Malicious PDF — malware analysis report

Static analysis result for SHA-256 d772c82b9fd5e421…

MALICIOUS

PDF

34.9 KB Created: 2021-07-04 07:46:31 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: f7987d3c45a5f5869e45b6b76c6f6cfe SHA-1: 91104f9e6d5ef68f90827d50ecf7ad3dc016596e SHA-256: d772c82b9fd5e4215e2bc40af94dc486a6d385aa37f90a484513fa42e5c48cf6
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to redirector domains that promise free in-game currency and cheats, such as 'game-hunters-coin-master-game-hack'. These links are indicative of a phishing or scam campaign designed to lure users to malicious websites. The ML classifier also strongly flagged this PDF as malicious, supporting the assessment of a malicious redirector lure.

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/game-hunters-coin-master-game-hack In PDF document text
    • http://www.pspmrsmkkb.com/webopac/repository/get-free-robux-without-doing-anything_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmkkb.com/webopac/repository/100-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://www.pspmrsmkkb.com/webopac/repository/coin-master-hack-2021-without-human-verification_GM406889139.pdfIn PDF document text
    • http://www.pspmrsmkkb.com/webopac/repository/cheat-roblox-skin_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmkkb.com/webopac/repository/free-premium-roblox_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmkkb.com/webopac/repository/como-conseguir-robux-gratis-sin-hacks-2021_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmkkb.com/webopac/repository/minecraft-life-hacks_GM479516143.pdfIn PDF document text
    • http://www.pspmrsmkkb.com/webopac/repository/roblox-card-code-hack_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmkkb.com/webopac/repository/how-to-get-robux-easy_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmkkb.com/webopac/repository/free-robux-no-verification-2021-android_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmkkb.com/webopac/repository/claim-free-robux_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmkkb.com/webopac/repository/how-to-get-free-coins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://www.pspmrsmkkb.com/webopac/repository/how-to-get-free-stuff-on-roblox-xbox-one_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmkkb.com/webopac/repository/roblox-robux-hack-page_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmkkb.com/webopac/repository/coin-master-free-spins-link-no-verification_GM406889139.pdfIn PDF document text
    • http://www.pspmrsmkkb.com/webopac/repository/free-robux-for-kids_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmkkb.com/webopac/repository/coin-master-hack-2021-app_GM406889139.pdfIn PDF document text
    • http://www.pspmrsmkkb.com/webopac/repository/free-coin-and-spin-for-coin-master_GM406889139.pdfIn PDF document text
    • http://www.pspmrsmkkb.com/webopac/repository/roblox-vehicle-simulator-hack-script-pastebin_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmkkb.com/webopac/repository/coin-master-card-collection-hack-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
font_00_sfnt_off000031f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x31F4 23232 bytes
SHA-256: 6e4bc6c16495cb7b195c072dd35efaa7527840bddc02e6f160fb93b98b58b3c3
font_01_sfnt_off000065ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x65EE 18236 bytes
SHA-256: 1c9276275f01b8ee8a35d94754bfc2cd49d6bf50d60c60048a77e6e66c35f9e8

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