Malicious PDF — malware analysis report

Static analysis result for SHA-256 b6add3d8d3b36354…

MALICIOUS

PDF

34.7 KB Created: 2021-07-05 05:51:25 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 30991549403f55437065bb667b48f22c SHA-1: f562aa934e9380278bef1b356c828c6730ac35fb SHA-256: b6add3d8d3b363542bb541e45d3fa2767669e73d5c80156a18eda4e02b209605
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 0.9980

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 http://netcdn.tw/app/406889139/coin-master-free-spins-link-download-game-hack PDF link annotation
    • https://perpus.upp.ac.id/digilib/repository/pokemon-go-free-items_GM1094591345.pdfIn PDF document text
    • https://perpus.upp.ac.id/digilib/repository/how-to-get-free-umbrella-on-camping-roblox_GM431946152.pdfIn PDF document text
    • https://perpus.upp.ac.id/digilib/repository/roblox-hackprogamers-com_GM431946152.pdfIn PDF document text
    • https://perpus.upp.ac.id/digilib/repository/free-spins-coin-master-blogspot_GM406889139.pdfIn PDF document text
    • https://perpus.upp.ac.id/digilib/repository/coin-master-free-daily-spins-link_GM406889139.pdfIn PDF document text
    • https://perpus.upp.ac.id/digilib/repository/free-robux-scams_GM431946152.pdfIn PDF document text
    • https://perpus.upp.ac.id/digilib/repository/free-robux-roblox-promo-codes_GM431946152.pdfIn PDF document text
    • https://perpus.upp.ac.id/digilib/repository/coin-master-free-cards-hack_GM406889139.pdfIn PDF document text
    • https://perpus.upp.ac.id/digilib/repository/youtube-yammy-xox-roblox-hacking_GM431946152.pdfIn PDF document text
    • https://perpus.upp.ac.id/digilib/repository/free-flip-master-coins_GM406889139.pdfIn PDF document text
    • https://perpus.upp.ac.id/digilib/repository/coin-master-free-coins-and-spins-online-tool_GM406889139.pdfIn PDF document text
    • https://perpus.upp.ac.id/digilib/repository/codes-for-skyscraper-tycoon-roblox-that-give-free-money_GM431946152.pdfIn PDF document text
    • https://perpus.upp.ac.id/digilib/repository/free-robux-co_GM431946152.pdfIn PDF document text
    • https://perpus.upp.ac.id/digilib/repository/free-ways-to-get-robux_GM431946152.pdfIn PDF document text
    • https://perpus.upp.ac.id/digilib/repository/minecraft-app-store-free_GM479516143.pdfIn PDF document text
    • https://perpus.upp.ac.id/digilib/repository/pastebin-robux-hack-2021_GM431946152.pdfIn PDF document text
    • https://perpus.upp.ac.id/digilib/repository/free-robux-accounts-2021_GM431946152.pdfIn PDF document text
    • https://perpus.upp.ac.id/digilib/repository/oprewards-com-robux_GM431946152.pdfIn PDF document text
    • https://perpus.upp.ac.id/digilib/repository/free-robux-generator-for-kids_GM431946152.pdfIn PDF document text
    • https://perpus.upp.ac.id/digilib/repository/free-coin-and-spin-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
font_00_sfnt_off0000300a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x300A 22804 bytes
SHA-256: 31d2473b6cb91d63e11e4b8142062d22d635d3302bc3a74a7a46e33ff8e58c76
font_01_sfnt_off00006322.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6322 18924 bytes
SHA-256: a4bb17e2b546a4d7fe34b124958f87fb40140c6e90ac4756c30edd8d3bfebad3

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