Malicious PDF — malware analysis report

Static analysis result for SHA-256 3663ef50f0ececf7…

MALICIOUS

PDF

48.9 KB Created: 2021-06-04 01:56:05 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01
MD5: fd3b462cbd6d61522657534408281865 SHA-1: 3ed7f2a04ef839f389e550f18b6f8c67c074d36b SHA-256: 3663ef50f0ececf7a57c1d2cf534d60a7c4ecb7c16e80d8cf4f6231a0b98266d
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 0.9796

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 https://netcdn.online/app/431946152/free-robux-generator-without-human-verification-game-hack PDF link annotation
    • http://library.persadabunda.ac.id/repository/roblox-rape-hack_GM431946152.pdfIn PDF document text
    • http://library.persadabunda.ac.id/repository/free-online-generator-for-coin-master_GM406889139.pdfIn PDF document text
    • http://library.persadabunda.ac.id/repository/how-to-get-free-robux-com_GM431946152.pdfIn PDF document text
    • http://library.persadabunda.ac.id/repository/free-minecraft-bedrock_GM479516143.pdfIn PDF document text
    • http://library.persadabunda.ac.id/repository/minecraft-marketplace-free_GM479516143.pdfIn PDF document text
    • http://library.persadabunda.ac.id/repository/how-to-get-free-premium-roblox_GM431946152.pdfIn PDF document text
    • http://library.persadabunda.ac.id/repository/how-do-u-get-free-robux_GM431946152.pdfIn PDF document text
    • http://library.persadabunda.ac.id/repository/roblox-help-free-robux_GM431946152.pdfIn PDF document text
    • http://library.persadabunda.ac.id/repository/a-lot-of-robux_GM431946152.pdfIn PDF document text
    • http://library.persadabunda.ac.id/repository/get-me-free-robux_GM431946152.pdfIn PDF document text
    • http://library.persadabunda.ac.id/repository/how-to-get-roblox-premium-for-free_GM431946152.pdfIn PDF document text
    • http://library.persadabunda.ac.id/repository/how-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://library.persadabunda.ac.id/repository/how-to-hack-in-roblox-prison-life_GM431946152.pdfIn PDF document text
    • http://library.persadabunda.ac.id/repository/coin-master-hack-355_GM406889139.pdfIn PDF document text
    • http://library.persadabunda.ac.id/repository/coin-master-free-spin-and-coin_GM406889139.pdfIn PDF document text
    • http://library.persadabunda.ac.id/repository/free-robux-with-no-survey_GM431946152.pdfIn PDF document text
    • http://library.persadabunda.ac.id/repository/minecraft-download-free-download_GM479516143.pdfIn PDF document text
    • http://library.persadabunda.ac.id/repository/hack-my-game-xyz-coin-master_GM406889139.pdfIn PDF document text
    • http://library.persadabunda.ac.id/repository/free-robux-com_GM431946152.pdfIn PDF document text
    • http://library.persadabunda.ac.id/repository/tiktok-free-pizza_GM835599320.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off000053d0.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x53D0 24668 bytes
SHA-256: d892bf6d3b04fd79165dc530aab9a407f1a11d0b02f908e4649effcfc1c6c499
font_01_sfnt_off00008ccf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8CCF 3948 bytes
SHA-256: a7142f2d309f69727f15d08c94d86db94072116b9d6fe33a31c71e136de5be67
font_02_sfnt_off000099c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x99C5 19224 bytes
SHA-256: 40a7d61fbe05f3c06cc4b4f213318e5db23b17d00e7c534d307fd6e415ac6071

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