Malicious PDF — malware analysis report

Static analysis result for SHA-256 1448faa061aa3d1a…

MALICIOUS

PDF

45.3 KB Created: 2021-06-03 07:12:52 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 13d3ffb34b8b3bc5b56e719edb1a5693 SHA-1: 52fe1d2a43045a875b44ed01cfcedfcd0110a491 SHA-256: 1448faa061aa3d1a42c4c31b49681a2a832428aa5280258c1393e5a900fa0be6
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The document presents a fake CAPTCHA lure to trick users into interacting with embedded links, likely leading to a malicious download or scam. The primary external URI, https://netcdn.online/app/431946152/how-to-get-1m-robux-for-free-2021-game-hack, is suspicious and suggests a phishing or malware distribution attempt. While no scripts were explicitly extracted, the PDF structure and heuristics indicate malicious intent.

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/431946152/how-to-get-1m-robux-for-free-2021-game-hack PDF link annotation
    • http://library.gkigadingserpong.org/repository/how-do-u-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/coin-master_GM406889139.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/minecraft-story-mode-free-download_GM479516143.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/free-roblox-clothes-templates_GM431946152.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/free-robux-only-1-step_GM431946152.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/games-like-coin-master_GM406889139.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/roblox-points_GM431946152.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/lazyblox-com-free-robux_GM431946152.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/how-to-get-free-coins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/coin-master-free-spins-link-blogspot_GM406889139.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/how-to-get-free-spins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/coin-master-free-spins-app_GM406889139.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/free-views-on-tiktok_GM835599320.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/blox-fish-free-robux_GM431946152.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/coin-master-gold-cards-hack_GM406889139.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/robux-free-gift-card-org-hack_GM431946152.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/coin-master-gold-cards-hack-english_GM406889139.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/roblox-no-download-hack_GM431946152.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/minecraft-wurst-hacked-client_GM479516143.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/free-spins-on-coin-master-2021_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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off000050bb.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x50BB 26000 bytes
SHA-256: a25f916d1fc87cdae01e6cd7b702b009142b43881c9fdb5c6739563c606a4981
font_01_sfnt_off00008ca2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8CA2 18880 bytes
SHA-256: 85243dd873b5ff93ed66b1dde4b629a38a40fff16a3dfbdfeeaad26bd93fba3f

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