Malicious PDF — malware analysis report

Static analysis result for SHA-256 8def107ea6db109f…

MALICIOUS

PDF

34.5 KB Created: 2021-07-05 12:28:58 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: e4b2ca394e1e47dc14e4b08324d6a6a6 SHA-1: 6a8a96459e42da99b25f64212f2b484b9aecf8e8 SHA-256: 8def107ea6db109f47728e16b34f974a029a24d4695c3529d52f9e5a93b7c79c
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document employs a lure of free game hacks and in-game currency to entice users. It contains multiple links to known malicious redirector infrastructure, such as http://netcdn.tw/app/479516143/free-minecraft-survival-server-game-hack. The presence of these links and the ML classifier's high confidence score indicate a malicious intent to redirect users to potentially harmful sites. No scripts were extracted, but the document's structure and embedded URLs strongly suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9983

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/479516143/free-minecraft-survival-server-game-hack In PDF document text
    • http://lib.stimykpn.ac.id//repository/download-minecraft-free-hiapphere_GM479516143.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/free-minecraft-mods-for-pc_GM479516143.pdfIn PDF document text
    • http://lib.stimykpn.ac.id//repository/how-to-change-your-roblox-username-for-free-2021_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/get-100-000-000-000-000-000-robux-for-free_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/roblox-work-at-a-pizza-place-cheats_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/free-tokyo-ghoul-shirts-roblox_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/coin-master-free-coins-link-march-2021_GM406889139.pdfIn PDF document text
    • http://lib.stimykpn.ac.id//repository/robux-hack-no-human-verification_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/roblox-assassin-free-tokens_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/free-coin-master-hacks-no-verification_GM406889139.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/gold-cards-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/roblox-how-to-make-a-anti-cheat-system_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/robux-generator-without-human-verification_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/can-simeone-hack-your-roblox-account-theough-discord_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/roblox-codes-cheats_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/free-robux-giveaway-live-stream-now_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/roblox-booga-booga-hack_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/coin-master-hack-without-human-verification-2021_GM406889139.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/free-hair-roblox-boy_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/how-to-make-a-roblox-hack-in-2021_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_off0000348a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x348A 21952 bytes
SHA-256: 58061ccbb1ed9bd20a1875e145bac3d6847276a1e861669d22ba5276405582ad
font_01_sfnt_off0000646e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x646E 18184 bytes
SHA-256: aa4b263e48621cfecba3d9fc0f6d5ba7bc8503c5f36487cc72bd4c38d51a6610

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