Malicious PDF — malware analysis report

Static analysis result for SHA-256 63f98283fdd4b4bd…

MALICIOUS

PDF

36.2 KB Created: 2021-07-04 11:06:11 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-05
MD5: a89721ea87505733ff21353d2ae582a7 SHA-1: 697ad918191c2ea9efa4f4ef1920f9be4a3c9c49 SHA-256: 63f98283fdd4b4bdf5e79298129836dec47ac6d5a9a2653afbc449842ade5e58
82 Risk Score

Malware Insights

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

This PDF document employs a common lure of 'free Robux' and game hacks to entice users. It contains an external URI pointing to a suspicious domain, likely serving as a redirector to malicious content or a phishing site. The ML classifier strongly flagged this PDF as malicious, and the presence of embedded URLs and a call-to-action button further supports a malicious intent, likely to download and execute a second-stage payload.

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/free-robux-generator-2021-game-hack PDF link annotation
    • https://na.itk.ac.id/asset/backend/upload/ckeditor/files/fast-free-robux_GM431946152.pdfIn PDF document text
    • https://na.itk.ac.id/asset/backend/upload/ckeditor/files/free-synapse-roblox-exploit-13-05-18_GM431946152.pdfIn PDF document text
    • https://na.itk.ac.id/asset/backend/upload/ckeditor/files/hack-script-roblox-free_GM431946152.pdfIn PDF document text
    • https://na.itk.ac.id/asset/backend/upload/ckeditor/files/coin-master-gold-cards-free_GM406889139.pdfIn PDF document text
    • https://na.itk.ac.id/asset/backend/upload/ckeditor/files/minecraft-free-computer-game_GM479516143.pdfIn PDF document text
    • https://na.itk.ac.id/asset/backend/upload/ckeditor/files/free-minecraft-codes_GM479516143.pdfIn PDF document text
    • https://na.itk.ac.id/asset/backend/upload/ckeditor/files/how-to-get-free-robux-no-human-verification_GM431946152.pdfIn PDF document text
    • https://na.itk.ac.id/asset/backend/upload/ckeditor/files/como-hackear-roblox-en-pc_GM431946152.pdfIn PDF document text
    • https://na.itk.ac.id/asset/backend/upload/ckeditor/files/cheat-engine-roblox-deadzone-remade-hack_GM431946152.pdfIn PDF document text
    • https://na.itk.ac.id/asset/backend/upload/ckeditor/files/roblox-how-to-get-free-shirts_GM431946152.pdfIn PDF document text
    • https://na.itk.ac.id/asset/backend/upload/ckeditor/files/free-spins-for-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://na.itk.ac.id/asset/backend/upload/ckeditor/files/coin-master-hack-download-apk_GM406889139.pdfIn PDF document text
    • https://na.itk.ac.id/asset/backend/upload/ckeditor/files/roblox-promo-codes-for-free-robux_GM431946152.pdfIn PDF document text
    • https://na.itk.ac.id/asset/backend/upload/ckeditor/files/hack-roblox-with-edit-this-cookie_GM431946152.pdfIn PDF document text
    • https://na.itk.ac.id/asset/backend/upload/ckeditor/files/free-coins-on-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://na.itk.ac.id/asset/backend/upload/ckeditor/files/coin-master-free-spins-and-coins-hack_GM406889139.pdfIn PDF document text
    • https://na.itk.ac.id/asset/backend/upload/ckeditor/files/redeem-roblox-card-free_GM431946152.pdfIn PDF document text
    • https://na.itk.ac.id/asset/backend/upload/ckeditor/files/free-minecraft-texture-packs_GM479516143.pdfIn PDF document text
    • https://na.itk.ac.id/asset/backend/upload/ckeditor/files/noclip-hack-on-roblox_GM431946152.pdfIn PDF document text
    • https://na.itk.ac.id/asset/backend/upload/ckeditor/files/robux-free-online_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_off00003399.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3399 23204 bytes
SHA-256: dd3ec5a02b2aa632dff38f10ae237f8ee7d82556636a3583b2c65054466bcfd0
font_01_sfnt_off000067d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x67D3 19224 bytes
SHA-256: e428ca4c21c8feda58ff9d2cee9e63eb7b19a929803cf1f6eebeef0755d1c14a

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