Malicious PDF — malware analysis report

Static analysis result for SHA-256 2cb57e6c75ee0d6f…

MALICIOUS

PDF

42.8 KB Created: 2021-05-16 10:44:10 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: dcdfd8b30549aa3634a548cc9411e683 SHA-1: d8486c9783acddf9d7040400cb7b2763ac42e7fd SHA-256: 2cb57e6c75ee0d6fa6da8fdcc0d7759ec74cf14bcb5e3320654d076dbf61deae
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links pointing to known malicious redirectors and lures related to game hacks and free currency. The heuristic firings indicate that these links are intentionally malicious and designed to redirect users to potentially harmful content. While no scripts were explicitly extracted, the PDF structure itself contains embedded URLs that are part of the malicious lure.

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/431946152/game-give-free-robux-game-hack In PDF document text
    • http://cruzdelsur.ru/images/coin-master-hack-spins_GM406889139.pdfIn PDF document text
    • http://cruzdelsur.ru/images/www-robux-redeem_GM431946152.pdfIn PDF document text
    • http://cruzdelsur.ru/images/how-to-get-1-million-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • http://cruzdelsur.ru/images/free-robux-no-verification-no-download-2021_GM431946152.pdfIn PDF document text
    • http://cruzdelsur.ru/images/apps-to-get-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://cruzdelsur.ru/images/www-cheatsk-com-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://cruzdelsur.ru/images/hacker-minecraft-song_GM479516143.pdfIn PDF document text
    • http://cruzdelsur.ru/images/how-to-get-free-robux-for-free_GM431946152.pdfIn PDF document text
    • http://cruzdelsur.ru/images/how-to-get-free-roblox-gift-cards_GM431946152.pdfIn PDF document text
    • http://cruzdelsur.ru/images/coin-master-free-spins-daily-fb-champion_GM406889139.pdfIn PDF document text
    • http://cruzdelsur.ru/images/easy-how-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://cruzdelsur.ru/images/roblox-com-free-robux_GM431946152.pdfIn PDF document text
    • http://cruzdelsur.ru/images/coin-master-coins-free_GM406889139.pdfIn PDF document text
    • http://cruzdelsur.ru/images/get-robux_GM431946152.pdfIn PDF document text
    • http://cruzdelsur.ru/images/free-spins-and-coins-coin-master-2021-link_GM406889139.pdfIn PDF document text
    • http://cruzdelsur.ru/images/how-to-get-free-daily-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://cruzdelsur.ru/images/free-robux-by-watching-ads_GM431946152.pdfIn PDF document text
    • http://cruzdelsur.ru/images/coin-master-codes_GM406889139.pdfIn PDF document text
    • http://cruzdelsur.ru/images/free-robux-generator-2021-no-human-verification_GM431946152.pdfIn PDF document text
    • http://cruzdelsur.ru/images/how-to-hack-coin-master-cheat-engine_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_off000049f3.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x49F3 25500 bytes
SHA-256: 93a31d3c6ec455283a849fe068c4b8d83b0f2784de442e17c3558f31ed1a9381
font_01_sfnt_off0000837b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x837B 18736 bytes
SHA-256: 457049c0c0b067ea8a2ccaf5c24f39a354f8c872058b648fa686429afe9091ea

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