Malicious PDF — malware analysis report

Static analysis result for SHA-256 4fdff9c7a79e6f45…

MALICIOUS

PDF

45.0 KB Created: 2021-06-03 05:00:20 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 4b3cfaa6047f3112a11833f2b722b77c SHA-1: 6f9cc4b5aa75a02204e24c8cf6e4199fb4eaf246 SHA-256: 4fdff9c7a79e6f456d0b110fe42d66cb97ad203fbb0393d1b6f23f1818553cee
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 0.9865

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/is-it-possible-to-get-free-robux-game-hack PDF link annotation
    • http://perpus.wdh.ac.id//repository/free-robux-no-email_GM431946152.pdfIn PDF document text
    • http://perpus.wdh.ac.id//repository/spin-free-coin-master_GM406889139.pdfIn PDF document text
    • http://perpus.wdh.ac.id//repository/roblox-tix-generator_GM431946152.pdfIn PDF document text
    • http://perpus.wdh.ac.id//repository/free-robux-without-any-verification_GM431946152.pdfIn PDF document text
    • http://perpus.wdh.ac.id//repository/coin-master-hack-programmers_GM406889139.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/free-coin-master-game_GM406889139.pdfIn PDF document text
    • http://perpus.wdh.ac.id//repository/how-to-get-free-robux-easy-hack_GM431946152.pdfIn PDF document text
    • http://perpus.wdh.ac.id//repository/free-downloads-for-coin-master-daily-rewards_GM406889139.pdfIn PDF document text
    • http://perpus.wdh.ac.id//repository/20-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/krnl-download_GM431946152.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/how-to-hack-coin-master-pc_GM406889139.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/coin-master-apk_GM406889139.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/how-to-play-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/get-free-robux_GM431946152.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/free-roblox-adopt-me-pets_GM431946152.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/free-spins-coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/robux-website_GM431946152.pdfIn PDF document text
    • http://perpus.wdh.ac.id//repository/how-you-get-free-robux_GM431946152.pdfIn PDF document text
    • http://perpus.wdh.ac.id//repository/coin-master-spins_GM406889139.pdfIn PDF document text
    • http://perpus.wdh.ac.id//repository/is-minecraft-free-on-xbox_GM479516143.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_off00005038.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5038 26764 bytes
SHA-256: 5354d2bc53229c33958c0a618f8e7492a0a96932653b6a1fd75d3ce60373d939
font_01_sfnt_off00008d00.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8D00 18464 bytes
SHA-256: 524b785793646940a6547919a11f6df6f4967036cf63710b5a4934c88ca16ae7

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