Malicious PDF — malware analysis report

Static analysis result for SHA-256 fceb90be1c210acf…

MALICIOUS

PDF

35.8 KB Created: 2021-06-29 02:48:58 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: aa7fdc43c19496fc1e49c44d591f543b SHA-1: 7925f7dd67677e3ab2207946a9ac5edaea71dc38 SHA-256: fceb90be1c210acf9bda5c825b222041b1069e10bb592f299e22904a9dfca5ca
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a malicious link disguised as a 'game hack generator' and a call-to-action button, aiming to trick users into downloading a payload. The ML classifier strongly flagged this PDF as malicious, and multiple heuristics indicate it links to known malicious redirector infrastructure. No scripts were extracted, but the overall pattern suggests a phishing lure for malware delivery.

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.co/app/431946152/how-to-get-free-robux-fast-and-easy-on-ipad-game-hack In PDF document text
    • http://pustaka.fkm.unand.ac.id/repository/how-to-hack-roblox-accounts-2021-with-wireshark_GM431946152.pdfIn PDF document text
    • http://pustaka.fkm.unand.ac.id/repository/destruction-simulator-codes-roblox-hack-para_GM431946152.pdfIn PDF document text
    • http://pustaka.fkm.unand.ac.id/repository/how-to-get-free-robux-in-roblox-no-download_GM431946152.pdfIn PDF document text
    • http://pustaka.fkm.unand.ac.id/repository/coin-master-free-link_GM406889139.pdfIn PDF document text
    • http://pustaka.fkm.unand.ac.id/repository/roblox-high-school-life-free-stuff_GM431946152.pdfIn PDF document text
    • http://pustaka.fkm.unand.ac.id/repository/free-skin-codes-roblox_GM431946152.pdfIn PDF document text
    • http://pustaka.fkm.unand.ac.id/repository/free-robux-youtubbe_GM431946152.pdfIn PDF document text
    • http://pustaka.fkm.unand.ac.id/repository/www-roblox-cheat-com_GM431946152.pdfIn PDF document text
    • http://pustaka.fkm.unand.ac.id/repository/comment-crer-un-hack-pour-roblox_GM431946152.pdfIn PDF document text
    • http://pustaka.fkm.unand.ac.id/repository/how-to-get-free-gamepasses-roblox_GM431946152.pdfIn PDF document text
    • http://pustaka.fkm.unand.ac.id/repository/roblox-hack-ios-2021_GM431946152.pdfIn PDF document text
    • http://pustaka.fkm.unand.ac.id/repository/crib-roblox-hacks_GM431946152.pdfIn PDF document text
    • http://pustaka.fkm.unand.ac.id/repository/roblox-harry-potter-games-free_GM431946152.pdfIn PDF document text
    • http://pustaka.fkm.unand.ac.id/repository/roblox-bucks-hack-deutsch-erfahrungen_GM431946152.pdfIn PDF document text
    • http://pustaka.fkm.unand.ac.id/repository/cheaten-bei-roblox_GM431946152.pdfIn PDF document text
    • http://pustaka.fkm.unand.ac.id/repository/how-to-get-free-robux-2021-unpatched-trackid-sp006_GM431946152.pdfIn PDF document text
    • http://pustaka.fkm.unand.ac.id/repository/rbl-robux-gives-roblox-hack_GM431946152.pdfIn PDF document text
    • http://pustaka.fkm.unand.ac.id/repository/robux-cheat-engine-64-download_GM431946152.pdfIn PDF document text
    • http://pustaka.fkm.unand.ac.id/repository/how-to-get-free-robux-without-surveys_GM431946152.pdfIn PDF document text
    • http://pustaka.fkm.unand.ac.id/repository/follow-people-inyo-roblox-games-hack_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_off00003326.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3326 22524 bytes
SHA-256: aa499d1f69ce54149cda2e74f08e2d3ffec5c4571900b16ef485e0c74fa63a5c
font_01_sfnt_off00006598.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6598 19512 bytes
SHA-256: eb7a1cd63a08954e90d5a96b7c32185d90849f997bb7ec3bbd65c08332056514

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