Malicious PDF — malware analysis report

Static analysis result for SHA-256 d497fcb813c9624c…

MALICIOUS

PDF

33.1 KB Created: 2021-07-06 03:18:03 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: b95d0c6a3b240e045a6b61c1d02e8485 SHA-1: ab1ece2c30624269a887013629f9994374bb64fb SHA-256: d497fcb813c9624cb6530453c0ff7bd065a5bf4b761ab5bfcf4865452333f603
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains multiple links to known malicious redirectors and infrastructure, disguised as game hacks and generators. The document body and embedded URLs strongly suggest a lure to trick users into visiting these sites, likely for further malware delivery or credential harvesting. No scripts were extracted, but the PDF structure and linked content indicate a malicious intent.

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/431946152/lazyblocks-com-robux-game-hack In PDF document text
    • http://windhorsetrek.com/userfiles/files/how-do-you-get-free-robux-without-doing-anything_GM431946152.pdfIn PDF document text
    • http://windhorsetrek.com/userfiles/files/irobux-com-redeem_GM431946152.pdfIn PDF document text
    • http://windhorsetrek.com/userfiles/files/master-free-spin-and-coin-links-html-m-1_GM406889139.pdfIn PDF document text
    • http://windhorsetrek.com/userfiles/files/tiktok-free-unlimited-likes_GM835599320.pdfIn PDF document text
    • http://windhorsetrek.com/userfiles/files/youtube-hack-aimbot-roblox_GM431946152.pdfIn PDF document text
    • http://windhorsetrek.com/userfiles/files/is-roblox-studio-free_GM431946152.pdfIn PDF document text
    • http://windhorsetrek.com/userfiles/files/how-to-hack-thinknoodles-roblox-account_GM431946152.pdfIn PDF document text
    • http://windhorsetrek.com/userfiles/files/free-coin-master-spins-link_GM406889139.pdfIn PDF document text
    • http://windhorsetrek.com/userfiles/files/free-printable-minecraft-coloring-pages_GM479516143.pdfIn PDF document text
    • http://windhorsetrek.com/userfiles/files/how-to-get-free-tokens-in-minecraft-ps4_GM479516143.pdfIn PDF document text
    • http://windhorsetrek.com/userfiles/files/coin-master-working-hack_GM406889139.pdfIn PDF document text
    • http://windhorsetrek.com/userfiles/files/how-to-get-free-robux-on-android_GM431946152.pdfIn PDF document text
    • http://windhorsetrek.com/userfiles/files/coin-master-hack-facebook_GM406889139.pdfIn PDF document text
    • http://windhorsetrek.com/userfiles/files/descargar-hack-coin-master_GM406889139.pdfIn PDF document text
    • http://windhorsetrek.com/userfiles/files/mcpe-master-hack-coin-apk_GM406889139.pdfIn PDF document text
    • http://windhorsetrek.com/userfiles/files/how-to-get-free-roblox-items_GM431946152.pdfIn PDF document text
    • http://windhorsetrek.com/userfiles/files/coin-drop-master-free_GM406889139.pdfIn PDF document text
    • http://windhorsetrek.com/userfiles/files/how-do-we-get-free-robux_GM431946152.pdfIn PDF document text
    • http://windhorsetrek.com/userfiles/files/roblox-hack-download_GM431946152.pdfIn PDF document text
    • http://windhorsetrek.com/userfiles/files/how-to-get-free-minecraft-skins_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
font_00_sfnt_off00002cba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2CBA 21368 bytes
SHA-256: 9a71e656eb710c6aefe696a00efb8ef319a93820cda366cf614b6e511c12f4b4
font_01_sfnt_off00005b5d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5B5D 19320 bytes
SHA-256: 52be431e2479892243aaa080475f5659373002af5ea9ad85b1a3eaa30be58de6

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