Malicious PDF — malware analysis report

Static analysis result for SHA-256 7cbf6eb355ee7dcd…

MALICIOUS

PDF

34.9 KB Created: 2021-07-06 06:57:52 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-18
MD5: b5b56ca43eee394f423484084c03c9c8 SHA-1: ab356f9017a43a045ec919a00c37e59d024edaab SHA-256: 7cbf6eb355ee7dcdf935e2adabd5bed45ca3680585b29cb50f526d2e2fbd16e3
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/free-robux-generator-game-hack PDF link annotation
    • https://opac.heritagejkt.org/repository/robux-hack-site-robloxcom_GM431946152.pdfIn PDF document text
    • https://opac.heritagejkt.org/repository/how-to-hack-a-roblox-account-2021-synapse_GM431946152.pdfIn PDF document text
    • https://opac.heritagejkt.org/repository/how-do-you-get-free-roblox-skins_GM431946152.pdfIn PDF document text
    • https://opac.heritagejkt.org/repository/free-robux-website_GM431946152.pdfIn PDF document text
    • https://opac.heritagejkt.org/repository/free-promo-codes-for-robux_GM431946152.pdfIn PDF document text
    • https://opac.heritagejkt.org/repository/free-robux-in-a-sec_GM431946152.pdfIn PDF document text
    • https://opac.heritagejkt.org/repository/free-roblox-bazooka_GM431946152.pdfIn PDF document text
    • https://opac.heritagejkt.org//repository/how-to-hack-coin-master-spin-in-hindi_GM406889139.pdfIn PDF document text
    • https://opac.heritagejkt.org/repository/300m-free-robux_GM431946152.pdfIn PDF document text
    • https://opac.heritagejkt.org//repository/free-robux-2021_GM431946152.pdfIn PDF document text
    • https://opac.heritagejkt.org/repository/roblox-comroblox_GM431946152.pdfIn PDF document text
    • https://opac.heritagejkt.org/repository/roblox-freebies-hack-robux_GM431946152.pdfIn PDF document text
    • https://opac.heritagejkt.org//repository/how-to-hack-roblox-2021_GM431946152.pdfIn PDF document text
    • https://opac.heritagejkt.org/repository/kuso-icu-roblox-hack_GM431946152.pdfIn PDF document text
    • https://opac.heritagejkt.org/repository/does-cheat-engine-work-on-roblox_GM431946152.pdfIn PDF document text
    • https://opac.heritagejkt.org/repository/coin-master-free-spin-realme-products_GM406889139.pdfIn PDF document text
    • https://opac.heritagejkt.org/repository/how-to-get-free-coins-in-coin-master-game_GM406889139.pdfIn PDF document text
    • https://opac.heritagejkt.org/repository/how-to-hack-and-become-higher-rank-roblox-d-day_GM431946152.pdfIn PDF document text
    • https://opac.heritagejkt.org//repository/blox-fun-info_GM431946152.pdfIn PDF document text
    • https://opac.heritagejkt.org/repository/free-spins-coin-master-no-verification_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_off00003096.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3096 22812 bytes
SHA-256: 994ebd06d1eecdb326794ad3b3279a8f971137f147538c2c5114040d88b76225
font_01_sfnt_off000063d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x63D0 18820 bytes
SHA-256: da2f915db23b41a878f83961178ff4e79d82bfec54ff52f4ca014625624765bc

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