Malicious PDF — malware analysis report

Static analysis result for SHA-256 318531d55acba675…

MALICIOUS

PDF

35.4 KB Created: 2021-06-28 18:26:35 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 6ff3fbe239c2910d94f36cca4425bcdf SHA-1: a9b935bec93ed1fb5bc8d3960e16800f3cc7181b SHA-256: 318531d55acba675197e6ccf8b079edfe5c3e83a12dc4bb139459ac31e89c732
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.co/app/431946152/codes-to-get-free-money-on-roblox-treasure-hunt-simulator-game-hack PDF link annotation
    • https://opac.umrah.ac.id/repository/free-spins-for-coin-master-ios_GM406889139.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/pastebin-hack-for-roblox_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/114-hacks_GM479516143.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/how-to-get-22-000-free-robux_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/do-roblox-gift-cards-give-you-free-robux_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/free-admin-roblox-how-to-get_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/free-robux-no-verifacation-or-scam-mobile_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/how-to-get-gold-cards-on-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/coin-master-card-collection-link_GM406889139.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/roblox-games-free-play-online_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/free-roblox-printable_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/ninja-legends-roblox-hacks-pet_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/roblox-gift-card-for-free_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/how-to-get-free-robux-on-windows-10_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/roblox-robux-hack-2021-no-survey_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/master-coin-free_GM406889139.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/fray-hacks-roblox_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/free-avatar-stuff-roblox_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/how-to-get-free-robux-using-free-codes_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/coin-master-cards-free_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_off0000319a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x319A 22344 bytes
SHA-256: 09ee72ca275bfb2460685b1374c00991393abf741b2d33da02529f90a87e03bb
font_01_sfnt_off00006349.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6349 19824 bytes
SHA-256: 4ba8888ad4726a405f24bf61168fffdf358a0e75439c39a4878470cbc18788e8

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