Malicious PDF — malware analysis report

Static analysis result for SHA-256 851af0ba01df712b…

MALICIOUS

PDF

35.1 KB Created: 2021-07-04 04:19:02 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 0e4b6cc74b531826b1af5aee83cea5a4 SHA-1: 851682d74000d46999b6a65c96f6101385461c7c SHA-256: 851af0ba01df712bcc2a98a71b7a1dde37a00e3b6aaccc8a69e231d2b5de2183
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains lures for game hacks and free currency, directing users to the URL http://netcdn.tw/app/406889139/how-to-legally-get-free-spins-in-coin-master-game-hack. This URL is likely part of a phishing or malware distribution chain. The ML classifier also strongly indicated maliciousness.

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/how-to-legally-get-free-spins-in-coin-master-game-hack PDF link annotation
    • https://elearningmtsn1tanggamus.sch.id/__statics/gudangsoal/files/mcpe-master-hack-coins_GM406889139.pdfIn PDF document text
    • https://www.elearningmtsn1tanggamus.sch.id/__statics/gudangsoal/files/roblox-video-games-for-free_GM431946152.pdfIn PDF document text
    • https://www.elearningmtsn1tanggamus.sch.id/__statics/gudangsoal/files/coin-master-hack-pro-gamers_GM406889139.pdfIn PDF document text
    • https://www.elearningmtsn1tanggamus.sch.id/__statics/gudangsoal/files/roblox-hack-game_GM431946152.pdfIn PDF document text
    • https://www.elearningmtsn1tanggamus.sch.id/__statics/gudangsoal/files/pokemon-go-for-free-download_GM1094591345.pdfIn PDF document text
    • https://www.elearningmtsn1tanggamus.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-in-2021_GM431946152.pdfIn PDF document text
    • https://www.elearningmtsn1tanggamus.sch.id/__statics/gudangsoal/files/minecraft-free-minecoins_GM479516143.pdfIn PDF document text
    • https://elearningmtsn1tanggamus.sch.id/__statics/gudangsoal/files/free-robux-no-human-verification-and-no-survey_GM431946152.pdfIn PDF document text
    • https://www.elearningmtsn1tanggamus.sch.id/__statics/gudangsoal/files/coin-master-hack-without-human-verification-2021_GM406889139.pdfIn PDF document text
    • https://www.elearningmtsn1tanggamus.sch.id/__statics/gudangsoal/files/free-robux-no-download_GM431946152.pdfIn PDF document text
    • https://elearningmtsn1tanggamus.sch.id/__statics/gudangsoal/files/coinmaster-spin-ml_GM406889139.pdfIn PDF document text
    • https://elearningmtsn1tanggamus.sch.id/__statics/gudangsoal/files/get-me-free-robux_GM431946152.pdfIn PDF document text
    • https://elearningmtsn1tanggamus.sch.id/__statics/gudangsoal/files/robux-download_GM431946152.pdfIn PDF document text
    • https://elearningmtsn1tanggamus.sch.id/__statics/gudangsoal/files/roblox-generator_GM431946152.pdfIn PDF document text
    • https://elearningmtsn1tanggamus.sch.id/__statics/gudangsoal/files/easy-robux-hack_GM431946152.pdfIn PDF document text
    • https://elearningmtsn1tanggamus.sch.id/__statics/gudangsoal/files/free-roblox-animation-script_GM431946152.pdfIn PDF document text
    • https://www.elearningmtsn1tanggamus.sch.id/__statics/gudangsoal/files/how-to-make-clothes-on-roblox-for-free_GM431946152.pdfIn PDF document text
    • https://www.elearningmtsn1tanggamus.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-on-roblox-tablet_GM431946152.pdfIn PDF document text
    • https://elearningmtsn1tanggamus.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-fast-and-easy_GM431946152.pdfIn PDF document text
    • https://www.elearningmtsn1tanggamus.sch.id/__statics/gudangsoal/files/coin-master-heaven-free-spins_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_off00003286.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3286 22872 bytes
SHA-256: 00293405bbd5cf345135957458380821a91d9220321eb5e6750c5691e74015a5
font_01_sfnt_off00006592.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6592 18592 bytes
SHA-256: 534d446c9b588d963fa4df8185f91cfceb8168b0f734f13f841fe58b6b88bcd4

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