Malicious PDF — malware analysis report

Static analysis result for SHA-256 1f23f4c3acee9fca…

MALICIOUS

PDF

33.9 KB Created: 2021-07-10 03:12:13 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: d71344dc99a33677330f710f2333603a SHA-1: 14969f2c45de31eb9fde6723f7f3588d9441b93f SHA-256: 1f23f4c3acee9fcaed69a3edbb42b7f9e0b5888886798d913bd56427c43360a8
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/406889139/best-free-spin-app-for-coin-master-game-hack PDF link annotation
    • https://ourlady-elearning.com/userfiles/files/freer-pro-tiktok-fans_GM835599320.pdfIn PDF document text
    • https://ourlady-elearning.com/userfiles/files/robux-hack-no-verification-needed_GM431946152.pdfIn PDF document text
    • https://ourlady-elearning.com/userfiles/files/free-robux-deals_GM431946152.pdfIn PDF document text
    • https://ourlady-elearning.com/userfiles/files/coin-master-hack-without-verification-code_GM406889139.pdfIn PDF document text
    • https://ourlady-elearning.com/userfiles/files/free-unlimited-robux_GM431946152.pdfIn PDF document text
    • https://ourlady-elearning.com/userfiles/files/how-to-play-roblox-for-free_GM431946152.pdfIn PDF document text
    • https://ourlady-elearning.com/userfiles/files/how-to-get-free-robux-no-scam_GM431946152.pdfIn PDF document text
    • https://ourlady-elearning.com/userfiles/files/tiktok-followers-for-free_GM835599320.pdfIn PDF document text
    • https://ourlady-elearning.com/userfiles/files/minecraft-marketplace-free_GM479516143.pdfIn PDF document text
    • https://ourlady-elearning.com/userfiles/files/free-robux-clothes_GM431946152.pdfIn PDF document text
    • https://ourlady-elearning.com/userfiles/files/roblox-catalog-hacks_GM431946152.pdfIn PDF document text
    • https://ourlady-elearning.com/userfiles/files/links-for-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • https://ourlady-elearning.com/userfiles/files/buy-hacks-for-roblox_GM431946152.pdfIn PDF document text
    • https://ourlady-elearning.com/userfiles/files/www-roblox-com-robux-free_GM431946152.pdfIn PDF document text
    • https://ourlady-elearning.com/userfiles/files/who-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://ourlady-elearning.com/userfiles/files/get-free-roblox_GM431946152.pdfIn PDF document text
    • https://ourlady-elearning.com/userfiles/files/free-robux-live_GM431946152.pdfIn PDF document text
    • https://ourlady-elearning.com/userfiles/files/how-to-get-minecraft-java-for-free_GM479516143.pdfIn PDF document text
    • https://ourlady-elearning.com/userfiles/files/coin-master-daily-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • https://ourlady-elearning.com/userfiles/files/coin-master-free-spin-and-coins-links-2021_GM406889139.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_off0000303d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x303D 22204 bytes
SHA-256: 41cde6398dceacebb33f3560f15e2f886400a831293927202faa3c8422ac11a0
font_01_sfnt_off00006181.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6181 18388 bytes
SHA-256: aeda58ff5a32b49ec09e40af11fd05ed5a2d12f2d07600bfa5490f3031411085

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