Malicious PDF — malware analysis report

Static analysis result for SHA-256 c4d967bce3ecb2df…

MALICIOUS

PDF

45.8 KB Created: 2021-06-03 08:33:52 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 8597d35a65a4f69998cc6cb3a20b331f SHA-1: ab6046fb8dd95504adc10d5fbc8931ae96bb045b SHA-256: c4d967bce3ecb2df7f3cd9ee12431e55517b9697d41ba301ecda02c15aaf1365
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 0.9864

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/give-free-robux-game-hack PDF link annotation
    • http://pustaka.bbppketindan.info/repository/minecraft-apk-114-4_GM479516143.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/free-robux-mobile_GM431946152.pdfIn PDF document text
    • http://pustaka.bbppketindan.info//repository/coin-master-hack-activegamer_GM406889139.pdfIn PDF document text
    • http://pustaka.bbppketindan.info//repository/does-coin-master-hack-work_GM406889139.pdfIn PDF document text
    • http://pustaka.bbppketindan.info//repository/coin-master-free-400-spin-link_GM406889139.pdfIn PDF document text
    • http://pustaka.bbppketindan.info//repository/coin-master-hack-apk_GM406889139.pdfIn PDF document text
    • http://pustaka.bbppketindan.info//repository/real-robux-generator-2021_GM431946152.pdfIn PDF document text
    • http://pustaka.bbppketindan.info//repository/minecraft-free-edition_GM479516143.pdfIn PDF document text
    • http://pustaka.bbppketindan.info//repository/coin-master-card-collection-hack-2021_GM406889139.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/how-to-get-free-food-on-coin-master_GM406889139.pdfIn PDF document text
    • http://pustaka.bbppketindan.info//repository/is-roblox-free-on-pc_GM431946152.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/tiktok-free-advertising_GM835599320.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/how-to-get-free-spins-on-coin-master-2021-links_GM406889139.pdfIn PDF document text
    • http://pustaka.bbppketindan.info//repository/coin-master-viking-quest-hack_GM406889139.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/coin-master-free-spins-8-14-2021_GM406889139.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/free-robux-no-verification-no-download-2021_GM431946152.pdfIn PDF document text
    • http://pustaka.bbppketindan.info//repository/tiktok-free-download_GM835599320.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/coin-master-hack-2021-iphone_GM406889139.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/free-coin-master-hacks-no-verification_GM406889139.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/how-many-free-spin-links-is-there-for-coin-master_GM406889139.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
stream_004_off00005214.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5214 27164 bytes
SHA-256: 5410b24ca664ba9cbeeaeaac95758b3c80077fb5f8fce4c5dc4b95152b26397a
font_01_sfnt_off00009080.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9080 18248 bytes
SHA-256: ea59f1cb8b041c2b832a039673c57edae81c360e33a5bea04888abdf43ec1c43

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