Malicious PDF — malware analysis report

Static analysis result for SHA-256 8f71e5c2eaad7dee…

MALICIOUS

PDF

47.2 KB Created: 2021-06-03 09:04:22 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 318b48dbc3722122737fedfc8d2fb1c7 SHA-1: a808671ed5737cdbf0373b5961f681de91043722 SHA-256: 8f71e5c2eaad7dee50caf2715a2a138a1cf8b4d7f12d412067d71603e05169f9
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 infrastructure, disguised as game hacks and free generators. The primary lure is a link to 'coin-master-gold-cards-hack-game-hack', which is part of a known malicious redirector chain. While no scripts were explicitly extracted, the PDF structure and embedded links suggest an attempt to exploit vulnerabilities or trick the user into downloading a secondary payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9769

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/406889139/coin-master-gold-cards-hack-game-hack In PDF document text
    • http://librarystkippgribl.com/repository/minecraft-xray-hack_GM479516143.pdfIn PDF document text
    • http://librarystkippgribl.com//repository/coin-master-hack-version-2021_GM406889139.pdfIn PDF document text
    • http://librarystkippgribl.com//repository/coin-master-free-spins-only_GM406889139.pdfIn PDF document text
    • http://librarystkippgribl.com//repository/free-robux-no-human-verification-or-survey-or-download_GM431946152.pdfIn PDF document text
    • http://librarystkippgribl.com/repository/coin-master-hack-apk-2021_GM406889139.pdfIn PDF document text
    • http://librarystkippgribl.com/repository/daily-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://librarystkippgribl.com//repository/roblox-person_GM431946152.pdfIn PDF document text
    • http://librarystkippgribl.com//repository/how-to-make-a-minecraft-server-for-free-java_GM479516143.pdfIn PDF document text
    • http://librarystkippgribl.com/repository/if-you-delete-minecraft-can-you-redownload-it-for-free_GM479516143.pdfIn PDF document text
    • http://librarystkippgribl.com/repository/play-minecraft-for-free-on-pc_GM479516143.pdfIn PDF document text
    • http://librarystkippgribl.com//repository/free-minecraft-severs_GM479516143.pdfIn PDF document text
    • http://librarystkippgribl.com/repository/free-spins-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://librarystkippgribl.com//repository/coin-master-hack-software_GM406889139.pdfIn PDF document text
    • http://librarystkippgribl.com/repository/rbx-land-free-robux_GM431946152.pdfIn PDF document text
    • http://librarystkippgribl.com//repository/best-free-spins-link-coin-master_GM406889139.pdfIn PDF document text
    • http://librarystkippgribl.com//repository/free-spins-on-coin-master-generator_GM406889139.pdfIn PDF document text
    • http://librarystkippgribl.com//repository/coin-master-free-spins-haktuts_GM406889139.pdfIn PDF document text
    • http://librarystkippgribl.com/repository/free-robux-earn_GM431946152.pdfIn PDF document text
    • http://librarystkippgribl.com//repository/how-to-use-redstone_GM479516143.pdfIn PDF document text
    • http://librarystkippgribl.com//repository/best-free-hacked-client_GM479516143.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off000052b6.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x52B6 25500 bytes
SHA-256: 61faac33cee31c30ff1bc101b5e5bf71d9a871ac6e3138dc23dc3b1a1c017096
font_01_sfnt_off00008c96.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8C96 2880 bytes
SHA-256: b053084cafd01c649462d87667ba56c569d6480ce60e7d20ae57ef6124cf178e
font_02_sfnt_off00009680.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9680 17964 bytes
SHA-256: adb4edbf0c57abdeeb225f0bd422abdfe2e9b1ff4eb8b752c2c204cd3e2141b0

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