Malicious PDF — malware analysis report

Static analysis result for SHA-256 1165c917365fee4b…

MALICIOUS

PDF

41.7 KB Created: 2021-05-10 23:31:44 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: a99fac7a787f42d8da24589d632764fc SHA-1: 7c187fa04df042472e43258cf92028a33e71ada0 SHA-256: 1165c917365fee4bdc246f8a7c36cafb79229429eb1b1d9b54e8e72e8fc34afd
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirectors and infrastructure, disguised as 'free generator' or 'game hack' lures. The document body, though heavily obfuscated, contains references to these lures and the primary malicious URL. The presence of multiple redirector links and the ML classifier strongly indicate malicious intent, likely to lead users to further malicious sites or downloads.

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/free-400-spins-coin-master-game-hack In PDF document text
    • http://sd-olimp.hr/files/free-robux-mod_GM431946152.pdfIn PDF document text
    • https://www.sd-olimp.hr/files/roblox-com-www_GM431946152.pdfIn PDF document text
    • https://www.sd-olimp.hr/files/free-robux-without-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://sd-olimp.hr/files/how-to-win-free-robux_GM431946152.pdfIn PDF document text
    • https://www.sd-olimp.hr/files/coin-master-hack-version-apk-download_GM406889139.pdfIn PDF document text
    • https://www.sd-olimp.hr/files/free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://www.sd-olimp.hr/files/www-claim-gg-to-earn-free-robux_GM431946152.pdfIn PDF document text
    • https://www.sd-olimp.hr/files/coin-master-hack-spin-link_GM406889139.pdfIn PDF document text
    • http://sd-olimp.hr/files/free-roblox-accounts-dantdm_GM431946152.pdfIn PDF document text
    • https://www.sd-olimp.hr/files/coin-game_GM406889139.pdfIn PDF document text
    • https://www.sd-olimp.hr/files/coin-master-free-spins-and-coins-2021_GM406889139.pdfIn PDF document text
    • http://sd-olimp.hr/files/minecraft-windows-10-edition-hacks_GM479516143.pdfIn PDF document text
    • http://sd-olimp.hr/files/minecraft-free-android_GM479516143.pdfIn PDF document text
    • https://www.sd-olimp.hr/files/coin-master-free-spins-link-download-for-iphone_GM406889139.pdfIn PDF document text
    • http://sd-olimp.hr/files/coin-master-35-16-hack-apk_GM406889139.pdfIn PDF document text
    • https://www.sd-olimp.hr/files/how-to-buy-robux-for-free_GM431946152.pdfIn PDF document text
    • http://sd-olimp.hr/files/unlimited-robux_GM431946152.pdfIn PDF document text
    • https://www.sd-olimp.hr/files/free-spins-from-coin-master_GM406889139.pdfIn PDF document text
    • http://sd-olimp.hr/files/free-robux-link_GM431946152.pdfIn PDF document text
    • https://www.sd-olimp.hr/files/how-to-get-roblox-premium-for-free_GM431946152.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_off0000497c.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x497C 24316 bytes
SHA-256: d9c607344aca87a8505ee4f56070ee60e4c63f3cacb055d0205ede100aeb077b
font_01_sfnt_off00008129.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8129 18120 bytes
SHA-256: 83d73b5d15900ebf4c8e8e4c37772eeea58eeced4667d8a4ec0d9f93b93c7b15

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