Malicious PDF — malware analysis report

Static analysis result for SHA-256 fc921277023d59d4…

MALICIOUS

PDF

47.7 KB Created: 2021-05-15 04:35:34 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 659c7621086e18ec6db73ad42e2ce389 SHA-1: 8f03447edd54e44714e5d6f3a962a4053e251ea0 SHA-256: fc921277023d59d4251d30c7ec688b4d371c390c92028600062077f465a07331
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to known malicious redirector infrastructure, specifically promoting "game hacks" and "free spins" for Coin Master. The document body, though partially corrupted, contains a URL consistent with the malicious links. The presence of embedded URLs and the lure theme strongly suggest a phishing or scam attempt, likely delivered as a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9013

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-rewards-game-hack In PDF document text
    • http://wirelesscommsys.com/images/coin-master-free-spins-and-coins-2021_GM406889139.pdfIn PDF document text
    • http://wirelesscommsys.com/images/how-to-get-roblox-money_GM431946152.pdfIn PDF document text
    • http://wirelesscommsys.com/images/coin-master-hack-online-cheat_GM406889139.pdfIn PDF document text
    • http://wirelesscommsys.com/images/hacks-para-coin-master_GM406889139.pdfIn PDF document text
    • http://wirelesscommsys.com/images/inappropriate-roblox-games_GM431946152.pdfIn PDF document text
    • http://wirelesscommsys.com/images/coin-master-free-spins-23-march-2021_GM406889139.pdfIn PDF document text
    • http://wirelesscommsys.com/images/my-roblox-avatar_GM431946152.pdfIn PDF document text
    • http://wirelesscommsys.com/images/free-appsfor-coin-master-daily-rewards_GM406889139.pdfIn PDF document text
    • http://wirelesscommsys.com/images/free-spin-coin-master-2021-link_GM406889139.pdfIn PDF document text
    • http://wirelesscommsys.com/images/daily-free-coin-and-spin-link-for-coin-master_GM406889139.pdfIn PDF document text
    • http://wirelesscommsys.com/images/roblox-robux-hack_GM431946152.pdfIn PDF document text
    • http://wirelesscommsys.com/images/how-to-win-free-robux_GM431946152.pdfIn PDF document text
    • http://wirelesscommsys.com/images/get-more-robux_GM431946152.pdfIn PDF document text
    • http://wirelesscommsys.com/images/free-robux-without-human-verification-real_GM431946152.pdfIn PDF document text
    • http://wirelesscommsys.com/images/minecraft-pe-mod-menu_GM479516143.pdfIn PDF document text
    • http://wirelesscommsys.com/images/coin-master-free-spins-link-today-new-2021_GM406889139.pdfIn PDF document text
    • http://wirelesscommsys.com/images/windows-10-minecraft-hacks_GM479516143.pdfIn PDF document text
    • http://wirelesscommsys.com/images/how-do-you-earn-robux_GM431946152.pdfIn PDF document text
    • http://wirelesscommsys.com/images/make-your-own-minecraft-server-free_GM479516143.pdfIn PDF document text
    • http://wirelesscommsys.com/images/coin-master-spin-hack_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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off000049e9.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x49E9 25424 bytes
SHA-256: d684b797d100f2a2e640c1ff2015b31ed83ad831deaefcaf2a9e27a8d7f2b280
font_01_sfnt_off00008474.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8474 8676 bytes
SHA-256: e06aca5f85e50ae6cefda302c5299c18ab6d27c174f74f0bb0ee8efa7ccb4468
font_02_sfnt_off000098ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x98FF 17884 bytes
SHA-256: acbd2960432ed6aaee9cffad063da1b3d43b5b4e200ce15de4e80cb136e5b59b

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