Malicious PDF — malware analysis report

Static analysis result for SHA-256 45e5729008508de0…

MALICIOUS

PDF

33.8 KB Created: 2021-07-03 20:08:46 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01
MD5: ab057fec1b899bae7508f211847b6440 SHA-1: 863984c318c1cdde0056c7b671709af1cb9ea1a5 SHA-256: 45e5729008508de0c36efb97ac04a69ffed9c6ae9245435022d7de721966d151
122 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. It uses a fake-CAPTCHA lure. 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 5

  • 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.
  • Fake CAPTCHA / human verification prompt high SE_FAKE_CAPTCHA
    Document displays a fake CAPTCHA or human-verification prompt — used to trick users into running commands or pressing keyboard shortcuts
  • 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/real-roblox-game-hack PDF link annotation
    • https://lib.bunghatta.ac.id/app/repository/coin-master-free-spin-and-coin_GM406889139.pdfIn PDF document text
    • https://lib.bunghatta.ac.id/app/repository/script-for-have-gamepass-free-roblox-pastebin_GM431946152.pdfIn PDF document text
    • https://lib.bunghatta.ac.id/app/repository/roblox-dragon-ball-rage-hack-2021_GM431946152.pdfIn PDF document text
    • https://lib.bunghatta.ac.id/app/repository/coin-master-free-coins-and-spins-blogspot_GM406889139.pdfIn PDF document text
    • https://lib.bunghatta.ac.id/app/repository/free-roblox-valentines-cards_GM431946152.pdfIn PDF document text
    • https://lib.bunghatta.ac.id/app/repository/free-robux-python-code-2021_GM431946152.pdfIn PDF document text
    • https://lib.bunghatta.ac.id/app/repository/minecraft-bedrock-download-pc-free_GM479516143.pdfIn PDF document text
    • https://lib.bunghatta.ac.id/app/repository/how-to-hack-piano-in-roblox_GM431946152.pdfIn PDF document text
    • https://lib.bunghatta.ac.id/app/repository/free-build-games-roblox_GM431946152.pdfIn PDF document text
    • https://lib.bunghatta.ac.id/app/repository/how-to-hack-a-roblox-account-easy_GM431946152.pdfIn PDF document text
    • https://lib.bunghatta.ac.id/app/repository/free-robux-no-survey-no-download-2021_GM431946152.pdfIn PDF document text
    • https://lib.bunghatta.ac.id/app/repository/free-robux-generator-download-2021_GM431946152.pdfIn PDF document text
    • https://lib.bunghatta.ac.id/app/repository/real-robux-hack-no-survey-2021-february_GM431946152.pdfIn PDF document text
    • https://lib.bunghatta.ac.id/app/repository/mcpe-master-hack-unlimited-coins-download_GM406889139.pdfIn PDF document text
    • https://lib.bunghatta.ac.id/app/repository/free-simply-go-to-robuxconz-redeem_GM431946152.pdfIn PDF document text
    • https://lib.bunghatta.ac.id/app/repository/how-to-win-attack-madness-in-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://lib.bunghatta.ac.id/app/repository/best-free-robux-sites_GM431946152.pdfIn PDF document text
    • https://lib.bunghatta.ac.id/app/repository/how-to-hack-into-anyones-roblox-account-2021-june_GM431946152.pdfIn PDF document text
    • https://lib.bunghatta.ac.id/app/repository/who-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://lib.bunghatta.ac.id/app/repository/free-roblox-robux-accounts_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_off0000309a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x309A 21788 bytes
SHA-256: e004dd5d6fde79a52f5b88b1c6c65dfd8838628d94259a37ea5e57b9bc88e084
font_01_sfnt_off0000608a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x608A 18484 bytes
SHA-256: 7f0f55fb7efe68b4890159f191db407b63f8f65986d021ee8cd072538b6ccf6b

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