Malicious PDF — malware analysis report

Static analysis result for SHA-256 21e67a6f41dc2f31…

MALICIOUS

PDF

40.8 KB Created: 2021-05-12 01:41:43 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 05ec914d2a576ff89e12439d68f99f63 SHA-1: 05603462c447c0fad45db13795006564d7715a16 SHA-256: 21e67a6f41dc2f31840a31766009cb62d77076f07654bde1f6a6302242929801
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded links that point to known malicious redirector infrastructure, specifically targeting users with 'game hack' lures. The ML classifier also strongly indicated maliciousness. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest an attempt to redirect the user to a malicious website, likely for further exploitation or phishing.

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-real-hack-game-hack In PDF document text
    • http://whiteyaknepal.com/userfiles/files/how-to-hack-someones-account-on-roblox_GM431946152.pdfIn PDF document text
    • http://whiteyaknepal.com/userfiles/files/free-roblox-accounts-with-robux-that-work-2021_GM431946152.pdfIn PDF document text
    • http://whiteyaknepal.com/userfiles/files/coin-master-free-cards-hack_GM406889139.pdfIn PDF document text
    • http://whiteyaknepal.com/userfiles/files/free-robux-real-2021_GM431946152.pdfIn PDF document text
    • http://whiteyaknepal.com/userfiles/files/minecraft-114-4-download_GM479516143.pdfIn PDF document text
    • http://whiteyaknepal.com/userfiles/files/free-coin-master-spins-and-coins_GM406889139.pdfIn PDF document text
    • http://whiteyaknepal.com/userfiles/files/coin-master-invite-friends-hack_GM406889139.pdfIn PDF document text
    • http://whiteyaknepal.com/userfiles/files/coin-master-free-spins-and-cards_GM406889139.pdfIn PDF document text
    • http://whiteyaknepal.com/userfiles/files/coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • http://whiteyaknepal.com/userfiles/files/minecraft-for-chromebook-free_GM479516143.pdfIn PDF document text
    • http://whiteyaknepal.com/userfiles/files/coin-master-hack-no-human-verification_GM406889139.pdfIn PDF document text
    • http://whiteyaknepal.com/userfiles/files/free-spins-on-coin-master-link_GM406889139.pdfIn PDF document text
    • http://whiteyaknepal.com/userfiles/files/earn-free-robux_GM431946152.pdfIn PDF document text
    • http://whiteyaknepal.com/userfiles/files/free-robux-instantly_GM431946152.pdfIn PDF document text
    • http://whiteyaknepal.com/userfiles/files/how-to-get-free-robux-hack-2021_GM431946152.pdfIn PDF document text
    • http://whiteyaknepal.com/userfiles/files/how-do-i-get-free-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://whiteyaknepal.com/userfiles/files/free-robux-com-real_GM431946152.pdfIn PDF document text
    • http://whiteyaknepal.com/userfiles/files/best-hack-for-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://whiteyaknepal.com/userfiles/files/coin-master-download_GM406889139.pdfIn PDF document text
    • http://whiteyaknepal.com/userfiles/files/free-coins-on-coin-master_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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004600.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4600 24608 bytes
SHA-256: 5e306a146fb7f3c6d5d8c7dc4d9e5932fe09ba7a932ce5fc93cdd12f4c2f0a13
font_01_sfnt_off00007ea1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7EA1 17788 bytes
SHA-256: 17f046e272c8ee70cc4b817224b52c180b33e2590cfcc2d916d545b5a6c5f49a

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