Malicious PDF — malware analysis report

Static analysis result for SHA-256 e99351e995c4e35c…

MALICIOUS

PDF

43.1 KB Created: 2021-05-19 04:46:21 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 71dee89fd225912e1a97f78d32e5a4eb SHA-1: 2f4a8dede58ca6a823c00f8e51699ce74633b52c SHA-256: e99351e995c4e35cc22fbb931ca040b33fa95d6e3ba65218a831aa1a245edfc1
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains multiple links to known malicious redirectors, specifically promoting 'game hacks' and 'free rewards' lures. The primary redirector identified is 'https://netcdn.xyz/app/406889139/coin-master-daily-free-rewards-game-hack', which is designed to trick users into clicking through to potentially harmful content. The presence of multiple similar PDF links suggests a campaign distributing these lures.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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/406889139/coin-master-daily-free-rewards-game-hack In PDF document text
    • https://lesegais.ru/images/windows-10-minecraft-hacks_GM479516143.pdfIn PDF document text
    • https://lesegais.ru/images/coin-master-hack-mod-game-download_GM406889139.pdfIn PDF document text
    • https://lesegais.ru/images/free-spin-link-coin-master-today_GM406889139.pdfIn PDF document text
    • https://lesegais.ru/images/roblox-earn-robux_GM431946152.pdfIn PDF document text
    • https://lesegais.ru/images/coin-master-free-spins-link-iphone_GM406889139.pdfIn PDF document text
    • https://lesegais.ru/images/how-can-you-get-free-robux_GM431946152.pdfIn PDF document text
    • https://lesegais.ru/images/free-spins-for-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://lesegais.ru/images/rbx-hut-promo-codes_GM431946152.pdfIn PDF document text
    • https://lesegais.ru/images/free-robux-generator-com-roblox-hack_GM431946152.pdfIn PDF document text
    • https://lesegais.ru/images/free-spins-on-coin-master-generator_GM406889139.pdfIn PDF document text
    • https://lesegais.ru/images/hack-coin-master-apk-2021_GM406889139.pdfIn PDF document text
    • https://lesegais.ru/images/how-to-get-free-snacks-in-coin-master_GM406889139.pdfIn PDF document text
    • https://lesegais.ru/images/how-to-get-minecraft-windows-10-for-free-2021_GM479516143.pdfIn PDF document text
    • https://lesegais.ru/images/coin-master-hack-2021-without-human-verification_GM406889139.pdfIn PDF document text
    • https://lesegais.ru/images/coin-master-mod-version-free-download-v344_GM406889139.pdfIn PDF document text
    • https://lesegais.ru/images/robux-miner_GM431946152.pdfIn PDF document text
    • https://lesegais.ru/images/free-robux-safe_GM431946152.pdfIn PDF document text
    • https://lesegais.ru/images/coin-master-hack-version-33-2_GM406889139.pdfIn PDF document text
    • https://lesegais.ru/images/free-robux-no-offers_GM431946152.pdfIn PDF document text
    • https://lesegais.ru/images/roblox36com-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
stream_003_off00004756.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4756 26992 bytes
SHA-256: b1f17f2f5452981207d2683892074df6c153a288cc6c7bccd98fc7d55ec85733
font_01_sfnt_off0000858f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x858F 18468 bytes
SHA-256: d7aeb26289e2269d4bb478c8c95e02d02e09ec61abdc4523be76647d936bf4f1

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