Malicious PDF — malware analysis report

Static analysis result for SHA-256 e759244df4df9eff…

MALICIOUS

PDF

32.4 KB Created: 2021-07-05 19:06:04 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: a1304515ca72db55d6661e80c4c4e8c7 SHA-1: a9bf85f2c56a53590531ea842287ec077a562ec8 SHA-256: e759244df4df9eff0c785770e0c3d839a071312c857fe82d43bb2035c5d95de3
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded URLs and a prominent call-to-action for a "Robux Generator", strongly suggesting a phishing or scam attempt. The ML classifier also flagged this PDF as malicious. The presence of external URIs indicates the document is designed to redirect users to potentially harmful websites.

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/roblox-free-accessories-game-hack In PDF document text
    • https://fib.ub.ac.id/sac/repository/minecraft-hacks-pc_GM479516143.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/free-robux-games_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/how-to-get-free-spins-on-coin-master-facebook_GM406889139.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/hack-to-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/free-robux-no-verification-no-download-2021_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/free-team-deathmatch-map-roblox_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/how-to-get-free-hair-roblox-2021_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/how-to-get-free-hats-for-free-no-inspect-roblox_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/free-game-packs-for-coin-master_GM406889139.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/skrillix-wolf-roblox-free-robux_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac//repository/how-to-free-robux_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/how-to-get-pants-for-free-on-roblox-without-bc_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/coin-master-free-link-2021_GM406889139.pdfIn PDF document text
    • https://fib.ub.ac.id/sac//repository/how-to-get-free-spins-on-coin-master-2021-iphone_GM406889139.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/mobile-hack-net-roblox_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac//repository/roblox-fun-robux_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/hack-jump-roblox_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac//repository/wurst-client-download_GM479516143.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/roblox-f3x-hack_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_off00002a4c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2A4C 21836 bytes
SHA-256: f07570858daa9d6267e04341e6bc93e97d516eec4060c68861f29f0d20cdcf4b
font_01_sfnt_off00005ab7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5AB7 18768 bytes
SHA-256: 43a1c2d0afcd82e775e61e55c2e0c8a016c3844b087109c53c024c689feb06a9

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