Malicious PDF — malware analysis report

Static analysis result for SHA-256 698d71eb47d0736c…

MALICIOUS

PDF

34.4 KB Created: 2021-07-06 21:14:08 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 3b600fa806d9279f00df853a298da73a SHA-1: 18188dcbd080137b852258ddf27aa521686e845c SHA-256: 698d71eb47d0736c35c301084c35fe794ac9d27daa7ee54c6dd83925e7015a96
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains multiple links to known malicious redirectors and websites offering 'free game hacks' or 'robux', indicating a lure for users to visit potentially harmful sites. The ML classifier strongly flagged this PDF as malicious, and the presence of a download button heuristic further supports a malicious workflow. The document body, though partially garbled, contains URLs consistent with the malicious redirection lures.

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/www-free-robux-game-hack In PDF document text
    • http://empresa-venta.hr/files/free-robux-scam_GM431946152.pdfIn PDF document text
    • http://empresa-venta.hr/files/hack-da-hood-roblox_GM431946152.pdfIn PDF document text
    • http://empresa-venta.hr/files/how-to-get-free-tiktok-fans_GM835599320.pdfIn PDF document text
    • http://empresa-venta.hr/files/how-to-hack-roblox-for-robux_GM431946152.pdfIn PDF document text
    • http://empresa-venta.hr/files/free-roebucks_GM431946152.pdfIn PDF document text
    • http://empresa-venta.hr/files/coin-master-free-link-2021_GM406889139.pdfIn PDF document text
    • http://empresa-venta.hr/files/free-100-robux_GM431946152.pdfIn PDF document text
    • http://empresa-venta.hr/files/pastebin-free-roblox-2021_GM431946152.pdfIn PDF document text
    • http://empresa-venta.hr/files/roblox-pizza-tycoon-money-hack_GM431946152.pdfIn PDF document text
    • http://empresa-venta.hr/files/easy-robux-generator_GM431946152.pdfIn PDF document text
    • http://empresa-venta.hr/files/roblox-hack-free-2021-blogspot_GM431946152.pdfIn PDF document text
    • http://empresa-venta.hr/files/t-shirt-hacker-roblox_GM431946152.pdfIn PDF document text
    • http://empresa-venta.hr/files/coin-master-website_GM406889139.pdfIn PDF document text
    • http://empresa-venta.hr/files/minecraft-for-ipad-free_GM479516143.pdfIn PDF document text
    • http://empresa-venta.hr/files/roblox-cheat-engine-in-virtual-machine_GM431946152.pdfIn PDF document text
    • http://empresa-venta.hr/files/roblox-robux-hack-november-2021_GM431946152.pdfIn PDF document text
    • http://empresa-venta.hr/files/coin-master-update-2021_GM406889139.pdfIn PDF document text
    • http://empresa-venta.hr/files/free-robux-without-verification_GM431946152.pdfIn PDF document text
    • http://empresa-venta.hr/files/how-to-hack-someones-account-on-roblox_GM431946152.pdfIn PDF document text
    • http://empresa-venta.hr/files/how-do-we-get-free-robux_GM431946152.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_off00002fa1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2FA1 22216 bytes
SHA-256: 2973f4048c03ca1628acfc5edffe2019a9c47db147032740119770b3c97d3502
font_01_sfnt_off00006131.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6131 19080 bytes
SHA-256: acf5ca21e1b57f7804790e88d3c8e797014eccbd964a564fa6b8ab1e1ef3ee82

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