Malicious PDF — malware analysis report

Static analysis result for SHA-256 4acbaa452e3f2eb0…

MALICIOUS

PDF

51.3 KB Created: 2021-06-07 19:26:33 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-02
MD5: f89182af80c9be3d133ab40f58837800 SHA-1: 787094c6eb5c232caec6d8cba459fe5c8e06b45e SHA-256: 4acbaa452e3f2eb0fca603eac0f6cc6f98dd16c75e551ba67be953418d029f89
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 0.9724

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.tw/app/431946152/getting-hacked-on-roblox-prank-game-hack PDF link annotation
    • http://www.kraftyzone.com/uploaded_files/userfiles/files/wwwcoin-master-hack-apk_GM406889139.pdfIn PDF document text
    • http://www.kraftyzone.com/uploaded_files/userfiles/files/free-spins-coin-master-app_GM406889139.pdfIn PDF document text
    • http://www.kraftyzone.com/uploaded_files/userfiles/files/how-to-get-free-coins-on-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://www.kraftyzone.com/uploaded_files/userfiles/files/tiktok-free-download-2021_GM835599320.pdfIn PDF document text
    • http://www.kraftyzone.com/uploaded_files/userfiles/files/free-robux-no-human-verification-generator_GM431946152.pdfIn PDF document text
    • http://www.kraftyzone.com/uploaded_files/userfiles/files/i-want-robux_GM431946152.pdfIn PDF document text
    • http://www.kraftyzone.com/uploaded_files/userfiles/files/coin-master-free-coins-and-spins-link_GM406889139.pdfIn PDF document text
    • http://www.kraftyzone.com/uploaded_files/userfiles/files/how-to-get-free-robux-no-scam_GM431946152.pdfIn PDF document text
    • http://www.kraftyzone.com/uploaded_files/userfiles/files/coin-master-free-daily-spins-today_GM406889139.pdfIn PDF document text
    • http://www.kraftyzone.com/uploaded_files/userfiles/files/free-robux-codes-2021_GM431946152.pdfIn PDF document text
    • http://www.kraftyzone.com/uploaded_files/userfiles/files/tiktok-free-view-editor_GM835599320.pdfIn PDF document text
    • http://www.kraftyzone.com/uploaded_files/userfiles/files/how-to-make-a-free-minecraft-account_GM479516143.pdfIn PDF document text
    • http://www.kraftyzone.com/uploaded_files/userfiles/files/robloxheroxyz-free-robux_GM431946152.pdfIn PDF document text
    • http://www.kraftyzone.com/uploaded_files/userfiles/files/teach-me-to-hack_GM431946152.pdfIn PDF document text
    • http://www.kraftyzone.com/uploaded_files/userfiles/files/free-robux-hack-us_GM431946152.pdfIn PDF document text
    • http://www.kraftyzone.com/uploaded_files/userfiles/files/hack-roblox-players_GM431946152.pdfIn PDF document text
    • http://www.kraftyzone.com/uploaded_files/userfiles/files/free-robux-meme_GM431946152.pdfIn PDF document text
    • http://www.kraftyzone.com/uploaded_files/userfiles/files/how-to-get-free-spins-on-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://www.kraftyzone.com/uploaded_files/userfiles/files/100-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://www.kraftyzone.com/uploaded_files/userfiles/files/free-robux-images_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00005177.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5177 32224 bytes
SHA-256: 4a0995f8240bb791c67969169b84f5bc15e08d71c5fcfb19fe7ea09d8bb9bda8
font_01_sfnt_off0000995a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x995A 3016 bytes
SHA-256: 4c3e2db5174821787a4569c9da4979555510caebd15fb9cea35573c139e242bd
font_02_sfnt_off0000a3bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA3BD 19020 bytes
SHA-256: 55d682c6837cfbbdd815ffa1c64767c3284216a264d2d5be564cb511e2ea7948

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