Malicious PDF — malware analysis report

Static analysis result for SHA-256 480728a26815e2f5…

MALICIOUS

PDF

35.6 KB Created: 2021-06-26 19:15:52 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 4c4279960204f7b096867960a4a4101c SHA-1: 63465ba478c585a77a0029c811a0855d8b54acbc SHA-256: 480728a26815e2f5c65bd9f14b714e35aaffb6ad19e37cf4f50e1f497f25ec6a
160 Risk Score

Malware Insights

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

The PDF contains a lure for 'free Robux' and 'game hacks', directing users to a URL associated with malicious redirector infrastructure. This indicates a phishing attempt designed to lead users to potentially harmful content or further malware. The ML classifier also strongly flagged this PDF as malicious.

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-claim-your-reward-game-hack In PDF document text
    • http://repository.poliven.ac.id/repository/roblox-hack-com_GM431946152.pdfIn PDF document text
    • http://repository.poliven.ac.id/repository/coin-master-hack-without-verification_GM406889139.pdfIn PDF document text
    • http://repository.poliven.ac.id//repository/coin-master-free-spins-cheat-deutsch_GM406889139.pdfIn PDF document text
    • http://repository.poliven.ac.id//repository/free-ways-to-get-robux_GM431946152.pdfIn PDF document text
    • http://repository.poliven.ac.id/repository/how-to-gain-more-spins-on-coin-master-for-free_GM406889139.pdfIn PDF document text
    • http://repository.poliven.ac.id//repository/minecraft-gun-games-free_GM479516143.pdfIn PDF document text
    • http://repository.poliven.ac.id//repository/toolbox-for-minecraft-pe-ios_GM479516143.pdfIn PDF document text
    • http://repository.poliven.ac.id/repository/how-to-get-a-lua-injector-for-hacking-roblox-free_GM431946152.pdfIn PDF document text
    • http://repository.poliven.ac.id//repository/how-to-send-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://repository.poliven.ac.id/repository/hot-get-get-unbanned-in-roblox-hack_GM431946152.pdfIn PDF document text
    • http://repository.poliven.ac.id//repository/how-to-use-scripts-in-roblox-hack_GM431946152.pdfIn PDF document text
    • http://repository.poliven.ac.id/repository/mega-roblox-hack-engine_GM431946152.pdfIn PDF document text
    • http://repository.poliven.ac.id/repository/free-coin-master-spins-link-download_GM406889139.pdfIn PDF document text
    • http://repository.poliven.ac.id//repository/how-to-get-free-spins-on-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://repository.poliven.ac.id//repository/games-on-roblox-that-give-you-free-robux_GM431946152.pdfIn PDF document text
    • http://repository.poliven.ac.id/repository/i-roblox-beeing-hacked_GM431946152.pdfIn PDF document text
    • http://repository.poliven.ac.id/repository/how-to-get-minecraft-for-free-on-xbox-one_GM479516143.pdfIn PDF document text
    • http://repository.poliven.ac.id/repository/microsoft-bing-robux_GM431946152.pdfIn PDF document text
    • http://repository.poliven.ac.id/repository/free-400-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://repository.poliven.ac.id//repository/how-to-get-free-robux-without-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_off000033b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x33B7 22056 bytes
SHA-256: 53fa61f0acec2cc3e2c9fc4bc8ed1e1e6e3e9b27be3bda54594f65553f8a0f76
font_01_sfnt_off00006482.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6482 19672 bytes
SHA-256: 8dae36f5bd161453efad957433a1321c8643895b2c21995b20bcb5730193f3e1

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