Malicious PDF — malware analysis report

Static analysis result for SHA-256 9febd0090d8890ac…

MALICIOUS

PDF

33.1 KB Created: 2021-07-10 02:36:51 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01
MD5: 9d33f37e97f40762b5e3ed1d1f28afe4 SHA-1: 04984fbdf79e21068ef34c8a9e996d773c30c873 SHA-256: 9febd0090d8890accf173d2b9895add8886bf0c103a2fd5957d086b5f2f3514f
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. The file routes users through malicious redirector infrastructure and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • 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.
  • 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 http://netcdn.tw/app/431946152/how-can-i-get-free-robux-game-hack PDF link annotation
    • https://hotelyetihome.com/userfiles/files/roblox-hack_GM431946152.pdfIn PDF document text
    • https://hotelyetihome.com/userfiles/files/robux-com-roblox_GM431946152.pdfIn PDF document text
    • https://hotelyetihome.com/userfiles/files/online-robux-hack-2021_GM431946152.pdfIn PDF document text
    • https://hotelyetihome.com/userfiles/files/getrobux-come_GM431946152.pdfIn PDF document text
    • https://hotelyetihome.com/userfiles/files/free-coin-master-coins_GM406889139.pdfIn PDF document text
    • https://hotelyetihome.com/userfiles/files/free-coins-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://hotelyetihome.com/userfiles/files/free-coins-coin-master-blog_GM406889139.pdfIn PDF document text
    • https://hotelyetihome.com/userfiles/files/how-to-hack-roblox-on-mobile_GM431946152.pdfIn PDF document text
    • https://hotelyetihome.com/userfiles/files/hack-de-roblox-2021-diciembre_GM431946152.pdfIn PDF document text
    • https://hotelyetihome.com/userfiles/files/roblox-lvl-7-exploit-free_GM431946152.pdfIn PDF document text
    • https://hotelyetihome.com/userfiles/files/how-to-get-free-robux-without-surveys_GM431946152.pdfIn PDF document text
    • https://hotelyetihome.com/userfiles/files/earn-free-spins-in-coin-master_GM406889139.pdfIn PDF document text
    • https://hotelyetihome.com/userfiles/files/free-costume-in-roblox_GM431946152.pdfIn PDF document text
    • https://hotelyetihome.com/userfiles/files/free-robux-generator-com-roblox-hack_GM431946152.pdfIn PDF document text
    • https://hotelyetihome.com/userfiles/files/how-to-get-free-robux-without-verifying_GM431946152.pdfIn PDF document text
    • https://hotelyetihome.com/userfiles/files/free-coins-and-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • https://hotelyetihome.com/userfiles/files/how-to-get-minecraft-coins-for-free_GM479516143.pdfIn PDF document text
    • https://hotelyetihome.com/userfiles/files/free-robux-no-verification-or-survey_GM431946152.pdfIn PDF document text
    • https://hotelyetihome.com/userfiles/files/coin-master-free-spins-link-march-2021_GM406889139.pdfIn PDF document text
    • https://hotelyetihome.com/userfiles/files/how-to-get-free-robux-com_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002c7a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2C7A 21828 bytes
SHA-256: 0c3c51e5a6d2ce8bde7e1db51c2827bc4c66d710bbe47c7ecfb34b367cd9ae65
font_01_sfnt_off00005c63.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5C63 18984 bytes
SHA-256: 88d69eb3e5aacbb9415b7e9d5cab519469ee3fdfdf18acc61836835876a3bab2

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