Malicious PDF — malware analysis report

Static analysis result for SHA-256 7d7cd93e4402c95b…

MALICIOUS

PDF

48.3 KB Created: 2021-06-13 19:56:47 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: e45a6373652bddf914cc4d812f11fec5 SHA-1: 7a1b165a2d49ef1ed43d6ce55a1bd32a1b28f886 SHA-256: 7d7cd93e4402c95b241f88b8a105026ab20ee7b6af20f2b3aefe98103658d70e
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to redirectors and scam pages related to game hacks and free currency, as indicated by the 'PDF_GAME_HACK_REDIRECT_LURE' and 'PDF_MALICIOUS_REDIRECTOR_LINK' heuristics. The document body, though heavily obfuscated, contains references to these lures. The presence of embedded URLs and the ML classifier's high confidence score suggest a malicious intent to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9013

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.co/app/431946152/what-am-i-drawing-roblox-cheat-game-hack In PDF document text
    • http://cruzdelsur.ru/images/free-robux-no-verification-2021-ios_GM431946152.pdfIn PDF document text
    • http://cruzdelsur.ru/images/free-robux-no-verification-no-survey_GM431946152.pdfIn PDF document text
    • http://cruzdelsur.ru/images/coin-master-free-link_GM406889139.pdfIn PDF document text
    • http://cruzdelsur.ru/images/free-minecraft-server-hosting_GM479516143.pdfIn PDF document text
    • http://cruzdelsur.ru/images/claimrobux-net_GM431946152.pdfIn PDF document text
    • http://cruzdelsur.ru/images/roblox-promo-code-hack-robux_GM431946152.pdfIn PDF document text
    • http://cruzdelsur.ru/images/roblox-phantom-forces-hack_GM431946152.pdfIn PDF document text
    • http://cruzdelsur.ru/images/how-to-buy-robux-for-free_GM431946152.pdfIn PDF document text
    • http://cruzdelsur.ru/images/how-to-get-java-minecraft-free_GM479516143.pdfIn PDF document text
    • http://cruzdelsur.ru/images/get-free-robux-com_GM431946152.pdfIn PDF document text
    • http://cruzdelsur.ru/images/free-robux-codes-generator_GM431946152.pdfIn PDF document text
    • http://cruzdelsur.ru/images/hack-roblox-with-this-edit-cookie_GM431946152.pdfIn PDF document text
    • http://cruzdelsur.ru/images/how-to-get-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://cruzdelsur.ru/images/free-robux-gift-card_GM431946152.pdfIn PDF document text
    • http://cruzdelsur.ru/images/how-to-hack-a-minecraft-server-and-make-yourself-op_GM479516143.pdfIn PDF document text
    • http://cruzdelsur.ru/images/how-to-get-minecraft-for-free-on-tablet_GM479516143.pdfIn PDF document text
    • http://cruzdelsur.ru/images/free-robux-no-verification-or-survey_GM431946152.pdfIn PDF document text
    • http://cruzdelsur.ru/images/free-promo-codes-for-coin-master_GM406889139.pdfIn PDF document text
    • http://cruzdelsur.ru/images/free-coin-and-spin-for-coin-master_GM406889139.pdfIn PDF document text
    • http://cruzdelsur.ru/images/free-roblox-gift-card-codes-2021-unused_GM431946152.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_003_off0000483e.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x483E 28460 bytes
SHA-256: 5893193fe5774a5e4b69b7f917944dfe6110e831cf60a80a50acecdd2c2b11d1
font_01_sfnt_off000089d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x89D9 5696 bytes
SHA-256: 450e3ee45915afe13702bf1d587eb8b9ad88a8d2113419ac9f2fd116a828e139
font_02_sfnt_off000096eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x96EB 19480 bytes
SHA-256: 98dc79c541f1de8ef8fef78b6ff75dbcf46cb6ce3db9015f7a0c2eeee515fa98

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