Malicious PDF — malware analysis report

Static analysis result for SHA-256 d7edc1d96dc9820b…

MALICIOUS

PDF

34.7 KB Created: 2021-07-08 20:45:02 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 5e5041c6d0c15ddde2a5f98cc570ce16 SHA-1: c91a79e2f3ed9f9dae7b25a41997355ff8c049bc SHA-256: d7edc1d96dc9820bec3e1379ae0ee2ba157de83a7811c6070f56a49858a8590f
160 Risk Score

Malware Insights

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

The PDF contains multiple links to known malicious redirectors and lures users with promises of game hacks and free currency. The primary link, http://netcdn.tw/app/406889139/free-spins-coin-master-haktuts-game-hack, is identified as a malicious redirector. While no scripts were explicitly extracted, the PDF structure and embedded links suggest an attempt to exploit vulnerabilities or trick users into downloading further malicious content, likely through a drive-by download or a social engineering pretext.

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.tw/app/406889139/free-spins-coin-master-haktuts-game-hack In PDF document text
    • http://librarystkippgribl.com/repository/how-do-you-install-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://librarystkippgribl.com/repository/easy-how-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://librarystkippgribl.com/repository/hack-coin-master-using-pc_GM406889139.pdfIn PDF document text
    • http://librarystkippgribl.com/repository/legit-coin-master-hack-site-zyngaplayerforumscom_GM406889139.pdfIn PDF document text
    • http://librarystkippgribl.com/repository/how-to-robux_GM431946152.pdfIn PDF document text
    • http://librarystkippgribl.com/repository/free-custom-minecraft-skins_GM479516143.pdfIn PDF document text
    • http://librarystkippgribl.com//repository/pubg-uc-gift-card_GM1330123889.pdfIn PDF document text
    • http://librarystkippgribl.com//repository/how-to-get-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • http://librarystkippgribl.com//repository/coin-free-spin_GM406889139.pdfIn PDF document text
    • http://librarystkippgribl.com//repository/minecraft-bedrock-free-download_GM479516143.pdfIn PDF document text
    • http://librarystkippgribl.com/repository/free-robux-no-scam_GM431946152.pdfIn PDF document text
    • http://librarystkippgribl.com/repository/coin-master-reward-link-2021_GM406889139.pdfIn PDF document text
    • http://librarystkippgribl.com//repository/coin-master-free-500-spins-link_GM406889139.pdfIn PDF document text
    • http://librarystkippgribl.com//repository/send-me-500-2021-spins_GM406889139.pdfIn PDF document text
    • http://librarystkippgribl.com/repository/coin-master-hack-apk-35-8_GM406889139.pdfIn PDF document text
    • http://librarystkippgribl.com/repository/free-coin-master-coins-2021_GM406889139.pdfIn PDF document text
    • http://librarystkippgribl.com//repository/games-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://librarystkippgribl.com//repository/coin-master-free-spins-link-today-facebook_GM406889139.pdfIn PDF document text
    • http://librarystkippgribl.com//repository/how-to-get-free-spins-on-coin-master-game_GM406889139.pdfIn PDF document text
    • http://librarystkippgribl.com/repository/coin-master-links-2021_GM406889139.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_002_off00003020.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3020 23284 bytes
SHA-256: 2507e40c56e5cc07284472dfe8c0c6b8f3fcb9390efc68f2a4c42e0531451550
font_01_sfnt_off00006465.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6465 18484 bytes
SHA-256: f7b6576a3f9b0348374d3a5fd8e4bb71623a7ab150aa44cb754c73ac43401ac4

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