Malicious PDF — malware analysis report

Static analysis result for SHA-256 800f5ac64ee60d5d…

MALICIOUS

PDF

45.1 KB Created: 2021-06-09 16:44:00 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 19165f850016f9f7b09f1e974381233d SHA-1: a99e793886790f17c6193b8b268848a9c287ee14 SHA-256: 800f5ac64ee60d5d9cd33ac958c1cbab016841d2bea87cc2a2dce15aeb2c5c1f
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The document displays a fake CAPTCHA to lure the user into clicking a link, which likely leads to the download of a malicious script executor. The embedded URL and numerous other similar URLs found within the document body strongly suggest a phishing or scamming attempt. The ML classifier also flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

Heuristics 4

  • Fake CAPTCHA / human verification prompt high SE_FAKE_CAPTCHA
    Document displays a fake CAPTCHA or human-verification prompt — used to trick users into running commands or pressing keyboard shortcuts
  • 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/free-roblox-script-exacutor-game-hack PDF link annotation
    • http://pustaka.bbppketindan.info/repository/free-coin-spin_GM406889139.pdfIn PDF document text
    • http://pustaka.bbppketindan.info//repository/free-robux-with-no-survey_GM431946152.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/coin-master-hack-2021-no-human-verification_GM406889139.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/cmaster-club-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://pustaka.bbppketindan.info//repository/coin-master-free-coins-and-spins-link_GM406889139.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/coin-master-hack-tool-without-verification_GM406889139.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/spinuri-gratis-coin-master_GM406889139.pdfIn PDF document text
    • http://pustaka.bbppketindan.info//repository/coin-master-daily-gift-free-spins-and-coins-link-today_GM406889139.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/coin-master-time-hack-ios_GM406889139.pdfIn PDF document text
    • http://pustaka.bbppketindan.info//repository/easy-way-to-get-robux_GM431946152.pdfIn PDF document text
    • http://pustaka.bbppketindan.info//repository/coin-master-free-spins-link-deutsch-ios_GM406889139.pdfIn PDF document text
    • http://pustaka.bbppketindan.info//repository/2021-no-human-verification-hack-for-coin-master_GM406889139.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/pubg-uc-buy-in-pakistan_GM1330123889.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/is-there-a-way-to-get-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/free-robux-without-any-verification_GM431946152.pdfIn PDF document text
    • http://pustaka.bbppketindan.info//repository/roblox-free-hair-boy_GM431946152.pdfIn PDF document text
    • http://pustaka.bbppketindan.info//repository/coin-master-free-spin-game_GM406889139.pdfIn PDF document text
    • http://pustaka.bbppketindan.info//repository/coin-master-spin-hack_GM406889139.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/www-roblox-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
stream_004_off00005279.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5279 25064 bytes
SHA-256: 8d293841d20db9a972dc430c000d311970c7da4e6169c3e693b972a2ccfe71f7
font_01_sfnt_off00008c83.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8C83 18716 bytes
SHA-256: db50de32b4b615d13410b0627f0c4b4f9f8665c30d907189d2f0898842e14c72

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