Malicious PDF — malware analysis report

Static analysis result for SHA-256 8ea8863085d217f8…

MALICIOUS

PDF

46.7 KB Created: 2021-05-20 01:12:55 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: b0ec472f28cc1c91d996b4429459f378 SHA-1: b55cc6f6d5a0b439de505a23f391af3239385acf SHA-256: 8ea8863085d217f8c0d34acfaa4e9d4c65a810f8efafcc3dfff4a6c0e28ae95b
142 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document contains multiple embedded URLs, with a primary link pointing to a 'coin master hack' generator. The document body and heuristics indicate a lure for game hacks or secret recovery, suggesting an attempt to phish for credentials or deliver a payload. The ML classifier also flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8948

Heuristics 5

  • Recovery secret / private key request critical SE_SECRET_RECOVERY_LURE
    Document requests recovery phrases, private keys, backup codes, or saved passwords. Requests for these secrets in a document are high-risk.
  • 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.xyz/app/406889139/coin-master-hack-without-verification-ios-game-hack PDF link annotation
    • https://library.itn.ac.id/perpusitn/repository/coin-master-hack-2021-no-survey_GM406889139.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/free-coin-and-spin-in-coin-master_GM406889139.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/free-coins-and-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/coin-master-rewards-free-spins_GM406889139.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/how-to-get-unlimited-robux-2021_GM431946152.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/how-to-get-free-robux-generator_GM431946152.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/free-spins-coin-master-links-blogger_GM406889139.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/wurst-download_GM479516143.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/minecraft-free-computer-game_GM479516143.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/bux-free-robux_GM431946152.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/hacked-client-for-minecraft-bedrock_GM479516143.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/free-robux-picture_GM431946152.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/hack-my-game-xyz-coin-master_GM406889139.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/lazyblocks-com-robux_GM431946152.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/free-game-pack-with-google-play-coin-master_GM406889139.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/free-minecraft-server-maker_GM479516143.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/free-spins-coin-master-march-2021_GM406889139.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/coin-master-free-spin-today-2021_GM406889139.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/free-robux-without-downloading-anything_GM431946152.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/how-to-get-free-robux-2021-easy_GM431946152.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_003_off00004f22.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4F22 24748 bytes
SHA-256: 8eaef27063e67524145a834b620c612d7d470d856a76c60eec6bb8bad9435e5b
font_01_sfnt_off00008842.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8842 3548 bytes
SHA-256: 8aec2cd8e772bbfad7b2d9a4e77958c4d7bef75bd770a8fa103a899d6897ae2f
font_02_sfnt_off0000941a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x941A 18356 bytes
SHA-256: b6c43d10bb82ae062f6a0e78c5dce43c54f6cf4770e0595f07160b7cc6226d33

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