Malicious PDF — malware analysis report

Static analysis result for SHA-256 3c5d6030fa434944…

MALICIOUS

PDF

35.9 KB Created: 2021-07-09 00:05:47 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01
MD5: bb3ff3df8dda2808e9aa8a16c3de21dd SHA-1: 9eb9ca16e5fa8b0cf15a64346176cfff5367e077 SHA-256: 3c5d6030fa4349444d65adf8147e6c31886cefb6d2a4f9c1dbc76bca4fc830fe
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.tw/app/431946152/free-roblox-dominus-game-hack PDF link annotation
    • https://smark.com.tw/image/data/files/how-to-setup-a-minecraft-server-for-free_GM479516143.pdfIn PDF document text
    • https://smark.com.tw/image/data/files/coin-master-game-free-download-for-pc_GM406889139.pdfIn PDF document text
    • https://smark.com.tw/image/data/files/2021-free-coin-master-spins_GM406889139.pdfIn PDF document text
    • https://smark.com.tw/image/data/files/free-robux-on-ipad_GM431946152.pdfIn PDF document text
    • https://smark.com.tw/image/data/files/coin-master-hack-apk-2021-download_GM406889139.pdfIn PDF document text
    • https://smark.com.tw/image/data/files/roblox-arsenal-hacks-download_GM431946152.pdfIn PDF document text
    • https://smark.com.tw/image/data/files/get-free-robux-gg_GM431946152.pdfIn PDF document text
    • https://smark.com.tw/image/data/files/archery-master-3d-apk-and-mod-free-download-unlimited-coins_GM406889139.pdfIn PDF document text
    • https://smark.com.tw/image/data/files/is-there-any-tricks-or-working-hacks-for-coin-master_GM406889139.pdfIn PDF document text
    • https://smark.com.tw/image/data/files/roblox-free-pet-scam_GM431946152.pdfIn PDF document text
    • https://smark.com.tw/image/data/files/roblox-arsenal-hack-script_GM431946152.pdfIn PDF document text
    • https://smark.com.tw/image/data/files/robux-generator-no-human-verification-or-survey_GM431946152.pdfIn PDF document text
    • https://smark.com.tw/image/data/files/roblox-free-teleporter_GM431946152.pdfIn PDF document text
    • https://smark.com.tw/image/data/files/skimas-roblox-hack_GM431946152.pdfIn PDF document text
    • https://smark.com.tw/image/data/files/horizon-alpha-money-hack-may-2021-roblox_GM431946152.pdfIn PDF document text
    • https://smark.com.tw/image/data/files/coin-master-free-spins-moonactive_GM406889139.pdfIn PDF document text
    • https://smark.com.tw/image/data/files/master-free-spin_GM406889139.pdfIn PDF document text
    • https://smark.com.tw/image/data/files/robux-gift-card-free_GM431946152.pdfIn PDF document text
    • https://smark.com.tw/image/data/files/how-to-get-free-robux-no-survey_GM431946152.pdfIn PDF document text
    • https://smark.com.tw/image/data/files/coin-master-free-spins-today-daily-links_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_off000033f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x33F4 22612 bytes
SHA-256: b8eef2621305a26d55018e808ba3eaff500295000576d7f97fec6462ee7f2d34
font_01_sfnt_off0000669e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x669E 19340 bytes
SHA-256: 59b512dc90008f14457b85b901a0dc6ea5b5041a5824ff86a8869534b615d886

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