Malicious PDF — malware analysis report

Static analysis result for SHA-256 1f6408ee43e8980f…

MALICIOUS

PDF

45.4 KB Created: 2021-06-04 05:32:25 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 2e8f52b2989cce7b99e7823137994dde SHA-1: 52881f452bce417d5f4827c1d16c38b30988e141 SHA-256: 1f6408ee43e8980fbb417ba8463ecaa4784fb7acadecb49d88457b9d42bc4686
160 Risk Score

Malware Insights

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

The PDF contains a link disguised as a 'free generator / game hack' which redirects to malicious infrastructure. This lure is designed to trick users into visiting a potentially harmful site. The ML classifier also flagged this PDF as malicious, increasing confidence in its malicious intent. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9864

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 https://netcdn.online/app/479516143/free-minecraft-skin-maker-game-hack In PDF document text
    • http://pustaka1.unindra.id/repository/totally-free-coin-master-spins-2021_GM406889139.pdfIn PDF document text
    • http://pustaka1.unindra.id/repository/40-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://pustaka1.unindra.id/repository/master-coin-free-link_GM406889139.pdfIn PDF document text
    • http://pustaka1.unindra.id/repository/minecraft-java-edition-free_GM479516143.pdfIn PDF document text
    • http://pustaka1.unindra.id/repository/coin-master-free-2021-spin-link_GM406889139.pdfIn PDF document text
    • http://pustaka1.unindra.id/repository/free-robux-generator-without-verification_GM431946152.pdfIn PDF document text
    • http://pustaka1.unindra.id/repository/coin-master-daily-spin-free_GM406889139.pdfIn PDF document text
    • http://pustaka1.unindra.id/repository/free-robux-com_GM431946152.pdfIn PDF document text
    • http://pustaka1.unindra.id/repository/websites-that-give-you-free-robux_GM431946152.pdfIn PDF document text
    • http://pustaka1.unindra.id/repository/how-to-hack-coin-master-using-es-filer_GM406889139.pdfIn PDF document text
    • http://pustaka1.unindra.id/repository/minecraft-free-download-ios_GM479516143.pdfIn PDF document text
    • http://pustaka1.unindra.id/repository/free-hacks-for-coin-master_GM406889139.pdfIn PDF document text
    • http://pustaka1.unindra.id/repository/youtube-ninja-animation-free-roblox_GM431946152.pdfIn PDF document text
    • http://pustaka1.unindra.id/repository/worst-client_GM479516143.pdfIn PDF document text
    • http://pustaka1.unindra.id/repository/roblox-royale-high-diamond-hack_GM431946152.pdfIn PDF document text
    • http://pustaka1.unindra.id/repository/roblox-robux-hack_GM431946152.pdfIn PDF document text
    • http://pustaka1.unindra.id/repository/coin-master-free-spins-hack-apk-download_GM406889139.pdfIn PDF document text
    • http://pustaka1.unindra.id/repository/is-it-possible-to-hack-coin-master_GM406889139.pdfIn PDF document text
    • http://pustaka1.unindra.id/repository/coin-master-link_GM406889139.pdfIn PDF document text
    • http://pustaka1.unindra.id/repository/free-robux-master_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
stream_004_off00005116.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5116 28152 bytes
SHA-256: 1f837da49d09cf2fd7ee35328cfa48490bc8039b8456e2d2ffd1d3222b3dcc4c
font_01_sfnt_off000090b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x90B2 17740 bytes
SHA-256: 7e8236a58a56ce0148da12d4a95e9c7df934e3b28e502a8d8a58237e3f9d26f8

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