Malicious PDF — malware analysis report

Static analysis result for SHA-256 ff99717b11f00753…

MALICIOUS

PDF

45.6 KB Created: 2021-06-07 15:55:09 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: e3a687250a62eddf1fe79bcbb44843b2 SHA-1: d2b892b917fa61e6ad72d1c6baa64f4b21ef3082 SHA-256: ff99717b11f0075397f6bd240e520881cb39e0cfb2da92bd3964a349b5b3501a
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links that redirect to malicious infrastructure, specifically promoting game hacks and free currency generators. The ML classifier also flagged this PDF as malicious. The primary attack pattern involves luring users to click on these deceptive links, which likely leads to further malicious content or downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9864

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.tw/app/431946152/purest-roblox-phantom-forces-hack-game-hack In PDF document text
    • http://ozonizarint.com/images/how-to-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://ozonizarint.com/images/websites-that-give-you-free-robux_GM431946152.pdfIn PDF document text
    • http://ozonizarint.com/images/free-robux_GM431946152.pdfIn PDF document text
    • http://ozonizarint.com/images/roblox-free-robux-hack_GM431946152.pdfIn PDF document text
    • http://ozonizarint.com/images/roblox-hacks-2021_GM431946152.pdfIn PDF document text
    • http://ozonizarint.com/images/will-minecraft-dungeons-be-free_GM479516143.pdfIn PDF document text
    • http://ozonizarint.com/images/robux-free-gift-card-org-hack_GM431946152.pdfIn PDF document text
    • http://ozonizarint.com/images/minecraft-free-no-download_GM479516143.pdfIn PDF document text
    • http://ozonizarint.com/images/hacks-master-coin_GM406889139.pdfIn PDF document text
    • http://ozonizarint.com/images/free-roblox-acouts-full-with-robucks_GM431946152.pdfIn PDF document text
    • http://ozonizarint.com/images/minecraft-gun-games-free_GM479516143.pdfIn PDF document text
    • http://ozonizarint.com/images/how-to-get-minecraft-for-free-on-phone_GM479516143.pdfIn PDF document text
    • http://ozonizarint.com/images/coun-master_GM406889139.pdfIn PDF document text
    • http://ozonizarint.com/images/how-do-you-get-free-food-in-coin-master_GM406889139.pdfIn PDF document text
    • http://ozonizarint.com/images/rewards-roblox_GM431946152.pdfIn PDF document text
    • http://ozonizarint.com/images/free-disney-plus-accounts-tiktok_GM835599320.pdfIn PDF document text
    • http://ozonizarint.com/images/minecraft-windows-10-free-with-java_GM479516143.pdfIn PDF document text
    • http://ozonizarint.com/images/robuxmatchcom-free-robux_GM431946152.pdfIn PDF document text
    • http://ozonizarint.com/images/apps-for-free-robux_GM431946152.pdfIn PDF document text
    • http://ozonizarint.com/images/roblox-free-suits_GM431946152.pdfIn PDF document text
    • https://direct-link.netIn 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_004_off0000518a.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x518A 26212 bytes
SHA-256: bb7e552c60dd86ab1391a04f943f141173f6bdb0dd71cde311ee222bc0dd102e
font_01_sfnt_off00008d2b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8D2B 19172 bytes
SHA-256: 8c34ec610f226a73b66ccffcfa0513b3e021033a807eb42b7a758487de2f5cba

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