Malicious PDF — malware analysis report

Static analysis result for SHA-256 226bfa9526881f2e…

MALICIOUS

PDF

48.8 KB Created: 2021-06-13 15:43:30 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 861b3489b3aca02fb710536f8c1d19e1 SHA-1: a98eadb9189823d3b8b3e2e42fff4b76cf0d5b01 SHA-256: 226bfa9526881f2e02f76ddf94ab1a756208978bec0123e47b52225702c76db3
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 http://netcdn.co/app/431946152/red-boy-hack-roblox-download-game-hack PDF link annotation
    • http://library.itekes-bali.ac.id/repository/easy-ways-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/best-free-exploit-roblox_GM431946152.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/free-roblox-accounts-with-robux-that-work-not-banned-2021_GM431946152.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/100-free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/coin-master-cheat-codes_GM406889139.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/pubg-uc-seller-pakistan_GM1330123889.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/coin-master-spin-free_GM406889139.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/coin-master-card-collection-link_GM406889139.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/coin-master-hack-xyz_GM406889139.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/how-to-play-roblox-for-free_GM431946152.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/coin-free-spin_GM406889139.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/fb-coin-master-free-spins-link_GM406889139.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/free-spin-coin-master-game_GM406889139.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/roblox-prison-life-cheat-codes_GM431946152.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/minecraft-pe-free-apk_GM479516143.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/free-robux-that-actually-works-2021_GM431946152.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/coin-master-claim-free-spins_GM406889139.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/500-free-coin-master-spins_GM406889139.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/best-hacks-for-frappe-roblox_GM431946152.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/free-robux-script_GM431946152.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_off00005331.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5331 25064 bytes
SHA-256: 6cff9ee1b014d1555b29e66f2f017cf90f0baec1e884715e9b98226f10f69b88
font_01_sfnt_off00008d43.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8D43 3624 bytes
SHA-256: 716afe371d889074200e4c4c1757936b6f8714d8673385c0dbf2f93fa142995c
font_02_sfnt_off00009a09.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9A09 18868 bytes
SHA-256: d59aab64873fd90dd7472de1f0a1358b1d22ef26cef49cb65a1fdb46a214177a

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