Malicious PDF — malware analysis report

Static analysis result for SHA-256 8033b8318dbf1b53…

MALICIOUS

PDF

40.4 KB Created: 2021-05-19 02:13:52 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 1655361b2863590d7544f41abb144a73 SHA-1: a13ff325f61b96fe35c4a9f9a66e591370519c92 SHA-256: 8033b8318dbf1b53ded2c369f7ce23e6728154c8043633bc66cf73bfd8293147
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to known malicious redirectors, masquerading as "free generator / game hack" lures. The primary redirector URL is https://netcdn.xyz/app/406889139/hack-coin-master-free-game-hack, which likely leads to further malicious content or downloads. The document body and embedded URLs reinforce this theme, aiming to trick users into clicking through to 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/hack-coin-master-free-game-hack In PDF document text
    • http://only1you.ru/images/free-coin-master-spins-2021_GM406889139.pdfIn PDF document text
    • http://only1you.ru/images/free-robux-gen_GM431946152.pdfIn PDF document text
    • http://only1you.ru/images/game-hack-coin-master_GM406889139.pdfIn PDF document text
    • http://only1you.ru/images/free-minecraft-education-edition_GM479516143.pdfIn PDF document text
    • http://only1you.ru/images/como-sacar-buen-puntaje-en-juego-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://only1you.ru/images/roblox-premium-free_GM431946152.pdfIn PDF document text
    • http://only1you.ru/images/coin-master-free-spins-no-survey_GM406889139.pdfIn PDF document text
    • http://only1you.ru/images/coin-master-daily-free-spins-blogspot_GM406889139.pdfIn PDF document text
    • http://only1you.ru/images/free-robux-no-verification-required_GM431946152.pdfIn PDF document text
    • http://only1you.ru/images/spin-coin-master-free_GM406889139.pdfIn PDF document text
    • http://only1you.ru/images/easy-robux-hack_GM431946152.pdfIn PDF document text
    • http://only1you.ru/images/free-robux-no-human-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • http://only1you.ru/images/coin-master-free-spins-link-2021-ios_GM406889139.pdfIn PDF document text
    • http://only1you.ru/images/oprewards-login_GM431946152.pdfIn PDF document text
    • http://only1you.ru/images/roblox36com-free-robux_GM431946152.pdfIn PDF document text
    • http://only1you.ru/images/coin-master-links-free-spins_GM406889139.pdfIn PDF document text
    • http://only1you.ru/images/coin-master-hack-2021-link_GM406889139.pdfIn PDF document text
    • http://only1you.ru/images/coin-master-hack-xyz_GM406889139.pdfIn PDF document text
    • http://only1you.ru/images/haktuts-coin-master-free-spin-link_GM406889139.pdfIn PDF document text
    • http://only1you.ru/images/coin-master-hack-spin-generator_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_off000045bc.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x45BC 23992 bytes
SHA-256: 2378e0135451688ccad34f1a55a627fa13f389f173e16e1180d223a10e02ebdc
font_01_sfnt_off00007cb0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7CB0 17880 bytes
SHA-256: 257aee740a5ae17e91b93ad4d540c168849f24efe28ef42b55966c96749a0114

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