Malicious PDF — malware analysis report

Static analysis result for SHA-256 ff9e4743093c8389…

MALICIOUS

PDF

35.5 KB Created: 2021-06-26 00:46:34 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 3b1e4419274f365476916e1e58f9bbae SHA-1: 48820dfb750146b36c71d7c21a3cdd029995e61b SHA-256: ff9e4743093c8389fda543a2cd72d110d07ddef60d23eb544663eaf3f114522d
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.co/app/431946152/how-to-get-free-diamonds-in-roblox-royale-high-game-hack PDF link annotation
    • http://www.6636.com.tw/ad6636/upload/files/how-to-get-minecraft-for-free-on-xbox_GM479516143.pdfIn PDF document text
    • http://www.6636.com.tw/ad6636/upload/files/coin-master-heaven-free-spins_GM406889139.pdfIn PDF document text
    • http://www.6636.com.tw/ad6636/upload/files/how-to-buy-robux-for-free_GM431946152.pdfIn PDF document text
    • http://www.6636.com.tw/ad6636/upload/files/roblox-cheat-engine-hacks-2021_GM431946152.pdfIn PDF document text
    • http://www.6636.com.tw/ad6636/upload/files/coin-master-free-daily-spins-and-coins_GM406889139.pdfIn PDF document text
    • http://www.6636.com.tw/ad6636/upload/files/free-google-play-promo-codes-coin-master_GM406889139.pdfIn PDF document text
    • http://www.6636.com.tw/ad6636/upload/files/minecraft-hack-client-download_GM479516143.pdfIn PDF document text
    • http://www.6636.com.tw/ad6636/upload/files/is-tiktok-free-app_GM835599320.pdfIn PDF document text
    • http://www.6636.com.tw/ad6636/upload/files/free-robux-hack-generator_GM431946152.pdfIn PDF document text
    • http://www.6636.com.tw/ad6636/upload/files/free-robux-codes-generator_GM431946152.pdfIn PDF document text
    • http://www.6636.com.tw/ad6636/upload/files/hack-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://www.6636.com.tw/ad6636/upload/files/free-robux-come_GM431946152.pdfIn PDF document text
    • http://www.6636.com.tw/ad6636/upload/files/coinmaster-links_GM406889139.pdfIn PDF document text
    • http://www.6636.com.tw/ad6636/upload/files/robux-win_GM431946152.pdfIn PDF document text
    • http://www.6636.com.tw/ad6636/upload/files/e-free-in-roblox_GM431946152.pdfIn PDF document text
    • http://www.6636.com.tw/ad6636/upload/files/free-robux-generatore_GM431946152.pdfIn PDF document text
    • http://www.6636.com.tw/ad6636/upload/files/if-you-delete-minecraft-can-you-redownload-it-for-free_GM479516143.pdfIn PDF document text
    • http://www.6636.com.tw/ad6636/upload/files/free-minecraft-games-for-kids_GM479516143.pdfIn PDF document text
    • http://www.6636.com.tw/ad6636/upload/files/raspberry-roblox-hack_GM431946152.pdfIn PDF document text
    • http://www.6636.com.tw/ad6636/upload/files/coin-master-hack-2021-no-survey_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_off000030d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x30D8 22548 bytes
SHA-256: 015517c8cc884494eb72137e051ccbeb31d711f831c4e356dc4aa179d1e4fdaa
font_01_sfnt_off000062f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x62F5 19988 bytes
SHA-256: 1e935fce51ee00a93873f5e0d3a83736a61a65b3769c978d96108975946bfac5

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