Malicious PDF — malware analysis report

Static analysis result for SHA-256 55257a01974017dc…

MALICIOUS

PDF

42.6 KB Created: 2021-05-19 05:15:09 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 603f5b4f8a6ac06826bf806834e715f2 SHA-1: a55a2d2c58f7e91bc67f9bf4f1c9ce9689890469 SHA-256: 55257a01974017dc99f209c76361b493ef0fbc1b2b1958a0f4e4b47c82d37b65
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to malicious redirectors, disguised as game hacks and generators for popular games like Coin Master and Roblox. The primary lure URL is https://netcdn.xyz/app/406889139/coin-master-free-coins-and-spins-daily-summary-game-hack, which is flagged as a malicious redirector. The document body and embedded URLs suggest a social engineering tactic to trick users into visiting potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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/coin-master-free-coins-and-spins-daily-summary-game-hack In PDF document text
    • http://feuerwehr-rheinau.de/images/easy-ways-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://feuerwehr-rheinau.de/images/hack-roblox-players_GM431946152.pdfIn PDF document text
    • http://feuerwehr-rheinau.de/images/free-robux-pins_GM431946152.pdfIn PDF document text
    • http://feuerwehr-rheinau.de/images/roblox-but_GM431946152.pdfIn PDF document text
    • http://feuerwehr-rheinau.de/images/coin-master-hack-twitter_GM406889139.pdfIn PDF document text
    • http://feuerwehr-rheinau.de/images/hack-to-protect-village-on-coin-master_GM406889139.pdfIn PDF document text
    • http://feuerwehr-rheinau.de/images/free-robux-generator-2021-no-human-verification_GM431946152.pdfIn PDF document text
    • http://feuerwehr-rheinau.de/images/inappropriate-roblox-games_GM431946152.pdfIn PDF document text
    • http://feuerwehr-rheinau.de/images/minecraft-free-download-iphone_GM479516143.pdfIn PDF document text
    • http://feuerwehr-rheinau.de/images/minecraft-hacks-18-9_GM479516143.pdfIn PDF document text
    • http://feuerwehr-rheinau.de/images/earn-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://feuerwehr-rheinau.de/images/free-robux-with-no-survey_GM431946152.pdfIn PDF document text
    • http://feuerwehr-rheinau.de/images/coin-master-time-hack_GM406889139.pdfIn PDF document text
    • http://feuerwehr-rheinau.de/images/free-robux-for-free_GM431946152.pdfIn PDF document text
    • http://feuerwehr-rheinau.de/images/roblox-avatar-editor-free_GM431946152.pdfIn PDF document text
    • http://feuerwehr-rheinau.de/images/coin-master-free-rewards-link_GM406889139.pdfIn PDF document text
    • http://feuerwehr-rheinau.de/images/offers-to-complete-and-get-free-spins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://feuerwehr-rheinau.de/images/www-coinmaster-com_GM406889139.pdfIn PDF document text
    • http://feuerwehr-rheinau.de/images/coin-master-apk-hack-2021-ios_GM406889139.pdfIn PDF document text
    • http://feuerwehr-rheinau.de/images/easy-coin-master-hack-without-verification_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_off000049f2.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x49F2 24856 bytes
SHA-256: 09ca337073a053dc458e073e0aef22785ab35645bf2c894399cccc9bfc9f851d
font_01_sfnt_off00008257.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8257 18880 bytes
SHA-256: 80e94ef00212ac5fe4220c165773dd6e8ea516dcb328b8ee80116dae5b806def

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