Malicious PDF — malware analysis report

Static analysis result for SHA-256 53a8c1b6fce18fd3…

MALICIOUS

PDF

41.5 KB Created: 2021-05-16 15:28:05 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: e36fb0c82e7d5916de8a81b3d3c1beac SHA-1: 26e4b5a7f6e7ccc07b0c789a3f7b1cdb74486fc5 SHA-256: 53a8c1b6fce18fd337a44b79a7bc8ae88673d268bc8ba46c59b9bc72cc07a612
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded URLs that redirect to malicious infrastructure, masquerading as a "free generator / game hack". The heuristic firings confirm the presence of malicious redirector links and a lure for game-related cheats. While no scripts were explicitly extracted, the nature of the embedded links suggests a phishing or scam attempt to drive traffic to potentially harmful 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/free-coin-master-link-2021-game-hack In PDF document text
    • http://altc.de/images/coin-master-hack-online-pc_GM406889139.pdfIn PDF document text
    • http://altc.de/images/como-hackear-coin-master-en-espaol_GM406889139.pdfIn PDF document text
    • http://altc.de/images/free-coins-coin-master-blog_GM406889139.pdfIn PDF document text
    • http://altc.de/images/free-robux-websites-2021_GM431946152.pdfIn PDF document text
    • http://altc.de/images/best-free-coin-master-spins_GM406889139.pdfIn PDF document text
    • http://altc.de/images/coin-master-mod-apk-hack_GM406889139.pdfIn PDF document text
    • http://altc.de/images/how-to-hack-coin-master_GM406889139.pdfIn PDF document text
    • http://altc.de/images/how-to-download-wurst_GM479516143.pdfIn PDF document text
    • http://altc.de/images/free-minecraft-alt-accounts_GM479516143.pdfIn PDF document text
    • http://altc.de/images/coin-master-free-coins-and-spins-link_GM406889139.pdfIn PDF document text
    • http://altc.de/images/how-to-earn-robux-by-playing-games_GM431946152.pdfIn PDF document text
    • http://altc.de/images/free-robux-generator_GM431946152.pdfIn PDF document text
    • http://altc.de/images/can-you-hack-coin-master_GM406889139.pdfIn PDF document text
    • http://altc.de/images/coin-master-50-spin-link_GM406889139.pdfIn PDF document text
    • http://altc.de/images/master-free-spin_GM406889139.pdfIn PDF document text
    • http://altc.de/images/how-to-win-attack-madness-in-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://altc.de/images/minecraft-thumbnail-maker-free_GM479516143.pdfIn PDF document text
    • http://altc.de/images/free-robux-generator-no-survey_GM431946152.pdfIn PDF document text
    • http://altc.de/images/lots-of-robux_GM431946152.pdfIn PDF document text
    • http://altc.de/images/minecraft-account-hacked_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_003_off00004796.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4796 24840 bytes
SHA-256: 1b9bc585a9d17d1c053895d2a30113915ac676631c713b4295d8a0da728d1c75
font_01_sfnt_off00007f89.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7F89 18284 bytes
SHA-256: 15cbb039240871f663533138b429172a54e714a7a81015087603783b9c5e24ba

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