Malicious PDF — malware analysis report

Static analysis result for SHA-256 5c9037343543596f…

MALICIOUS

PDF

45.6 KB Created: 2021-05-16 05:47:42 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 727e5e154edc38648775fd122fd87849 SHA-1: 6d3dd14eaabb4811bcd86c4064992609cafd8c25 SHA-256: 5c9037343543596f3d9770e1c7c804a5053c26c3be1ece3945072b861314a2a9
122 Risk Score

Malware Insights

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

This PDF document employs a fake CAPTCHA lure to trick users into interacting with malicious content, specifically by clicking on links related to free game currency or hacks. The primary link, https://netcdn.xyz/app/431946152/www-claim-gg-to-earn-free-robux-game-hack, is presented as a generator for free Robux. While no scripts were explicitly extracted, the PDF structure and heuristics suggest potential exploitation or redirection to malicious sites, aligning with common phishing and scam tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 5

  • PDF links to a 'free generator / game hack' redirector high PDF_GAME_HACK_REDIRECT_LURE
    PDF's clickable action targets a redirector of the form /app/<id>/<slug>-game-hack — the landing-page shape of a large SEO 'free spins / generator / game hack' lure family that funnels victims through rotating disposable hosts to a malware/scam payload. The multi-link variants also trip ML/link-farm rules; this catches the single-link variants that otherwise score clean.
  • 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.xyz/app/431946152/www-claim-gg-to-earn-free-robux-game-hack PDF link annotation
    • https://www.takathmanduhotel.com/userfiles/files/coin-master-free-attack_GM406889139.pdfIn PDF document text
    • https://www.takathmanduhotel.com/userfiles/files/free-robux-no-human-verification-no-survey_GM431946152.pdfIn PDF document text
    • https://www.takathmanduhotel.com/userfiles/files/roblox-hacks-and-cheats_GM431946152.pdfIn PDF document text
    • https://www.takathmanduhotel.com/userfiles/files/free-spins-and-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://www.takathmanduhotel.com/userfiles/files/wurst-115_GM479516143.pdfIn PDF document text
    • https://www.takathmanduhotel.com/userfiles/files/free-coin-master-spin-app_GM406889139.pdfIn PDF document text
    • https://www.takathmanduhotel.com/userfiles/files/free-minecraft-java-edition-codes_GM479516143.pdfIn PDF document text
    • https://www.takathmanduhotel.com/userfiles/files/master-free-spin-and-coin-link_GM406889139.pdfIn PDF document text
    • https://www.takathmanduhotel.com/userfiles/files/get-free-spins-on-coin-master-no-human-verification_GM406889139.pdfIn PDF document text
    • https://www.takathmanduhotel.com/userfiles/files/free-robux-scams_GM431946152.pdfIn PDF document text
    • https://www.takathmanduhotel.com/userfiles/files/coinmasterdailyfreespins-com_GM406889139.pdfIn PDF document text
    • https://www.takathmanduhotel.com/userfiles/files/roblox-rewards_GM431946152.pdfIn PDF document text
    • https://www.takathmanduhotel.com/userfiles/files/free-robux-exe_GM431946152.pdfIn PDF document text
    • https://www.takathmanduhotel.com/userfiles/files/haktuts-coin-master-free-spin-today_GM406889139.pdfIn PDF document text
    • https://www.takathmanduhotel.com/userfiles/files/free-spins-coin-master-april-2021_GM406889139.pdfIn PDF document text
    • https://www.takathmanduhotel.com/userfiles/files/coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • https://www.takathmanduhotel.com/userfiles/files/hack-coin-master-no-survey_GM406889139.pdfIn PDF document text
    • https://www.takathmanduhotel.com/userfiles/files/coin-master-free-coins-2021_GM406889139.pdfIn PDF document text
    • https://www.takathmanduhotel.com/userfiles/files/coin-master-free-chest-link_GM406889139.pdfIn PDF document text
    • https://www.takathmanduhotel.com/userfiles/files/get-me-free-robux_GM431946152.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_003_off00004bf0.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4BF0 28392 bytes
SHA-256: 0faf48f6b1c7d1c7062e15e705c281c2982f7e8f87fc84c14db38ed569d8e4f9
font_01_sfnt_off00008cfb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8CFB 19348 bytes
SHA-256: 6c8aa2bd696777b424cffe98c1c37b7aceb2d1b30a10c6ebb087e43f3f958d57

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