Malicious PDF — malware analysis report

Static analysis result for SHA-256 75bccd74797d267d…

MALICIOUS

PDF

48.2 KB Created: 2021-06-03 08:40:53 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 09bfa44876c3fa9e3096270668ae96e5 SHA-1: 16325942607657e7ad00f003f61cd26f5f4b906f SHA-256: 75bccd74797d267dcb99d0f5f4dd18d561a1811d18107dd1796546f982ccd029
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The sample is a PDF that displays a fake CAPTCHA or human verification prompt, a common lure to trick users into downloading further malicious content. The ML classifier strongly flagged this PDF as malicious. An external URI pointing to a potential payload download was extracted, suggesting the document's purpose is to facilitate the download and execution of a second-stage artifact.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9796

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/431946152/my-robux-game-hack PDF link annotation
    • http://pustaka.fti.unand.ac.id/repository/cute-free-roblox-outfits_GM431946152.pdfIn PDF document text
    • http://pustaka.fti.unand.ac.id/repository/tiktok-free-views-apk-download_GM835599320.pdfIn PDF document text
    • http://pustaka.fti.unand.ac.id/repository/how-to-get-free-followers-on-tiktok-without-human-verification_GM835599320.pdfIn PDF document text
    • http://pustaka.fti.unand.ac.id//repository/roblox-no-download-hack_GM431946152.pdfIn PDF document text
    • http://pustaka.fti.unand.ac.id/repository/bloxpink-free-robux_GM431946152.pdfIn PDF document text
    • http://pustaka.fti.unand.ac.id//repository/minecraft-windows-10-hacked-client_GM479516143.pdfIn PDF document text
    • http://pustaka.fti.unand.ac.id//repository/how-can-i-get-robux_GM431946152.pdfIn PDF document text
    • http://pustaka.fti.unand.ac.id//repository/roblox-rewards-site_GM431946152.pdfIn PDF document text
    • http://pustaka.fti.unand.ac.id/repository/coin-master-hack-online_GM406889139.pdfIn PDF document text
    • http://pustaka.fti.unand.ac.id/repository/free-spin-online-tool-coin-master_GM406889139.pdfIn PDF document text
    • http://pustaka.fti.unand.ac.id//repository/minecraft-pocket-edition-free-apk_GM479516143.pdfIn PDF document text
    • http://pustaka.fti.unand.ac.id/repository/coin-master-hack-online-cheat_GM406889139.pdfIn PDF document text
    • http://pustaka.fti.unand.ac.id/repository/minecraft-hack-app_GM479516143.pdfIn PDF document text
    • http://pustaka.fti.unand.ac.id//repository/free-robux-no-verification-required_GM431946152.pdfIn PDF document text
    • http://pustaka.fti.unand.ac.id/repository/roblox-hack-site_GM431946152.pdfIn PDF document text
    • http://pustaka.fti.unand.ac.id//repository/spin-coin-master-free_GM406889139.pdfIn PDF document text
    • http://pustaka.fti.unand.ac.id//repository/daily-free-spin-link-in-coin-master_GM406889139.pdfIn PDF document text
    • http://pustaka.fti.unand.ac.id/repository/gameoffice-net-hack-coin-master_GM406889139.pdfIn PDF document text
    • http://pustaka.fti.unand.ac.id/repository/free-robux-without-doing-anything_GM431946152.pdfIn PDF document text
    • http://pustaka.fti.unand.ac.id/repository/coin-master-free-spinv1-0apkpure-com-apk_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00004fe5.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4FE5 24508 bytes
SHA-256: ea5ec5cee1cf98aa9feffc4b4dc8bbf5895f7c3b1e207cac16d6d09899074df1
font_01_sfnt_off000087f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x87F2 7448 bytes
SHA-256: a76ff9b4805dcff342f7268a16e2e3c2ff2b31b96c381fe4deb6ceea777bce90
font_02_sfnt_off000099d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x99D4 18228 bytes
SHA-256: 061086f3647f2708bedfba3c3449e34ca39340f9a5e056b2aad302ae8ac83e9c

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