Malicious PDF — malware analysis report

Static analysis result for SHA-256 d3089627c5453b00…

MALICIOUS

PDF

33.0 KB Created: 2021-06-26 15:42:34 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 2ffae58b8f1940230350a30bf34d597e SHA-1: ab8f68789aef4f67364637852b5a5c5b6e7f7373 SHA-256: d3089627c5453b00ca94b2648e6d9223c7ba42b5b44adc7a4f89b2253712200f
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. The file routes users through malicious redirector infrastructure and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9824

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector high 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.
  • 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
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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/free-robux-2021-en-game-hack PDF link annotation
    • https://edu.kyst.com.tw/image/data/files/claim-roblox_GM431946152.pdfIn PDF document text
    • https://edu.kyst.com.tw/image/data/files/free-robux-generator-no-survey-no-download-no-human-verification_GM431946152.pdfIn PDF document text
    • https://edu.kyst.com.tw/image/data/files/easy-ways-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://edu.kyst.com.tw/image/data/files/how-to-get-free-robux-on-chromebook_GM431946152.pdfIn PDF document text
    • https://edu.kyst.com.tw/image/data/files/free-robux-no-human-verification-or-survey-or-download_GM431946152.pdfIn PDF document text
    • https://edu.kyst.com.tw/image/data/files/how-to-hack-to-get-robux_GM431946152.pdfIn PDF document text
    • https://edu.kyst.com.tw/image/data/files/free-robux-obby_GM431946152.pdfIn PDF document text
    • https://edu.kyst.com.tw/image/data/files/minecraft-servers-that-allow-hacks_GM479516143.pdfIn PDF document text
    • https://edu.kyst.com.tw/image/data/files/coin-master-free-spin-and-coin_GM406889139.pdfIn PDF document text
    • https://edu.kyst.com.tw/image/data/files/coin-master-hack-2021-link_GM406889139.pdfIn PDF document text
    • https://edu.kyst.com.tw/image/data/files/robux-offers_GM431946152.pdfIn PDF document text
    • https://edu.kyst.com.tw/image/data/files/minecraft-windows-10-edition-hacks_GM479516143.pdfIn PDF document text
    • https://edu.kyst.com.tw/image/data/files/free-daily-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://edu.kyst.com.tw/image/data/files/hack-coin-master-no-verification_GM406889139.pdfIn PDF document text
    • https://edu.kyst.com.tw/image/data/files/www-robux-redeem_GM431946152.pdfIn PDF document text
    • https://edu.kyst.com.tw/image/data/files/roblox-free-clothes-girl_GM431946152.pdfIn PDF document text
    • https://edu.kyst.com.tw/image/data/files/robux-gainer_GM431946152.pdfIn PDF document text
    • https://edu.kyst.com.tw/image/data/files/free-minecraft-premium-account_GM479516143.pdfIn PDF document text
    • https://edu.kyst.com.tw/image/data/files/how-to-get-free-obc-on-roblox-ios_GM431946152.pdfIn PDF document text
    • https://edu.kyst.com.tw/image/data/files/advertizes-for-free-robux_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 7

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002a1c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2A1C 22276 bytes
SHA-256: 2b5e4f997f58ffe647270f36da5ebb633573dfa64737946c4ae73025de372514
font_01_sfnt_off00005be0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5BE0 19116 bytes
SHA-256: b0a356def7dd80e5c45f643bcd62da1d5e7035c198aba45391562fa79c85b150

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