Malicious PDF — malware analysis report

Static analysis result for SHA-256 50dbb3744bf9b9c2…

MALICIOUS

PDF

44.8 KB Created: 2021-05-19 02:30:22 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 68f09086b55a7f2df59f7679b1076106 SHA-1: a5b0191d91be1d45e95309ab5a53def9583edf87 SHA-256: 50dbb3744bf9b9c238652f08d0766e60582a1f7124005f9569a825e11c6df6da
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links, including one to a known malicious redirector infrastructure, which is designed to lure users into clicking on game hack generators. The document body, though partially corrupted, contains references to 'Coin Master' and a URL matching the malicious redirector. The presence of embedded URLs and the specific heuristic firings strongly indicate a phishing or scam attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9632

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-free-spins-link-game-hack In PDF document text
    • http://balkanin.com/images/free-multiplayer-minecraft-server_GM479516143.pdfIn PDF document text
    • http://balkanin.com/images/coin-master-reward-link_GM406889139.pdfIn PDF document text
    • http://balkanin.com/images/coin-master-fan-page-facebook_GM406889139.pdfIn PDF document text
    • http://balkanin.com/images/coin-master-online_GM406889139.pdfIn PDF document text
    • http://balkanin.com/images/all-free-items-in-roblox_GM431946152.pdfIn PDF document text
    • http://balkanin.com/images/how-to-get-free-shields-on-coin-master_GM406889139.pdfIn PDF document text
    • http://balkanin.com/images/coin-master-free-spin-realme-products_GM406889139.pdfIn PDF document text
    • http://balkanin.com/images/coin-master-hack-lost-world-2021_GM406889139.pdfIn PDF document text
    • http://balkanin.com/images/roblox-e-free_GM431946152.pdfIn PDF document text
    • http://balkanin.com/images/free-roblox-wings_GM431946152.pdfIn PDF document text
    • http://balkanin.com/images/coinmaster-spin-ml-free_GM406889139.pdfIn PDF document text
    • http://balkanin.com/images/free-robux-only-username_GM431946152.pdfIn PDF document text
    • http://balkanin.com/images/roblox-army-free-robux_GM431946152.pdfIn PDF document text
    • http://balkanin.com/images/minecraft-pe-server-hosting-free_GM479516143.pdfIn PDF document text
    • http://balkanin.com/images/how-to-free-robux_GM431946152.pdfIn PDF document text
    • http://balkanin.com/images/free-coin-master-spins-blog_GM406889139.pdfIn PDF document text
    • http://balkanin.com/images/coin-master-free-spin-and-coin-link-haktuts-hacking-news_GM406889139.pdfIn PDF document text
    • http://balkanin.com/images/wizard-hacks_GM479516143.pdfIn PDF document text
    • http://balkanin.com/images/orewards-com-free-robux_GM431946152.pdfIn PDF document text
    • http://balkanin.com/images/get-free-roblox_GM431946152.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004835.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4835 26248 bytes
SHA-256: 811cb9da779a0cb841fcb8f56f0f98106f295a98be05e4692f360ae75a69512b
font_01_sfnt_off00008341.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8341 2880 bytes
SHA-256: 10d025f04f706eb71cdda4f99784df1b9ccb52e48080e43095e0398eaef6f132
font_02_sfnt_off00008d2b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8D2B 18056 bytes
SHA-256: a4f33549350803e8a819cbfad6b4ff3cdc0b302ceab74af9f2f663eab6bd9ec0

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