Malicious PDF — malware analysis report

Static analysis result for SHA-256 74e7d4002a4a5cc5…

MALICIOUS

PDF

46.4 KB Created: 2021-05-13 05:05:09 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 2655d7de2e48e89120c19f6bb8979325 SHA-1: 189510c363aca4f6d137af0da09150b7ef3c65ea SHA-256: 74e7d4002a4a5cc5f9d0372417eb14887433e1945f338b8924805773295550ac
130 Risk Score

Malware Insights

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

The PDF contains embedded JavaScript and links to external sites that impersonate brands to lure users into clicking for game-related rewards or hacks. The primary lure URL is https://netcdn.xyz/app/431946152/how-to-get-free-robux-on-iphone-game-hack, which likely leads to a credential phishing or malware download page. The ML classifier also flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8948

Heuristics 6

  • 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.
  • Brand-impersonation credential phishing lure high SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: call-to-action link host does not match the impersonated brand: https://netcdn.xyz/app/431946152/how-to-get-free-robux-on-iphone-game-hack.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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/how-to-get-free-robux-on-iphone-game-hack PDF link annotation
    • https://sundae.co.th/js/userfiles/files/microsoft-roblox-rewards_GM431946152.pdfIn PDF document text
    • https://sundae.co.th/js/userfiles/files/hack-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://sundae.co.th/js/userfiles/files/how-to-get-free-roblox_GM431946152.pdfIn PDF document text
    • https://sundae.co.th/js/userfiles/files/earn-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • https://sundae.co.th/js/userfiles/files/scaffold-minecraft-hack_GM479516143.pdfIn PDF document text
    • https://sundae.co.th/js/userfiles/files/roblox-got-talent-piano-hack_GM431946152.pdfIn PDF document text
    • https://sundae.co.th/js/userfiles/files/daily-free-coin-and-spin-link-for-coin-master_GM406889139.pdfIn PDF document text
    • https://sundae.co.th/js/userfiles/files/free-robux-hack-us_GM431946152.pdfIn PDF document text
    • https://sundae.co.th/js/userfiles/files/coin-master-website_GM406889139.pdfIn PDF document text
    • https://sundae.co.th/js/userfiles/files/free-robux-codes-2021-real_GM431946152.pdfIn PDF document text
    • https://sundae.co.th/js/userfiles/files/robux-generator-no-survey_GM431946152.pdfIn PDF document text
    • https://sundae.co.th/js/userfiles/files/free-robux-2021_GM431946152.pdfIn PDF document text
    • https://sundae.co.th/js/userfiles/files/free-coin-and-spin-for-coin-master_GM406889139.pdfIn PDF document text
    • https://sundae.co.th/js/userfiles/files/free-2021-robux_GM431946152.pdfIn PDF document text
    • https://sundae.co.th/js/userfiles/files/how-to-get-free-robux-no-verification-2021_GM431946152.pdfIn PDF document text
    • https://sundae.co.th/js/userfiles/files/coin-master-free-spins-that-really_GM406889139.pdfIn PDF document text
    • https://sundae.co.th/js/userfiles/files/roblox-studio-free-robux_GM431946152.pdfIn PDF document text
    • https://sundae.co.th/js/userfiles/files/get-me-free-robux_GM431946152.pdfIn PDF document text
    • https://sundae.co.th/js/userfiles/files/free-robux-generator-no-verification_GM431946152.pdfIn PDF document text
    • https://sundae.co.th/js/userfiles/files/free-coinmaster-spins_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_003_off00004b2c.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4B2C 25200 bytes
SHA-256: 327c0885cf03778d29f73ace576a3cdbd636197065199225b05c3e004c50c65d
font_01_sfnt_off000084d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x84D1 5696 bytes
SHA-256: 450e3ee45915afe13702bf1d587eb8b9ad88a8d2113419ac9f2fd116a828e139
font_02_sfnt_off000091e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x91E3 18624 bytes
SHA-256: 22426b865d680281cc4768d4f40ba725f59186fc510e45c7c95a1e6bea128c39

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