Malicious PDF — malware analysis report

Static analysis result for SHA-256 5ac2b0d802f9678c…

MALICIOUS

PDF

42.2 KB Created: 2021-05-16 01:00:46 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: f7cb5644cf66ccb66171010e5eb35c6e SHA-1: c16c36101ad403625d97f9b8462bee729b464ca2 SHA-256: 5ac2b0d802f9678cdf6fdd8ccf18b9b41d0947acbe239539b1dd41a896405a32
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/406889139/coin-master-hack-download-game-hack PDF link annotation
    • http://www.mucinvitinh.vn/public/images/image_uploads/files/coin-master-free-spins-today-daily-links_GM406889139.pdfIn PDF document text
    • http://www.mucinvitinh.vn/public/images/image_uploads/files/minecraft-pocket-edition-mods-for-free_GM479516143.pdfIn PDF document text
    • http://www.mucinvitinh.vn/public/images/image_uploads/files/best-minecraft-hacks_GM479516143.pdfIn PDF document text
    • http://www.mucinvitinh.vn/public/images/image_uploads/files/blox-world-free-robux_GM431946152.pdfIn PDF document text
    • http://www.mucinvitinh.vn/public/images/image_uploads/files/how-to-get-free-robux-without-verification_GM431946152.pdfIn PDF document text
    • http://www.mucinvitinh.vn/public/images/image_uploads/files/robux-apk_GM431946152.pdfIn PDF document text
    • http://www.mucinvitinh.vn/public/images/image_uploads/files/android-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://www.mucinvitinh.vn/public/images/image_uploads/files/coin-master-free-spins-facebook_GM406889139.pdfIn PDF document text
    • http://www.mucinvitinh.vn/public/images/image_uploads/files/get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://www.mucinvitinh.vn/public/images/image_uploads/files/how-to-get-free-robux-by-playing-games_GM431946152.pdfIn PDF document text
    • http://www.mucinvitinh.vn/public/images/image_uploads/files/free-robux-hack-no-verification_GM431946152.pdfIn PDF document text
    • http://www.mucinvitinh.vn/public/images/image_uploads/files/how-to-get-free-robux-2021-easy_GM431946152.pdfIn PDF document text
    • http://www.mucinvitinh.vn/public/images/image_uploads/files/coin-master-free-pet-snacks_GM406889139.pdfIn PDF document text
    • http://www.mucinvitinh.vn/public/images/image_uploads/files/free-roblox-avatar-ideas_GM431946152.pdfIn PDF document text
    • http://www.mucinvitinh.vn/public/images/image_uploads/files/blox-supply-free-robux_GM431946152.pdfIn PDF document text
    • http://www.mucinvitinh.vn/public/images/image_uploads/files/10-robux_GM431946152.pdfIn PDF document text
    • http://www.mucinvitinh.vn/public/images/image_uploads/files/free-spin-links-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://www.mucinvitinh.vn/public/images/image_uploads/files/coin-master-mod-apk-free-download_GM406889139.pdfIn PDF document text
    • http://www.mucinvitinh.vn/public/images/image_uploads/files/daily-free-spin-link-in-coin-master_GM406889139.pdfIn PDF document text
    • http://www.mucinvitinh.vn/public/images/image_uploads/files/today-coin-master-free-coins-link_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
stream_003_off00004baf.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4BAF 23956 bytes
SHA-256: 313fb71bb42f02dbfd7b5a4abb7d60efbfca323ffa788afa69cc296eda2bebb6
font_01_sfnt_off00008251.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8251 18296 bytes
SHA-256: db56d9e3c11ec37843eb343cebe3e770d4a138f0c9ee08e97c7bb5af64d66a72

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