Malicious PDF — malware analysis report

Static analysis result for SHA-256 18831fd935f07e03…

MALICIOUS

PDF

50.0 KB Created: 2021-06-03 06:59:04 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 471404728e71ea67f8ee5f293807f294 SHA-1: c06fbcf454c92121e79979f9e5049b5162b5184e SHA-256: 18831fd935f07e03ed3225c1411ed4b006f1cf688f6fa5e3b60f2229418d58b4
188 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and multiple links to known malicious redirectors and sites offering game hacks or currency. The document body and heuristics indicate a lure designed to entice users to click these links, likely leading to further malware downloads or phishing attempts. The primary malicious link identified is https://netcdn.online/app/431946152/get-me-robux-game-hack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9796

Heuristics 6

  • PDF links to a 'free generator / game hack' redirector critical 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. CRITICAL on its own: the /app/<id>/<slug>-game-hack path shape is unambiguous scam infra, and the host rotates so a host-list match can't be relied on.
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) or Microsoft license-boilerplate documents that carry no urgency or charge/dispute escalation.
  • 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
  • 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/get-me-robux-game-hack In PDF document text
    • https://sundae.co.th/js/userfiles/files/haktuts-coin-master-free-spin-link_GM406889139.pdfIn PDF document text
    • https://sundae.co.th/js/userfiles/files/minecraft-games-online-free-no-download_GM479516143.pdfIn PDF document text
    • https://sundae.co.th/js/userfiles/files/how-to-get-free-robux-on-pc_GM431946152.pdfIn PDF document text
    • https://sundae.co.th/js/userfiles/files/coin-master-daily-gifts_GM406889139.pdfIn PDF document text
    • https://sundae.co.th/js/userfiles/files/play-minecraft-pocket-edition-for-free_GM479516143.pdfIn PDF document text
    • https://sundae.co.th/js/userfiles/files/coin-master-haktuts_GM406889139.pdfIn PDF document text
    • https://sundae.co.th/js/userfiles/files/roblox-hack-apk_GM431946152.pdfIn PDF document text
    • https://sundae.co.th/js/userfiles/files/roebucks-on-roblox_GM431946152.pdfIn PDF document text
    • https://sundae.co.th/js/userfiles/files/het-free-robux-website_GM431946152.pdfIn PDF document text
    • https://sundae.co.th/js/userfiles/files/roblox-girl_GM431946152.pdfIn PDF document text
    • https://sundae.co.th/js/userfiles/files/how-to-hack-roblox-accounts-on-phone_GM431946152.pdfIn PDF document text
    • https://sundae.co.th/js/userfiles/files/fb-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://sundae.co.th/js/userfiles/files/robux-no-verification_GM431946152.pdfIn PDF document text
    • https://sundae.co.th/js/userfiles/files/free-robux-no-generator_GM431946152.pdfIn PDF document text
    • https://sundae.co.th/js/userfiles/files/free-coin-spin-daily-link-for-coin-master-game_GM406889139.pdfIn PDF document text
    • https://sundae.co.th/js/userfiles/files/how-can-i-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://sundae.co.th/js/userfiles/files/coin-master-hack-xyz-apk-download_GM406889139.pdfIn PDF document text
    • https://sundae.co.th/js/userfiles/files/roblox-bux-free_GM431946152.pdfIn PDF document text
    • https://sundae.co.th/js/userfiles/files/robux-free-co_GM431946152.pdfIn PDF document text
    • https://sundae.co.th/js/userfiles/files/roblox-online-free-no-download_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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000505e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x505E 28728 bytes
SHA-256: b4802fa17a2c320470274352a6b5f61411d0e590fd4642e6b96303a97475c9d5
font_01_sfnt_off000093e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x93E4 5696 bytes
SHA-256: 450e3ee45915afe13702bf1d587eb8b9ad88a8d2113419ac9f2fd116a828e139
font_02_sfnt_off0000a0f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA0F5 18152 bytes
SHA-256: a45e33870dcdfec4be2d188e583d66387a562064ddf1ebe544b9a56fe2c1f10f

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