Malicious PDF — malware analysis report

Static analysis result for SHA-256 96daa9d7a02918a6…

MALICIOUS

PDF

48.1 KB Created: 2021-06-11 06:35:42 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 167adf4cd9650ee14dd33242c79242e7 SHA-1: 0ac060d12ade439273c13b6233b818b02636dabf SHA-256: 96daa9d7a02918a6e1e6ec32ab1beecf68512e56cbc1f86d11ff8e9fc49b9d53
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.tw/app/431946152/how-to-get-free-robux-3-easy-steps-game-hack PDF link annotation
    • https://perpus.upp.ac.id/digilib/repository/coinmaster-blogspot_GM406889139.pdfIn PDF document text
    • https://perpus.upp.ac.id/digilib/repository/roblox-gift-card-online-free_GM431946152.pdfIn PDF document text
    • https://perpus.upp.ac.id/digilib/repository/tiktok-free-images_GM835599320.pdfIn PDF document text
    • https://perpus.upp.ac.id/digilib/repository/coin-master-card-hack-2021_GM406889139.pdfIn PDF document text
    • https://perpus.upp.ac.id/digilib/repository/how-do-you-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • https://perpus.upp.ac.id/digilib/repository/free-robux-real-2021_GM431946152.pdfIn PDF document text
    • https://perpus.upp.ac.id/digilib/repository/free-robux-with-no-verification-2021_GM431946152.pdfIn PDF document text
    • https://perpus.upp.ac.id/digilib/repository/roblox-free-hair-girl_GM431946152.pdfIn PDF document text
    • https://perpus.upp.ac.id/digilib/repository/free-roblox-wings_GM431946152.pdfIn PDF document text
    • https://perpus.upp.ac.id/digilib/repository/sfx-roblox-hack_GM431946152.pdfIn PDF document text
    • https://perpus.upp.ac.id/digilib/repository/april-2021-roblox-hacked_GM431946152.pdfIn PDF document text
    • https://perpus.upp.ac.id/digilib/repository/get-free-robux-without-human-verification_GM431946152.pdfIn PDF document text
    • https://perpus.upp.ac.id/digilib/repository/how-to-get-free-robux-without-doing-anything-2021_GM431946152.pdfIn PDF document text
    • https://perpus.upp.ac.id/digilib/repository/coin-master-400-spin-link_GM406889139.pdfIn PDF document text
    • https://perpus.upp.ac.id/digilib/repository/free-spin-coin-master-game_GM406889139.pdfIn PDF document text
    • https://perpus.upp.ac.id/digilib/repository/coin-master-hack-without-human-verification-2021_GM406889139.pdfIn PDF document text
    • https://perpus.upp.ac.id/digilib/repository/roblox-person_GM431946152.pdfIn PDF document text
    • https://perpus.upp.ac.id/digilib/repository/roblox-free-robux-no-verification_GM431946152.pdfIn PDF document text
    • https://perpus.upp.ac.id/digilib/repository/coin-master-official-website_GM406889139.pdfIn PDF document text
    • https://perpus.upp.ac.id/digilib/repository/hack-game-plus-com-coin-master_GM406889139.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_off00005372.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5372 25524 bytes
SHA-256: 2c327b41a8707e8ad2a8b1f3febfefdf4cabbff0a1650ccb08552c7d1dba06f3
font_01_sfnt_off00008d19.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8D19 2824 bytes
SHA-256: 94c1b019735d7e491765340abe50b2897410e2ec65ecf141c08bd9f2220897c4
font_02_sfnt_off000096c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x96C8 19040 bytes
SHA-256: d1b8765e5f594146be44b978058d4d8b57b1b95b8663d9bf094d5a7209346aef

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