Malicious PDF — malware analysis report

Static analysis result for SHA-256 d9f09c91e94d3cec…

MALICIOUS

PDF

41.4 KB Created: 2021-05-19 12:38:01 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: a22ced2257eb962114d2da783aa5c608 SHA-1: b665c75c3102700f6bfd026ad9b1d25f8fd3bcc6 SHA-256: d9f09c91e94d3cec28defaecc626e55dea914d0e6102ef184490ff53b0742933
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 0.9971

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 https://netcdn.xyz/app/431946152/roblox-script-hacks-game-hack PDF link annotation
    • https://tnupacktour.com.tw/image/data/files/free-coins-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://tnupacktour.com.tw/image/data/files/free-spin-online-tool-coin-master_GM406889139.pdfIn PDF document text
    • https://tnupacktour.com.tw/image/data/files/robuxmatchcon_GM431946152.pdfIn PDF document text
    • https://tnupacktour.com.tw/image/data/files/free-robux-no-scam_GM431946152.pdfIn PDF document text
    • https://tnupacktour.com.tw/image/data/files/coin-master-free-spins-and-coins-2021_GM406889139.pdfIn PDF document text
    • https://tnupacktour.com.tw/image/data/files/coin-master-free-spins-app-for-iphone_GM406889139.pdfIn PDF document text
    • https://tnupacktour.com.tw/image/data/files/coin-master-daily-free-spins-link-today-blogspot_GM406889139.pdfIn PDF document text
    • https://tnupacktour.com.tw/image/data/files/coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • https://tnupacktour.com.tw/image/data/files/coin-master-time-hack-2021_GM406889139.pdfIn PDF document text
    • https://tnupacktour.com.tw/image/data/files/get-free-robux-generator_GM431946152.pdfIn PDF document text
    • https://tnupacktour.com.tw/image/data/files/how-to-get-free-robux-youtube_GM431946152.pdfIn PDF document text
    • https://tnupacktour.com.tw/image/data/files/oprewards-free-robux_GM431946152.pdfIn PDF document text
    • https://tnupacktour.com.tw/image/data/files/coin-master-how-to-get-japan-sushi-card-free_GM406889139.pdfIn PDF document text
    • https://tnupacktour.com.tw/image/data/files/tiktok-free-fans-video_GM835599320.pdfIn PDF document text
    • https://tnupacktour.com.tw/image/data/files/robux-com-free-robux_GM431946152.pdfIn PDF document text
    • https://tnupacktour.com.tw/image/data/files/real-free-robux-generator_GM431946152.pdfIn PDF document text
    • https://tnupacktour.com.tw/image/data/files/claim-gg-free-robux_GM431946152.pdfIn PDF document text
    • https://tnupacktour.com.tw/image/data/files/all-coin-master-spin-link-and-free-download_GM406889139.pdfIn PDF document text
    • https://tnupacktour.com.tw/image/data/files/easiest-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://tnupacktour.com.tw/image/data/files/get-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_off00004610.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4610 25304 bytes
SHA-256: 5cc7c9ce2ae02ae26c7908cba19f5243473c46e25f3f55e79599c5bb942095f7
font_01_sfnt_off00007e77.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7E77 18580 bytes
SHA-256: 535ec4be0d2657e9981f9200dcc4c4c41f6589372ce54f218017d5d6a2e1f0f5

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