Malicious PDF — malware analysis report

Static analysis result for SHA-256 e108745d2a473f07…

MALICIOUS

PDF

32.9 KB Created: 2021-06-29 17:45:33 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-18
MD5: edc0ff26901ad6614859092ca9319c96 SHA-1: 3763be0cbdcd9a775c96700bb916961c94c15fb7 SHA-256: e108745d2a473f0707dc034694e0bdee4396e5d24ba9fecfe56f024fc4bc1382
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-bis-game-hack PDF link annotation
    • https://edu.kyst.com.tw/image/data/files/coin-master-hack-coins_GM406889139.pdfIn PDF document text
    • https://edu.kyst.com.tw/image/data/files/free-spins-on-coin-master-game_GM406889139.pdfIn PDF document text
    • https://edu.kyst.com.tw/image/data/files/minecraft-java-edition-free-code_GM479516143.pdfIn PDF document text
    • https://edu.kyst.com.tw/image/data/files/free-robux-2021_GM431946152.pdfIn PDF document text
    • https://edu.kyst.com.tw/image/data/files/how-to-get-free-robux-without-human-verification-on-computer_GM431946152.pdfIn PDF document text
    • https://edu.kyst.com.tw/image/data/files/master-coin-free-spin_GM406889139.pdfIn PDF document text
    • https://edu.kyst.com.tw/image/data/files/coin-master-card-collection-hack-apk_GM406889139.pdfIn PDF document text
    • https://edu.kyst.com.tw/image/data/files/coin-master-daily-free-spins-blogspot_GM406889139.pdfIn PDF document text
    • https://edu.kyst.com.tw/image/data/files/hack-roblox-void_GM431946152.pdfIn PDF document text
    • https://edu.kyst.com.tw/image/data/files/roblox-games-with-free-vip-servers_GM431946152.pdfIn PDF document text
    • https://edu.kyst.com.tw/image/data/files/roblox-hack-site_GM431946152.pdfIn PDF document text
    • https://edu.kyst.com.tw/image/data/files/free-roblox-hack_GM431946152.pdfIn PDF document text
    • https://edu.kyst.com.tw/image/data/files/free-apk-mods-coin-master_GM406889139.pdfIn PDF document text
    • https://edu.kyst.com.tw/image/data/files/hack-into-people-roblox-account-pastebin_GM431946152.pdfIn PDF document text
    • https://edu.kyst.com.tw/image/data/files/jailbreak-hacks-for-roblox-projec-alph_GM431946152.pdfIn PDF document text
    • https://edu.kyst.com.tw/image/data/files/coin-master-free-spins-2021_GM406889139.pdfIn PDF document text
    • https://edu.kyst.com.tw/image/data/files/coin-master-daily-free-spins-link-today-haktuts_GM406889139.pdfIn PDF document text
    • https://edu.kyst.com.tw/image/data/files/how-to-use-cheat-engine-64-on-roblox-2021_GM431946152.pdfIn PDF document text
    • https://edu.kyst.com.tw/image/data/files/how-do-u-get-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
font_00_sfnt_off00002ab0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2AB0 22388 bytes
SHA-256: b924c864d9de48301c5c0190ca5e9b96fc806d03f4bec67f1dc276cba9cb57ab
font_01_sfnt_off00005cad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5CAD 18836 bytes
SHA-256: 9586fbbb13813900bd8bb17e07ea12635993d80bc3218cb7fb40c131eaac90fd

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