Malicious PDF — malware analysis report

Static analysis result for SHA-256 90723cd94e1b0e18…

MALICIOUS

PDF

43.4 KB Created: 2021-05-16 07:38:28 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 775297f72fa1c9d86eaba15533c75abd SHA-1: 61e9da2560bc944ce7b3f76604c9c6cc19895d82 SHA-256: 90723cd94e1b0e18dd3688ef58cd7489dbff55a7cb027e2cc5885a389f7b18e4
160 Risk Score

Malware Insights

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

This PDF document contains multiple links to known malicious redirectors, disguised as 'free generator' or 'game hack' lures. The primary URL identified is https://netcdn.xyz/app/431946152/free-robux-no-verification-2021-android-game-hack, which is part of a campaign to trick users into visiting potentially harmful sites. No scripts were extracted, but the embedded URLs and heuristic firings strongly indicate a phishing or redirection attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

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-no-verification-2021-android-game-hack In PDF document text
    • https://zabota-kashira.ru/images/how-do-u-get-free-robux_GM431946152.pdfIn PDF document text
    • https://zabota-kashira.ru/images/free-coin-master-spins-for-today_GM406889139.pdfIn PDF document text
    • https://zabota-kashira.ru/images/get-free-robux-today_GM431946152.pdfIn PDF document text
    • https://zabota-kashira.ru/images/coin-master-hack-spins-android_GM406889139.pdfIn PDF document text
    • https://zabota-kashira.ru/images/robux-today_GM431946152.pdfIn PDF document text
    • https://zabota-kashira.ru/images/how-to-get-free-robux-without-downloading-apps-2021_GM431946152.pdfIn PDF document text
    • https://zabota-kashira.ru/images/coin-master-hack-apk-download-2021_GM406889139.pdfIn PDF document text
    • https://zabota-kashira.ru/images/how-to-make-robux_GM431946152.pdfIn PDF document text
    • https://zabota-kashira.ru/images/coin-master-hack-tool-v1-9-download-free-pc_GM406889139.pdfIn PDF document text
    • https://zabota-kashira.ru/images/minecraft-handbook_GM479516143.pdfIn PDF document text
    • https://zabota-kashira.ru/images/coin-master-daily-free-spins-blogspot_GM406889139.pdfIn PDF document text
    • https://zabota-kashira.ru/images/how-to-get-free-coins-in-mcpe-master_GM406889139.pdfIn PDF document text
    • https://zabota-kashira.ru/images/free-robux-no-apps_GM431946152.pdfIn PDF document text
    • https://zabota-kashira.ru/images/coin-master-free-spins-coins_GM406889139.pdfIn PDF document text
    • https://zabota-kashira.ru/images/roblox-fun-com-free-robux_GM431946152.pdfIn PDF document text
    • https://zabota-kashira.ru/images/roblox-download_GM431946152.pdfIn PDF document text
    • https://zabota-kashira.ru/images/robux-free-gift-card_GM431946152.pdfIn PDF document text
    • https://zabota-kashira.ru/images/coin-master-rewards-2021_GM406889139.pdfIn PDF document text
    • https://zabota-kashira.ru/images/wurst-mc_GM479516143.pdfIn PDF document text
    • https://zabota-kashira.ru/images/free-coins-app-for-coin-master_GM406889139.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_off00004834.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4834 26888 bytes
SHA-256: 8bf8a64b076f2bb23f81c43f65e0ecca463872f26e7ff0bca6f402749bad4a12
font_01_sfnt_off0000849d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x849D 19176 bytes
SHA-256: 2db8195158682863467aa5049c27493158ce29af4e73d213a7d216c5b0c72741

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