Malicious PDF — malware analysis report

Static analysis result for SHA-256 8f68d0d0004193ab…

MALICIOUS

PDF

34.4 KB Created: 2021-07-03 12:41:28 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 800475b10f53716fd926f28efb57e2b0 SHA-1: 18430f70ce28299ee71b45cfb019aa07b27f71d4 SHA-256: 8f68d0d0004193ab755086c32c2245f624cd7ef75ccacba4698205a2efd06773
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 0.9980

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.tw/app/431946152/free-robux-survey-game-hack PDF link annotation
    • https://esl.hess.com.tw/image/data/files/how-to-get-free-robux-without-doing-anything_GM431946152.pdfIn PDF document text
    • https://esl.hess.com.tw/image/data/files/free-robux-generator-no-verification-2021_GM431946152.pdfIn PDF document text
    • https://esl.hess.com.tw/image/data/files/synapse-roblox-free_GM431946152.pdfIn PDF document text
    • https://esl.hess.com.tw/image/data/files/free-spins-october-28-2021-coin-master_GM406889139.pdfIn PDF document text
    • https://esl.hess.com.tw/image/data/files/minecraft-net-free_GM479516143.pdfIn PDF document text
    • https://esl.hess.com.tw/image/data/files/minecraft-for-ipad-free_GM479516143.pdfIn PDF document text
    • https://esl.hess.com.tw/image/data/files/how-do-you-hack-minecraft_GM479516143.pdfIn PDF document text
    • https://esl.hess.com.tw/image/data/files/free-account-roblox-with-robux_GM431946152.pdfIn PDF document text
    • https://esl.hess.com.tw/image/data/files/free-1-000-robux_GM431946152.pdfIn PDF document text
    • https://esl.hess.com.tw/image/data/files/best-minecraft-hacked-client_GM479516143.pdfIn PDF document text
    • https://esl.hess.com.tw/image/data/files/como-hackear-coin-master-ios_GM406889139.pdfIn PDF document text
    • https://esl.hess.com.tw/image/data/files/roblox-free-remdem-codes_GM431946152.pdfIn PDF document text
    • https://esl.hess.com.tw/image/data/files/free-spins-coin-master-2021-app_GM406889139.pdfIn PDF document text
    • https://esl.hess.com.tw/image/data/files/free-robux-2021-no-verification_GM431946152.pdfIn PDF document text
    • https://esl.hess.com.tw/image/data/files/free-robux-codes-2021_GM431946152.pdfIn PDF document text
    • https://esl.hess.com.tw/image/data/files/coin-master-free-spins-only_GM406889139.pdfIn PDF document text
    • https://esl.hess.com.tw/image/data/files/coin-master-village-4_GM406889139.pdfIn PDF document text
    • https://esl.hess.com.tw/image/data/files/coin-master-free-spins-link-blogspot-today_GM406889139.pdfIn PDF document text
    • https://esl.hess.com.tw/image/data/files/barnes-roblox-destruction-simulator-where-everything-is-free_GM431946152.pdfIn PDF document text
    • https://esl.hess.com.tw/image/data/files/can-i-play-roblox-for-free_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_off0000308d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x308D 21980 bytes
SHA-256: 8f58b88930a72bc10e4d31eb11decf7b7cde7e836e6a7ff38a13c73dcacf5021
font_01_sfnt_off00006148.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6148 19012 bytes
SHA-256: c0541a5d6200ab17734b4952abc6c0a8b533a715d99044a6ee13c1a52db76e39

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