Malicious PDF — malware analysis report

Static analysis result for SHA-256 5d19f0b056922265…

MALICIOUS

PDF

49.8 KB Created: 2021-05-14 20:36:42 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 44511bf14eeb31a62d92edc6e3b74bb2 SHA-1: f83a18ee0550872517ec57d6d305d084831c60e5 SHA-256: 5d19f0b056922265ba260e9c23f46c98a655091cb2cf5501c198b078e77408f4
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document employs a common lure of 'free generators' and 'game hacks' to trick users into clicking malicious links. The document contains multiple embedded URLs that redirect to potentially harmful content, including a known malicious redirector. The ML classifier also flagged this PDF as malicious, supporting the conclusion that it is designed to lead users to malicious websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8642

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-cards-and-spin-link-game-hack In PDF document text
    • http://e-mailservis.cz/images/coin-master-hack-pc-cheat-engine_GM406889139.pdfIn PDF document text
    • http://e-mailservis.cz/images/coin-master-daily-free-link_GM406889139.pdfIn PDF document text
    • http://e-mailservis.cz/images/what-games-on-roblox-give-you-free-robux_GM431946152.pdfIn PDF document text
    • http://e-mailservis.cz/images/minecraft-java-edition-code-free_GM479516143.pdfIn PDF document text
    • http://e-mailservis.cz/images/minecraft-survival-free_GM479516143.pdfIn PDF document text
    • http://e-mailservis.cz/images/coin-master-free-coins-and-spins-hack_GM406889139.pdfIn PDF document text
    • http://e-mailservis.cz/images/free-spins-coin-master-links-2021_GM406889139.pdfIn PDF document text
    • http://e-mailservis.cz/images/hack-coin-master-dzooka_GM406889139.pdfIn PDF document text
    • http://e-mailservis.cz/images/coin-master-hack-version-2021-free-download_GM406889139.pdfIn PDF document text
    • http://e-mailservis.cz/images/free-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://e-mailservis.cz/images/coin-master-hack-2021-without-human-verification_GM406889139.pdfIn PDF document text
    • http://e-mailservis.cz/images/free-ways-to-get-robux_GM431946152.pdfIn PDF document text
    • http://e-mailservis.cz/images/roblox-free-robux_GM431946152.pdfIn PDF document text
    • http://e-mailservis.cz/images/archery-master-3d-apk-and-mod-free-download-unlimited-coins_GM406889139.pdfIn PDF document text
    • http://e-mailservis.cz/images/coin-master-hack-spin-generator-tool_GM406889139.pdfIn PDF document text
    • http://e-mailservis.cz/images/coin-master-get-free-cards_GM406889139.pdfIn PDF document text
    • http://e-mailservis.cz/images/google-roblox-games_GM431946152.pdfIn PDF document text
    • http://e-mailservis.cz/images/how-to-get-free-robux-without-any-verification_GM431946152.pdfIn PDF document text
    • http://e-mailservis.cz/images/master-coin-hack_GM406889139.pdfIn PDF document text
    • http://e-mailservis.cz/images/coin-master-hacks-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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004f3f.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4F3F 25892 bytes
SHA-256: 9d738c08f48ecaddb8540e9be02930e24d0e17af5b87ce027900c70160cc9a74
font_01_sfnt_off000088d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x88D1 4028 bytes
SHA-256: a17c2a746d49ac23b23e38a371e32fddecfcd91b10cf42ff6155bff6b8a07e91
font_02_sfnt_off00009672.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9672 2788 bytes
SHA-256: 6fd7c7f447d66842f81aa8cf197935b17f22157d0c7e9f95622df1b5b4ddf530
font_03_sfnt_off0000a062.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA062 18228 bytes
SHA-256: e7a46ecd3c3d6b5b9fab8b48fe890140ab6e75c9a4df77531e3aad29f6ea7524

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