Malicious PDF — malware analysis report

Static analysis result for SHA-256 ad4c90a39b50527c…

MALICIOUS

PDF

41.5 KB Created: 2021-04-27 08:42:14 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 9d67b47f4608adea61e2f2eec6ad830e SHA-1: 71025ff271c3b776fe5dd6d26181c13407890872 SHA-256: ad4c90a39b50527cf79b23f9d5adf916411fb93ee39760fba493a0eb272e579f
160 Risk Score

Malware Insights

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

This PDF document contains multiple links and a call-to-action lure related to game hacks and free Robux. The primary link redirects to known malicious infrastructure, indicating a phishing or scam attempt. While no scripts were explicitly extracted, the presence of embedded URLs and the nature of the lure suggest a social engineering attack designed to lead users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9941

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/431946152/free-robux-generator-for-xbox-one-game-hack In PDF document text
    • https://elearning.matsanesa.net/__statics/gudangsoal/files/how-to-hack-roblox-legends-of-speed.pdfIn PDF document text
    • https://elearning.matsanesa.net/__statics/gudangsoal/files/free-animations-roblox-catalog.pdfIn PDF document text
    • https://elearning.matsanesa.net/__statics/gudangsoal/files/how-to-god-hack-on-roblox-with-cheat-engine-64.pdfIn PDF document text
    • https://elearning.matsanesa.net/__statics/gudangsoal/files/1x1x1x1x-roblox-hack.pdfIn PDF document text
    • https://elearning.matsanesa.net/__statics/gudangsoal/files/earn-free-robux-by-just-not-paying.pdfIn PDF document text
    • https://elearning.matsanesa.net/__statics/gudangsoal/files/cheat-roblox-windows-10-magnet-simulator.pdfIn PDF document text
    • https://elearning.matsanesa.net/__statics/gudangsoal/files/how-to-hack-a-roblox-server-2021.pdfIn PDF document text
    • https://elearning.matsanesa.net/__statics/gudangsoal/files/javascript-hack-roblox.pdfIn PDF document text
    • https://elearning.matsanesa.net/__statics/gudangsoal/files/roblox-piano-hack-script.pdfIn PDF document text
    • https://elearning.matsanesa.net/__statics/gudangsoal/files/roblox-free-robux-2021-august-promocode-yt.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
stream_003_off00004243.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4243 27516 bytes
SHA-256: 67e3a10a2910a772dbeadbaa325507724e7bdc8e2e1213b436e23f168d8e84e1
font_01_sfnt_off0000806f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x806F 18344 bytes
SHA-256: 95e87af2f61df55034967fff5cc346aa5419741618b3460f2847499dc7fed05c