Malicious PDF — malware analysis report

Static analysis result for SHA-256 171c78cdad0fbdd4…

MALICIOUS

PDF

42.7 KB Created: 2021-05-12 16:30:38 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: e8dfddad68c1643e195ca2550d08cc1e SHA-1: e35d9ca5d95c2379ae197fe7c35bf34814aa22d8 SHA-256: 171c78cdad0fbdd401e4fcd50397770055220b8dda4e446dbe4953c6c8788fb0
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links that redirect to malicious infrastructure, specifically promoting "game hacks" and "generators". The ML classifier strongly flagged this PDF as malicious, and heuristics indicate it uses a download button lure. While no scripts were directly extracted, the PDF structure and embedded URLs suggest it's designed to trick users into visiting malicious sites that likely host further malware or phishing content.

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-hack-tool-game-hack In PDF document text
    • http://sd-olimp.hr/files/free-robux-redeem-codes_GM431946152.pdfIn PDF document text
    • http://sd-olimp.hr/files/minecraft-free-minecoins_GM479516143.pdfIn PDF document text
    • http://sd-olimp.hr/files/get-free-coin-master-coins_GM406889139.pdfIn PDF document text
    • https://www.sd-olimp.hr/files/free-robux-without-human-verification-2021_GM431946152.pdfIn PDF document text
    • https://www.sd-olimp.hr/files/how-to-hack-roblox-2021_GM431946152.pdfIn PDF document text
    • http://sd-olimp.hr/files/free-minecraft-skins-pc_GM479516143.pdfIn PDF document text
    • https://www.sd-olimp.hr/files/free-coins-on-coin-master-generator_GM406889139.pdfIn PDF document text
    • https://www.sd-olimp.hr/files/is-minecraft-java-edition-free_GM479516143.pdfIn PDF document text
    • https://www.sd-olimp.hr/files/coin-master-free-spins-hack-no-human-verification_GM406889139.pdfIn PDF document text
    • https://www.sd-olimp.hr/files/free-coins-app-for-coin-master_GM406889139.pdfIn PDF document text
    • http://sd-olimp.hr/files/roblox-generator-no-verification_GM431946152.pdfIn PDF document text
    • http://sd-olimp.hr/files/extra-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://sd-olimp.hr/files/free-robux-hack_GM431946152.pdfIn PDF document text
    • http://sd-olimp.hr/files/how-to-hack-coin-master-in-pc_GM406889139.pdfIn PDF document text
    • https://www.sd-olimp.hr/files/free-coins-coin-master-iphone_GM406889139.pdfIn PDF document text
    • http://sd-olimp.hr/files/free-robux-generator-for-roblox-2021_GM431946152.pdfIn PDF document text
    • https://www.sd-olimp.hr/files/how-to-hack-roblox-accounts-2021_GM431946152.pdfIn PDF document text
    • http://sd-olimp.hr/files/coin-master-free-spins-and-coins-link-haktuts_GM406889139.pdfIn PDF document text
    • https://www.sd-olimp.hr/files/free-daily-spins-from-coin-master_GM406889139.pdfIn PDF document text
    • http://sd-olimp.hr/files/how-to-get-free-coins-on-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004b60.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4B60 25456 bytes
SHA-256: c1c51cfad650a93e77d0898046ec0cb1d0060e9e98c743ec99356ced364a120a
font_01_sfnt_off00008621.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8621 17788 bytes
SHA-256: 725f3a651c33746df0014e6780b1d3159026b5a69206e8cf9b341b7dfc4b37ba

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