Malicious PDF — malware analysis report

Static analysis result for SHA-256 258c06ef4d76f103…

MALICIOUS

PDF

32.5 KB Created: 2021-06-19 23:49:14 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 6a53fd533f79af4bee83eada33f1dd55 SHA-1: 4236cece139cf8ee8e89f057907f6cacedd4db32 SHA-256: 258c06ef4d76f10396ab3fdec1626d450e1b181fdb1425b519e73b6e6f289102
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/free-roblox-accounts-game-hack PDF link annotation
    • https://c2o-library.net/catalog/repository/bloxawards-com-earn-free-robux_GM431946152.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/free-robux-live_GM431946152.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/free-bling-bling-card-coin-master_GM406889139.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/free-robux-app-real_GM431946152.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/how-to-get-free-roblox-gift-cards_GM431946152.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/free-robux-generator-download-app_GM431946152.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/coin-master-free-coins_GM406889139.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/coin-master-100-spin-slot_GM406889139.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/can-you-give-me-free-robux_GM431946152.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/coin-master-free-spin-trick_GM406889139.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/roblox-comroblox_GM431946152.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/free-tiktok-likes-and-followers_GM835599320.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/robloxhacks_GM431946152.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/free-coin-coin-master_GM406889139.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/roblox-hack-2021_GM431946152.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/coin-master-free-spin-realme-products_GM406889139.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/free-robux-with-no-app-download_GM431946152.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/how-to-cheat-in-roblox_GM431946152.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/how-to-hack-atms-in-roblox-libertay-county_GM431946152.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/coin-master-hacks-iphone_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_off00002c7d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2C7D 21012 bytes
SHA-256: 5a0190c418d82fe13c463583bb80f934668e6e487917a042fbb0d2ea6c6321a7
font_01_sfnt_off00005a1c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5A1C 18896 bytes
SHA-256: dca2f27ecdd8c5a39a81753fb954dd30ae74f07dc947ace6cc80d7c98cb68ba8

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