Malicious PDF — malware analysis report

Static analysis result for SHA-256 57b104fe5880be56…

MALICIOUS

PDF

44.4 KB Created: 2021-05-17 16:32:05 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 5d61fb2a5bfcd4aea4bf36bd00fd33ac SHA-1: a6a72c961102b5ecd06dcea6dddd71969485dacc SHA-256: 57b104fe5880be56d05c4e7ca7202c5e1713de6b1892a9c5ab6bb7502365b486
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links designed to lure users into clicking on them by promising free game currency and hacks. The primary link redirects to known malicious infrastructure, indicating a phishing or scam attempt. Although no scripts were explicitly extracted, the PDF structure and embedded URLs strongly suggest a malicious intent to redirect users to potentially harmful sites.

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 https://netcdn.xyz/app/406889139/free-coin-master-spins-and-coins-game-hack In PDF document text
    • http://clinicadentalvilaplana.es/images/cm-spin-link_GM406889139.pdfIn PDF document text
    • http://clinicadentalvilaplana.es/images/how-many-villages-are-in-coin-master_GM406889139.pdfIn PDF document text
    • http://clinicadentalvilaplana.es/images/coin-master-heaven-free-spins_GM406889139.pdfIn PDF document text
    • http://clinicadentalvilaplana.es/images/where-can-i-get-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://clinicadentalvilaplana.es/images/coinmaster-rewards_GM406889139.pdfIn PDF document text
    • http://clinicadentalvilaplana.es/images/how-to-hack-any-roblox-account_GM431946152.pdfIn PDF document text
    • http://clinicadentalvilaplana.es/images/coin-master-free-spins-and-free-coins_GM406889139.pdfIn PDF document text
    • http://clinicadentalvilaplana.es/images/coin-master-shield-hack_GM406889139.pdfIn PDF document text
    • http://clinicadentalvilaplana.es/images/hacked-roblox-accounts-list_GM431946152.pdfIn PDF document text
    • http://clinicadentalvilaplana.es/images/coin-master-free-spins-link-2021-haktuts_GM406889139.pdfIn PDF document text
    • http://clinicadentalvilaplana.es/images/free-spins-coin-master-no-verification_GM406889139.pdfIn PDF document text
    • http://clinicadentalvilaplana.es/images/coin-master-daily-free-spins-link-march-2021_GM406889139.pdfIn PDF document text
    • http://clinicadentalvilaplana.es/images/minecraft-education-edition-free_GM479516143.pdfIn PDF document text
    • http://clinicadentalvilaplana.es/images/microsoft-bing-robux_GM431946152.pdfIn PDF document text
    • http://clinicadentalvilaplana.es/images/minecraft-free-edition_GM479516143.pdfIn PDF document text
    • http://clinicadentalvilaplana.es/images/free-spins-coin-master-links-app_GM406889139.pdfIn PDF document text
    • http://clinicadentalvilaplana.es/images/minecraft-anarchy-server-no-hacks_GM479516143.pdfIn PDF document text
    • http://clinicadentalvilaplana.es/images/free-robux-link_GM431946152.pdfIn PDF document text
    • http://clinicadentalvilaplana.es/images/roblox-demon_GM431946152.pdfIn PDF document text
    • http://clinicadentalvilaplana.es/images/how-to-get-free-spins-and-coins-in-coin-master_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_003_off00004f20.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4F20 29012 bytes
SHA-256: 018ad2c9fb57e61a7af4b4d898299817b55f33f76ce714817d034817b9f261f6
font_01_sfnt_off00008bde.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8BDE 18060 bytes
SHA-256: 55f53c4f18bfaf59a8fbb6d381f980c96a3f4ad908aa3278e43a985984e68094

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