Malicious PDF — malware analysis report

Static analysis result for SHA-256 5362b2f03081a2a8…

MALICIOUS

PDF

37.3 KB Created: 2021-07-03 21:54:55 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 41b0a5515791579c22f7f404137c11c3 SHA-1: 0f7b635482f820843e7b5e3962408bf656497e71 SHA-256: 5362b2f03081a2a8114240f87fd0e6704b9737860fe215c0e5b260790335dcd7
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document contains multiple links that lead to known malicious redirector infrastructure, specifically advertising free game currency or hacks. The primary lure URL is http://netcdn.tw/app/406889139/links-to-get-free-spins-on-coin-master-game-hack. The document body and embedded links are designed to trick users into clicking through to potentially malicious websites, likely for further exploitation or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 http://netcdn.tw/app/406889139/links-to-get-free-spins-on-coin-master-game-hack In PDF document text
    • http://www.sharp-calculators.com/files/ckfinder/files/minecraft-free-download-pc_GM479516143.pdfIn PDF document text
    • http://www.sharp-calculators.com/files/ckfinder/files/pro-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://www.sharp-calculators.com/files/ckfinder/files/rbx-free_GM431946152.pdfIn PDF document text
    • http://www.sharp-calculators.com/files/ckfinder/files/how-to-get-free-robux-on-iphone_GM431946152.pdfIn PDF document text
    • http://www.sharp-calculators.com/files/ckfinder/files/daily-free-spins_GM406889139.pdfIn PDF document text
    • http://www.sharp-calculators.com/files/ckfinder/files/free-robux-for-kids-no-verification_GM431946152.pdfIn PDF document text
    • http://www.sharp-calculators.com/files/ckfinder/files/free-robux-generator-com-roblox-hack_GM431946152.pdfIn PDF document text
    • http://www.sharp-calculators.com/files/ckfinder/files/minecraft-windows-10-edition-free_GM479516143.pdfIn PDF document text
    • http://www.sharp-calculators.com/files/ckfinder/files/can-you-make-a-minecraft-server-for-free_GM479516143.pdfIn PDF document text
    • http://www.sharp-calculators.com/files/ckfinder/files/free-robux-2021_GM431946152.pdfIn PDF document text
    • http://www.sharp-calculators.com/files/ckfinder/files/how-to-get-free-robux-without-doing-anything-2021_GM431946152.pdfIn PDF document text
    • http://www.sharp-calculators.com/files/ckfinder/files/free-robux-no-survey_GM431946152.pdfIn PDF document text
    • http://www.sharp-calculators.com/files/ckfinder/files/minecraft-windows-10-free_GM479516143.pdfIn PDF document text
    • http://www.sharp-calculators.com/files/ckfinder/files/free-robux-apk_GM431946152.pdfIn PDF document text
    • http://www.sharp-calculators.com/files/ckfinder/files/free-robux-website_GM431946152.pdfIn PDF document text
    • http://www.sharp-calculators.com/files/ckfinder/files/pokemon-go-free-647_GM1094591345.pdfIn PDF document text
    • http://www.sharp-calculators.com/files/ckfinder/files/roblox-person_GM431946152.pdfIn PDF document text
    • http://www.sharp-calculators.com/files/ckfinder/files/give-free-robux_GM431946152.pdfIn PDF document text
    • http://www.sharp-calculators.com/files/ckfinder/files/free-tiktok-likes-no-human-verification-or-download_GM835599320.pdfIn PDF document text
    • http://www.sharp-calculators.com/files/ckfinder/files/free-minecraft-skins-pe_GM479516143.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off0000391f.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x391F 23840 bytes
SHA-256: 43d95170fed564866cc6c3a7e8e3aab992e06fcd8e36e472d15b5b0440399746
font_01_sfnt_off00006f5b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6F5B 18344 bytes
SHA-256: 1dde3a634a35d4e9c8cc8702715575f7350bc413b734fd9f7bac35511dc11ac3