Malicious PDF — malware analysis report

Static analysis result for SHA-256 1e4beaa918b0e3a9…

MALICIOUS

PDF

42.1 KB Created: 2021-05-12 00:33:04 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: aa1c339062dfac6f37aa128835c4262e SHA-1: 16fc04ac927efeddb3c46f2730b67d09a456480c SHA-256: 1e4beaa918b0e3a9416a78fac008bbb6dea4a082a45d71c6e2c022a03c436c5b
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains embedded URLs and text that lure users into clicking links for game-related cheats and freebies, specifically for Coin Master. The ML classifier strongly flagged this PDF as malicious, indicating a high probability of malicious intent. The presence of external URIs suggests the document is designed to redirect users to download further malicious content or visit phishing sites.

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/coin-master-free-spins-links-2021-game-hack In PDF document text
    • http://apx-centre.ru/images/hackear-coin-master_GM406889139.pdfIn PDF document text
    • http://apx-centre.ru/images/coin-master-free-cards-link-2021_GM406889139.pdfIn PDF document text
    • http://apx-centre.ru/images/free-spins-for-coin-master-ios_GM406889139.pdfIn PDF document text
    • http://apx-centre.ru/images/free-robux-2021_GM431946152.pdfIn PDF document text
    • http://apx-centre.ru/images/how-to-hack-roblox-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://apx-centre.ru/images/www-free-robux_GM431946152.pdfIn PDF document text
    • http://apx-centre.ru/images/how-to-get-free-roebucks-in-roblox_GM431946152.pdfIn PDF document text
    • http://apx-centre.ru/images/synapse-roblox-free-download_GM431946152.pdfIn PDF document text
    • http://apx-centre.ru/images/free-minecraft-alts_GM479516143.pdfIn PDF document text
    • http://apx-centre.ru/images/level-coin_GM406889139.pdfIn PDF document text
    • http://apx-centre.ru/images/2021-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://apx-centre.ru/images/coin-master-daily-free-spins-link-march-2021_GM406889139.pdfIn PDF document text
    • http://apx-centre.ru/images/free-roblox-codes_GM431946152.pdfIn PDF document text
    • http://apx-centre.ru/images/download-hacked-games-com-coin-master_GM406889139.pdfIn PDF document text
    • http://apx-centre.ru/images/free-robux-no-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • http://apx-centre.ru/images/coin-master-free-spins-and-coins-daily-links_GM406889139.pdfIn PDF document text
    • http://apx-centre.ru/images/how-to-get-2021-robux-for-free_GM431946152.pdfIn PDF document text
    • http://apx-centre.ru/images/roblox-girl_GM431946152.pdfIn PDF document text
    • http://apx-centre.ru/images/minecraft-free-download-windows_GM479516143.pdfIn PDF document text
    • http://apx-centre.ru/images/how-to-get-free-roblox_GM431946152.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_003_off0000494f.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x494F 24660 bytes
SHA-256: af46f67d829ab76f2fdcd434749081d40c4f6f92af764656130613d2b79f5dff
font_01_sfnt_off0000818d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x818D 18456 bytes
SHA-256: 405c435adaafa0da304b7a4986d8f56c56dc87ed278d5cff2ac0c57977d8d7e3

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