00005d7c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5D7C 18580 bytes
SHA-256: 2c24762620d9d623288236fe8aa88065cccc78c6fb64bc2c26f1a488593870f7

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