Malicious PDF — malware analysis report

Static analysis result for SHA-256 855cc2c2c40dcbcf…

MALICIOUS

PDF

34.2 KB Created: 2021-07-06 08:57:05 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 80db8c6f6edace327c2eb5f638c72914 SHA-1: cbf4f852889be46129f60b05c422d520cab9da22 SHA-256: 855cc2c2c40dcbcfb64e78b69aaa4215c2f11a5efb74d42ceac6a1cdc7736eb4
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous links to external websites, including one at http://netcdn.tw/app/406889139/how-to-get-free-spins-for-coin-master-game-hack, which is likely a lure for users seeking free in-game items. The ML classifier strongly flagged this PDF as malicious, and the presence of embedded URLs and a 'download button' heuristic further supports a malicious intent. No scripts were extracted, but the overall pattern suggests a phishing or malware distribution attempt.

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/how-to-get-free-spins-for-coin-master-game-hack In PDF document text
    • https://www.xenonsvjetla.com/files/coin-master-free-spins-coins_GM406889139.pdfIn PDF document text
    • https://www.xenonsvjetla.com/files/how-to-get-free-mods-in-minecraft_GM479516143.pdfIn PDF document text
    • https://www.xenonsvjetla.com/files/get-free-spins-coin-master-link_GM406889139.pdfIn PDF document text
    • https://www.xenonsvjetla.com/files/free-robux-hack-by-justin-master_GM431946152.pdfIn PDF document text
    • http://xenonsvjetla.com/files/free-robux-generator-no-verification-2021_GM431946152.pdfIn PDF document text
    • http://xenonsvjetla.com/files/free-roblox-accounts_GM431946152.pdfIn PDF document text
    • https://www.xenonsvjetla.com/files/roblox-john-doe-hacker_GM431946152.pdfIn PDF document text
    • https://www.xenonsvjetla.com/files/spinuri-gratis-coin-master_GM406889139.pdfIn PDF document text
    • http://xenonsvjetla.com/files/roblox-promo-codes-free-robux_GM431946152.pdfIn PDF document text
    • https://www.xenonsvjetla.com/files/roblox-generator-free-dowload_GM431946152.pdfIn PDF document text
    • https://www.xenonsvjetla.com/files/minecraft-gun-games-free_GM479516143.pdfIn PDF document text
    • http://xenonsvjetla.com/files/freer-tiktok_GM835599320.pdfIn PDF document text
    • http://xenonsvjetla.com/files/www-roblox-com-robux-free_GM431946152.pdfIn PDF document text
    • https://www.xenonsvjetla.com/files/how-to-become-a-hacker-in-roblox_GM431946152.pdfIn PDF document text
    • https://www.xenonsvjetla.com/files/how-to-minecraft-for-free_GM479516143.pdfIn PDF document text
    • https://www.xenonsvjetla.com/files/minecraft-bedrock-for-free_GM479516143.pdfIn PDF document text
    • https://www.xenonsvjetla.com/files/how-to-make-hats-free-roblox_GM431946152.pdfIn PDF document text
    • https://www.xenonsvjetla.com/files/free-robux-codes-2021-generator_GM431946152.pdfIn PDF document text
    • https://www.xenonsvjetla.com/files/roblox-hack-download_GM431946152.pdfIn PDF document text
    • http://xenonsvjetla.com/files/free-spins-coin-master-blogspot_GM406889139.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
font_00_sfnt_off000030cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x30CB 22524 bytes
SHA-256: 6f153f22358bc9a74c942f52850abb9b7072dfff0d47f9d8051f28ecdc8f2c23
font_01_sfnt_off000062f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x62F5 18336 bytes
SHA-256: 23f71a9ba4d854b783c042dde3b810d75211435ebb04f16eb6963276a01a3aa2

Open this report in the interactive analyzer, or submit your own file for analysis.