Malicious PDF — malware analysis report

Static analysis result for SHA-256 6b5ad80a5203004a…

MALICIOUS

PDF

41.7 KB Created: 2021-05-12 16:10:12 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: c8e797544dcbfdaf689d30b15ccf59fb SHA-1: 1063c2a7e2246d211dbc238f098bc7a41c7078af SHA-256: 6b5ad80a5203004ae4142c06b8d07883fa48791d49f8819e6ee5e0f6e53cd613
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links that redirect to malicious infrastructure, specifically advertising 'free generator / game hack' content. The presence of a visual download button lure and the ML classifier's high confidence score indicate a malicious intent to trick users into visiting potentially harmful sites. No scripts were extracted, but the document's structure and embedded URLs strongly suggest a phishing or scam attempt.

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-coins-and-spins-game-hack In PDF document text
    • http://balkanin.com/images/how-to-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://balkanin.com/images/levvvel-coin-master_GM406889139.pdfIn PDF document text
    • http://balkanin.com/images/coin-master-hack-2021-app-download_GM406889139.pdfIn PDF document text
    • http://balkanin.com/images/doctor-louie-roblox_GM431946152.pdfIn PDF document text
    • http://balkanin.com/images/coin-master-free-daily-spins_GM406889139.pdfIn PDF document text
    • http://balkanin.com/images/500-free-coin-master-spins_GM406889139.pdfIn PDF document text
    • http://balkanin.com/images/como-hack-coin-master_GM406889139.pdfIn PDF document text
    • http://balkanin.com/images/daily-free-spin-coin-master-link_GM406889139.pdfIn PDF document text
    • http://balkanin.com/images/how-to-get-minecraft-for-free-on-iphone-2021_GM479516143.pdfIn PDF document text
    • http://balkanin.com/images/free-robux-games-that-actually-work_GM431946152.pdfIn PDF document text
    • http://balkanin.com/images/minecraft-hacks-for-2b2t_GM479516143.pdfIn PDF document text
    • http://balkanin.com/images/free-account-roblox-with-robux_GM431946152.pdfIn PDF document text
    • http://balkanin.com/images/free-roblox-accounts-2021-with-robux_GM431946152.pdfIn PDF document text
    • http://balkanin.com/images/free-robux-for-kids_GM431946152.pdfIn PDF document text
    • http://balkanin.com/images/coin-master-links-for-free-spins_GM406889139.pdfIn PDF document text
    • http://balkanin.com/images/robuxmatchcom-free-robux_GM431946152.pdfIn PDF document text
    • http://balkanin.com/images/games-like-coin-master_GM406889139.pdfIn PDF document text
    • http://balkanin.com/images/coin-master-free-spin-and-coin_GM406889139.pdfIn PDF document text
    • http://balkanin.com/images/get-me-free-robux_GM431946152.pdfIn PDF document text
    • http://balkanin.com/images/coin-master-village-cost_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_off00004a3e.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4A3E 24616 bytes
SHA-256: 3e7d12ac7efb2d1e8306740a74ccf7592cc6f4ac533320a384ac847b7e29f112
font_01_sfnt_off0000827a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x827A 17728 bytes
SHA-256: e3d0b8926ee7e267670c6470891f76c6f1adfe71673e36adb63f096bfed3a95a

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