Malicious PDF — malware analysis report

Static analysis result for SHA-256 c8ca077fcd194cfd…

MALICIOUS

PDF

34.2 KB Created: 2021-07-05 07:23:53 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: ebaa4e60e212eb333a9fd0822bd0f06a SHA-1: 21f2f29c76a6bce8cc7157194044dd9d5933a12b SHA-256: c8ca077fcd194cfd8e81b9f2df6a7f7ec07b23110b230cbd51fdda0cea00fab8
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/431946152/roblox-prison-life-hack-game-hack PDF link annotation
    • http://librarysenior.com//repository/coin-master-free-spins-generator-no-verification_GM406889139.pdfIn PDF document text
    • http://librarysenior.com//repository/free-robux-promo-codes-2021_GM431946152.pdfIn PDF document text
    • http://librarysenior.com//repository/haktuts-coin-master-free-daily-spins_GM406889139.pdfIn PDF document text
    • http://librarysenior.com/repository/how-to-earn-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://librarysenior.com/repository/coin-master-hack-no-survey-or-verification_GM406889139.pdfIn PDF document text
    • http://librarysenior.com//repository/how-to-make-a-minecraft-bedrock-server-for-free_GM479516143.pdfIn PDF document text
    • http://librarysenior.com//repository/how-do-u-get-free-robux_GM431946152.pdfIn PDF document text
    • http://librarysenior.com//repository/minecraft-education-edition-free-download_GM479516143.pdfIn PDF document text
    • http://librarysenior.com//repository/block-best-robux_GM431946152.pdfIn PDF document text
    • http://librarysenior.com//repository/flip-master-coins-hack_GM406889139.pdfIn PDF document text
    • http://librarysenior.com/repository/minecraft-client_GM479516143.pdfIn PDF document text
    • http://librarysenior.com/repository/cwis-free-robux-gen-version-30-updated_GM431946152.pdfIn PDF document text
    • http://librarysenior.com/repository/2021-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://librarysenior.com//repository/coin-master-free-spins-2021-generator_GM406889139.pdfIn PDF document text
    • http://librarysenior.com//repository/coin-master-hack-programers_GM406889139.pdfIn PDF document text
    • http://librarysenior.com/repository/free-coins-and-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://librarysenior.com//repository/robux-hack-2021_GM431946152.pdfIn PDF document text
    • http://librarysenior.com//repository/minecraft-building-hacks_GM479516143.pdfIn PDF document text
    • http://librarysenior.com/repository/how-to-get-free-cards-sets-for-coin-master_GM406889139.pdfIn PDF document text
    • http://librarysenior.com/repository/how-to-get-free-robux-in-2021_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
font_00_sfnt_off00003076.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3076 21956 bytes
SHA-256: b9b0351209bba1f4682b6d83e77a7462efbf252e849579e7e8836463d8a9d7ac
font_01_sfnt_off000060fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x60FC 18932 bytes
SHA-256: 757c592a10e4627f90624bfdd8f1127ea4c0f8f917493ad00ff1bc4f9e7f3eb7

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