Malicious PDF — malware analysis report

Static analysis result for SHA-256 b752371a6eef3fbe…

MALICIOUS

PDF

47.5 KB Created: 2021-06-03 10:01:59 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: a7a080cc8f1c69fff445d533ffb8ca24 SHA-1: 0a00232fa69d0eb85b5e76406113ef4e49fcff63 SHA-256: b752371a6eef3fbe4e91df98883227abe09dea20127937bf019228ba3acf4654
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains an embedded URI pointing to a suspicious domain, and a machine learning classifier flagged it as malicious. The document body, though heavily obfuscated, contains text related to game hacks and a URL that appears to be a lure for downloading content. The presence of an external URI and the ML classification strongly suggest a malicious intent to trick the user into visiting a harmful site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9769

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.online/app/479516143/is-minecraft-vr-free-game-hack In PDF document text
    • https://www.stomatoloska-ordinacija-rijeka.com/files/how-to-make-a-free-server-in-minecraft-java_GM479516143.pdfIn PDF document text
    • http://stomatoloska-ordinacija-rijeka.com/files/hack-coin-master-for-iphone_GM406889139.pdfIn PDF document text
    • http://stomatoloska-ordinacija-rijeka.com/files/coin-master-free-spins-link-download-apk_GM406889139.pdfIn PDF document text
    • http://stomatoloska-ordinacija-rijeka.com/files/coin-master-hack-apk-2021-ios_GM406889139.pdfIn PDF document text
    • http://stomatoloska-ordinacija-rijeka.com/files/daily-free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://stomatoloska-ordinacija-rijeka.com/files/robux-generator-no-verification-2021_GM431946152.pdfIn PDF document text
    • http://stomatoloska-ordinacija-rijeka.com/files/coin-master-online_GM406889139.pdfIn PDF document text
    • https://www.stomatoloska-ordinacija-rijeka.com/files/free-likes-for-tiktok_GM835599320.pdfIn PDF document text
    • http://stomatoloska-ordinacija-rijeka.com/files/free-tiktok-followers-app_GM835599320.pdfIn PDF document text
    • http://stomatoloska-ordinacija-rijeka.com/files/best-roblox-hacks_GM431946152.pdfIn PDF document text
    • https://www.stomatoloska-ordinacija-rijeka.com/files/free-mods-for-minecraft-pe_GM479516143.pdfIn PDF document text
    • https://www.stomatoloska-ordinacija-rijeka.com/files/what-tiktok-free-followers_GM835599320.pdfIn PDF document text
    • http://stomatoloska-ordinacija-rijeka.com/files/roblox-free-robux-com_GM431946152.pdfIn PDF document text
    • http://stomatoloska-ordinacija-rijeka.com/files/how-to-get-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • https://www.stomatoloska-ordinacija-rijeka.com/files/hack-pokemon-go-free_GM1094591345.pdfIn PDF document text
    • http://stomatoloska-ordinacija-rijeka.com/files/how-to-get-free-robux-promo-codes_GM431946152.pdfIn PDF document text
    • http://stomatoloska-ordinacija-rijeka.com/files/free-robux-with-no-verification-2021_GM431946152.pdfIn PDF document text
    • https://www.stomatoloska-ordinacija-rijeka.com/files/hack-coin-master-online_GM406889139.pdfIn PDF document text
    • http://stomatoloska-ordinacija-rijeka.com/files/coin-master-hack-spins-and-coins-unlimited-free_GM406889139.pdfIn PDF document text
    • https://www.stomatoloska-ordinacija-rijeka.com/files/free-minecraft-java-account_GM479516143.pdfIn PDF document text
    • https://freegiftcodes.euIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off000055cf.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x55CF 25108 bytes
SHA-256: 534718cbfce979ab53933ba762b4574ee5fa088f2a3f20f0995b3bc874c92765
font_01_sfnt_off00008ec8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8EC8 2880 bytes
SHA-256: 8d09faa7bffaaff86a3199446ae26177c0ae582386a893a6614a14e4b38efd9d
font_02_sfnt_off000098b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x98B5 17704 bytes
SHA-256: 8bb0636472a21c77c03eb179316ec7672ebaf2fffc2d381e43d3ff9b7c84c5d1

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