Malicious PDF — malware analysis report

Static analysis result for SHA-256 e6a271289fe052d1…

MALICIOUS

PDF

45.4 KB Created: 2021-06-03 04:47:59 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-16
MD5: c0f49a44e0c990442df1c4124fc19e3a SHA-1: 4cf9d875f17f0bdabc2499231e50aebc75b86de1 SHA-256: e6a271289fe052d18249cbf9bd90ba80ee8b3ad6ab2e785fcf15f137ab1a4dcc
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 User Execution: Malicious File

The document presents itself as a fake CAPTCHA or human verification prompt to trick users into downloading a malicious application. It contains multiple embedded URLs, including one pointing to a potential application download, and a high ML classifier score further supports its malicious nature. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9864

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.online/app/406889139/coin-master-hack-app-2021-download-game-hack PDF link annotation
    • http://pustaka.bbppketindan.info//repository/coin-master-hack-com_GM406889139.pdfIn PDF document text
    • http://pustaka.bbppketindan.info//repository/minecraft-18-9-hacked-client_GM479516143.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/http-blackgamesus-coinmasterhack_GM406889139.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/free-roblox-girl-clothes_GM431946152.pdfIn PDF document text
    • http://pustaka.bbppketindan.info//repository/free-robux-without-survey_GM431946152.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/pubg-uc-new-freepik_GM1330123889.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/how-do-you-get-robux_GM431946152.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/robux-websites-that-work_GM431946152.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/free-private-server-roblox-strucid_GM431946152.pdfIn PDF document text
    • http://pustaka.bbppketindan.info//repository/free-promo-codes-roblox_GM431946152.pdfIn PDF document text
    • http://pustaka.bbppketindan.info//repository/can-you-host-a-minecraft-server-for-free_GM479516143.pdfIn PDF document text
    • http://pustaka.bbppketindan.info//repository/coin-master-400-spin-link_GM406889139.pdfIn PDF document text
    • http://pustaka.bbppketindan.info//repository/haktuts-coin-master_GM406889139.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/free-spin-link-coin-master-today_GM406889139.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/coin-master-game-for-pc-free-download_GM406889139.pdfIn PDF document text
    • http://pustaka.bbppketindan.info//repository/promo-code-free-robux_GM431946152.pdfIn PDF document text
    • http://pustaka.bbppketindan.info//repository/how-to-get-minecraft-for-free-on-ps4-2021_GM479516143.pdfIn PDF document text
    • http://pustaka.bbppketindan.info//repository/como-hackear-coin-master-gratis_GM406889139.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/oprewards-login_GM431946152.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/how-to-get-free-robux-app_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_off000054c2.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x54C2 24540 bytes
SHA-256: 9005c16217645bb7ae160981024f1269253685b7045f9482dc3f981826952cda
font_01_sfnt_off00008d04.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8D04 18876 bytes
SHA-256: be5be3eecf441f83945d2891df9f868a1d3a5dfc921b9d485f27c984001e53f9

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