Malicious PDF — malware analysis report

Static analysis result for SHA-256 938606af211eeb9d…

MALICIOUS

PDF

34.3 KB Created: 2021-07-01 23:02:53 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 3283ce18682b9e2b16c0477a386ca903 SHA-1: 53602e0b16f8ee149b05617790527b65784af48e SHA-256: 938606af211eeb9d792bfea6613674f9eabca00e15af5c0b400d1678b0833197
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains a critical heuristic firing for a malicious redirector link, specifically advertising a 'free generator / game hack'. The document body and embedded URLs reinforce this lure, directing users to a URL that likely serves a malicious payload. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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.co/app/431946152/free-robux-with-inspect-2021-game-hack In PDF document text
    • https://fib.ub.ac.id/sac/repository/aprender-a-hackear-roblox_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac//repository/coin-master-daily-free-spin-and-coin-link-haktuts_GM406889139.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/hack-do-roblox-cs-go_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/free-roblox-accounts-2021-facebook_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/hack-coin-master-32-mod-apk_GM406889139.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/coin-master-link_GM406889139.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/roblox-lua-script-hacks-gui_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/top-cheat-limited-u-on-roblox_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/minecraft-rtx-download-free_GM479516143.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/vidio-how-to-hack-in-roblox_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/minecraft-pe-free-download-android_GM479516143.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/how-can-you-get-robux-in-roblox-for-free_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/coin-master-play-online-free_GM406889139.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/cb-ro-hack-roblox_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/free-roblox-shirts-templates_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/how-do-u-hack-roblox_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/how-to-get-free-robux-no-download-or-survey_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac//repository/roblox-got-talent-piano-hack_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/hacks-for-roblox-mac_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac//repository/roblox-free-hair-boy_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002ceb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2CEB 22364 bytes
SHA-256: d445aa4a7e8a70e871049972036d7210608bcbb6afef1688ad896159930b589e
font_01_sfnt_off00005e9f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5E9F 19884 bytes
SHA-256: a088dc0bba3ccf79fee90fa092662df808e763cf565c78c45671f53577c527f3

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