Malicious PDF — malware analysis report

Static analysis result for SHA-256 4327e77e6e9ca1f2…

MALICIOUS

PDF

47.1 KB Created: 2021-05-10 18:14:53 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 99ff63ce3189d3799950fefe4d63b412 SHA-1: 82b7e34cfa69cf29ab3123c2170fbda70af2fb23 SHA-256: 4327e77e6e9ca1f262c7baf55a78b9e1ba1f1197d53b38fb71d4f13fd4addab5
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirectors and lures users with promises of game hacks and free currency. The primary malicious URL identified is https://netcdn.xyz/app/406889139/coin-master-free-spins-link-hack-game-hack. While no scripts were explicitly extracted, the PDF structure and embedded links strongly suggest a social engineering attack aimed at driving traffic to malicious sites, likely as an initial access vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9044

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-hack-game-hack In PDF document text
    • http://schoolsupportandbeyond.org/images/real-free-robux-codes_GM431946152.pdfIn PDF document text
    • http://schoolsupportandbeyond.org/images/how-to-get-hacks-on-roblox_GM431946152.pdfIn PDF document text
    • http://schoolsupportandbeyond.org/images/free-spins-on-coin-master-links-2021_GM406889139.pdfIn PDF document text
    • http://schoolsupportandbeyond.org/images/roblox-gift-card-online-free_GM431946152.pdfIn PDF document text
    • http://schoolsupportandbeyond.org/images/free-robux-only-username_GM431946152.pdfIn PDF document text
    • http://schoolsupportandbeyond.org/images/free-robux-hack_GM431946152.pdfIn PDF document text
    • http://schoolsupportandbeyond.org/images/free-minecraft-skins-pc_GM479516143.pdfIn PDF document text
    • http://schoolsupportandbeyond.org/images/free-robux-generator-2021_GM431946152.pdfIn PDF document text
    • http://schoolsupportandbeyond.org/images/how-can-you-get-free-robux_GM431946152.pdfIn PDF document text
    • http://schoolsupportandbeyond.org/images/minecraft-114-download_GM479516143.pdfIn PDF document text
    • http://schoolsupportandbeyond.org/images/coin-master-hack-mod-apk-35-8_GM406889139.pdfIn PDF document text
    • http://schoolsupportandbeyond.org/images/free-robux-com-2021_GM431946152.pdfIn PDF document text
    • http://schoolsupportandbeyond.org/images/client-minecraft_GM479516143.pdfIn PDF document text
    • http://schoolsupportandbeyond.org/images/coin-master-connection-lost_GM406889139.pdfIn PDF document text
    • http://schoolsupportandbeyond.org/images/300-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://schoolsupportandbeyond.org/images/coin-master-hack-ios-2021_GM406889139.pdfIn PDF document text
    • http://schoolsupportandbeyond.org/images/earn-robux-websites_GM431946152.pdfIn 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_003_off0000473d.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x473D 31748 bytes
SHA-256: 48c2a51ad88f149a65d7a855a29ee61b51e490176b27a9697cbb78b786e4c0ec
font_01_sfnt_off00008cdf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8CDF 2880 bytes
SHA-256: 10d025f04f706eb71cdda4f99784df1b9ccb52e48080e43095e0398eaef6f132
font_02_sfnt_off000096ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x96CA 18056 bytes
SHA-256: 654168d3b6bcb61be570e1238605831ee66fed80d87ac67967dd188319cba9ee

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