Malicious PDF — malware analysis report

Static analysis result for SHA-256 ff566124c5335fe4…

MALICIOUS

PDF

35.9 KB Created: 2021-07-05 22:09:33 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01
MD5: bc981814d94841027c693569c9491054 SHA-1: 9d502bcc3099ce063788da1b2bcaf8018fe09dca SHA-256: ff566124c5335fe4ae18cb402f8e6a038a06e0fafe070f16f9f1eadd0a17f4f0
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/free-spins-coin-master-app-ios-game-hack PDF link annotation
    • http://www.pspmrsmkkb.com/webopac/repository/free-robux-promo-codes_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmkkb.com/webopac/repository/how-can-i-get-free-robux_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmkkb.com/webopac/repository/pastebin-hack-robux-free_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmkkb.com/webopac/repository/free-muscle-t-shirt-roblox_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmkkb.com/webopac/repository/free-roblox-website_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmkkb.com/webopac/repository/real-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://www.pspmrsmkkb.com/webopac/repository/free-coins-and-spins-for-coin-master-game_GM406889139.pdfIn PDF document text
    • http://www.pspmrsmkkb.com/webopac/repository/coinmasterhack-club_GM406889139.pdfIn PDF document text
    • http://www.pspmrsmkkb.com/webopac/repository/hacking-apps-for-roblox_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmkkb.com/webopac/repository/coin-master-free-spins-today-daily-links_GM406889139.pdfIn PDF document text
    • http://www.pspmrsmkkb.com/webopac/repository/free-robux-you-don-t-have-to-do-anything_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmkkb.com/webopac/repository/how-to-get-free-robux-on-ipad-ios_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmkkb.com/webopac/repository/free-robux-no-survey-or-human-verification_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmkkb.com/webopac/repository/roblox-password-hacker-download_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmkkb.com/webopac/repository/roblox-hacking-website_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmkkb.com/webopac/repository/mobihack-roblox-hack_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmkkb.com/webopac/repository/free-robux-co_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmkkb.com/webopac/repository/free-abilities-for-twisted-murderer-on-roblox-hack_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmkkb.com/webopac/repository/robux-free-online_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmkkb.com/webopac/repository/proxy-roblox-hack-download_GM431946152.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_002_off00003072.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3072 26328 bytes
SHA-256: 3c11ae5c365d30380cbc7301abe904fbfacea5591b881f964a1338d882023168
font_01_sfnt_off00006a4b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6A4B 18176 bytes
SHA-256: 7a04ea1322d73f03f7683815be4e9f004787eae7d1b28008924f19d2df70de81

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