Malicious PDF — malware analysis report

Static analysis result for SHA-256 e911086e5189c586…

MALICIOUS

PDF

47.0 KB Created: 2021-06-03 11:22:10 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 3daeaaab4ff5709cc322cd4d2abf006c SHA-1: 141853d16737a0a397383c6a9e17c39b24478e47 SHA-256: e911086e5189c586eebc6c6a8ab58fe46849690a025210e35434e15a6da218c7
82 Risk Score

Malware Insights

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

The document presents a fake CAPTCHA lure to trick users into interacting with a malicious link, specifically 'https://netcdn.online/app/431946152/free-robux-games-that-actually-work-2021-game-hack'. This behavior is indicative of a phishing or social engineering attack aimed at delivering a secondary payload. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9832

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/free-robux-games-that-actually-work-2021-game-hack PDF link annotation
    • http://opac.library.uib.ac.id/repository/how-to-get-free-coins-on-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://opac.library.uib.ac.id/repository/roblox-inappropriate_GM431946152.pdfIn PDF document text
    • http://opac.library.uib.ac.id//repository/free-roblox-accounts-with-robux-that-work-not-banned-2021_GM431946152.pdfIn PDF document text
    • http://opac.library.uib.ac.id/repository/static-moonactive-net-link_GM406889139.pdfIn PDF document text
    • http://opac.library.uib.ac.id/repository/coin-master-hack-game-download_GM406889139.pdfIn PDF document text
    • http://opac.library.uib.ac.id/repository/coin-master-gold-cards-free-2021_GM406889139.pdfIn PDF document text
    • http://opac.library.uib.ac.id/repository/free-vpn-for-minecraft_GM479516143.pdfIn PDF document text
    • http://opac.library.uib.ac.id/repository/how-to-get-minecraft-for-free-on-chromebook_GM479516143.pdfIn PDF document text
    • http://opac.library.uib.ac.id/repository/uprobuxcom-free-robux_GM431946152.pdfIn PDF document text
    • http://opac.library.uib.ac.id//repository/113-hacked-client_GM479516143.pdfIn PDF document text
    • http://opac.library.uib.ac.id/repository/free-roblox-hair-to-wear_GM431946152.pdfIn PDF document text
    • http://opac.library.uib.ac.id//repository/cool-free-minecraft-skins_GM479516143.pdfIn PDF document text
    • http://opac.library.uib.ac.id/repository/01-conoce-este-hack-oficial-robux_GM431946152.pdfIn PDF document text
    • http://opac.library.uib.ac.id//repository/roblox-zone-free-robux_GM431946152.pdfIn PDF document text
    • http://opac.library.uib.ac.id/repository/coin-master-coins-hack_GM406889139.pdfIn PDF document text
    • http://opac.library.uib.ac.id//repository/robloxheroxyz-free-robux_GM431946152.pdfIn PDF document text
    • http://opac.library.uib.ac.id/repository/coin-master-cards-free_GM406889139.pdfIn PDF document text
    • http://opac.library.uib.ac.id/repository/dominus-roblox-free_GM431946152.pdfIn PDF document text
    • http://opac.library.uib.ac.id//repository/robux-giver_GM431946152.pdfIn PDF document text
    • http://opac.library.uib.ac.id/repository/coin-master-coins_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_off000052d5.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x52D5 26736 bytes
SHA-256: caa5b14fb4b72fd6f9c50f135de3af469d3dc69972194bb57019065581e6b75d
font_01_sfnt_off00009091.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9091 19796 bytes
SHA-256: 825df7cf396e8d9c124972fb8483e304b72a256d7e3507e7d5ad5df48b88867f

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