Malicious PDF — malware analysis report

Static analysis result for SHA-256 e852ff7b3858ab00…

MALICIOUS

PDF

42.6 KB Created: 2021-05-20 04:05:30 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 30accbc61567379c5559c7a40618cad0 SHA-1: 7137996caac6bf6ce898b1b7fbde2f08ce13f9c9 SHA-256: e852ff7b3858ab0043a0f5619000cb7de8c7cc27001505977dc9f503a70eba0b
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links that redirect to known malicious infrastructure, specifically promoting game hacks and cheats. The document body and embedded links strongly suggest a social engineering lure to drive traffic to potentially malicious sites. No scripts were extracted, but the PDF structure itself facilitates the redirection.

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/hack-version-coin-master-apk-game-hack In PDF document text
    • http://kukuck.de/images/coin-master-free-coins-today_GM406889139.pdfIn PDF document text
    • http://kukuck.de/images/coin-master-free-spins-link-quora_GM406889139.pdfIn PDF document text
    • http://kukuck.de/images/free-robux-promo-codes-2021_GM431946152.pdfIn PDF document text
    • http://kukuck.de/images/robux-hack-generator_GM431946152.pdfIn PDF document text
    • http://kukuck.de/images/google-roblox-games_GM431946152.pdfIn PDF document text
    • http://kukuck.de/images/roblox-com-robux_GM431946152.pdfIn PDF document text
    • http://kukuck.de/images/coin-master-free-spins-app_GM406889139.pdfIn PDF document text
    • http://kukuck.de/images/free-robux-download_GM431946152.pdfIn PDF document text
    • http://kukuck.de/images/how-to-get-free-robux-gift-cards_GM431946152.pdfIn PDF document text
    • http://kukuck.de/images/free-spins-coin-master-november-2021_GM406889139.pdfIn PDF document text
    • http://kukuck.de/images/free-roblox-accounts-with-robux-that-work-2021_GM431946152.pdfIn PDF document text
    • http://kukuck.de/images/i-need-more-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://kukuck.de/images/get-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://kukuck.de/images/how-to-get-free-robux-without-download-apps-or-survey_GM431946152.pdfIn PDF document text
    • http://kukuck.de/images/cute-free-roblox-outfits_GM431946152.pdfIn PDF document text
    • http://kukuck.de/images/if-you-delete-minecraft-can-you-redownload-it-for-free_GM479516143.pdfIn PDF document text
    • http://kukuck.de/images/roblox-hack-unlimited-robux_GM431946152.pdfIn PDF document text
    • http://kukuck.de/images/get-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • http://kukuck.de/images/oprewards-free-robux_GM431946152.pdfIn PDF document text
    • http://kukuck.de/images/coin-master-game-hack-app-download_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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004b18.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4B18 24924 bytes
SHA-256: 63f5392960168dbb95f40a470907e6f1376b850d53cd1b806e6e41aacb53dda6
font_01_sfnt_off000084bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x84BC 18028 bytes
SHA-256: 3f168c1f6698dcf2dd7090d469e87ca8ddd6c2d99ef7bd4e7b306b99a7cfc93f

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