Malicious PDF — malware analysis report

Static analysis result for SHA-256 50d50ed20c28511e…

MALICIOUS

PDF

33.6 KB Created: 2021-07-06 08:01:56 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 8282aafcb6fd9121faeefeeb1656d5cf SHA-1: c051168976b36edc4421584caa119c469d394d24 SHA-256: 50d50ed20c28511e7d3df3e8df9234cedce6a61c21cef0d28e702ee7f74f6467
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/www-roblox-com-robux-game-hack PDF link annotation
    • http://lib.icbc-indonesia.org/repository/how-to-get-roblox-premium-for-free-2021_GM431946152.pdfIn PDF document text
    • http://lib.icbc-indonesia.org/repository/how-to-get-free-robux-on-pc-2021_GM431946152.pdfIn PDF document text
    • http://lib.icbc-indonesia.org/repository/coin-master-free-spins-link-no-verification_GM406889139.pdfIn PDF document text
    • http://lib.icbc-indonesia.org/repository/how-to-get-free-roblox-money_GM431946152.pdfIn PDF document text
    • http://lib.icbc-indonesia.org//repository/how-to-get-free-robux-on-mobile_GM431946152.pdfIn PDF document text
    • http://lib.icbc-indonesia.org/repository/how-to-get-free-robux-easy-2021_GM431946152.pdfIn PDF document text
    • http://lib.icbc-indonesia.org/repository/no-loading-how-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.icbc-indonesia.org/repository/free-clothing-on-roblox_GM431946152.pdfIn PDF document text
    • http://lib.icbc-indonesia.org/repository/easy-ways-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.icbc-indonesia.org/repository/how-to-get-free-stuff-roblox_GM431946152.pdfIn PDF document text
    • http://lib.icbc-indonesia.org/repository/skin-for-roblox-free-gucci_GM431946152.pdfIn PDF document text
    • http://lib.icbc-indonesia.org/repository/roblox-skins-free-downoad_GM431946152.pdfIn PDF document text
    • http://lib.icbc-indonesia.org/repository/hacked-roblox-game_GM431946152.pdfIn PDF document text
    • http://lib.icbc-indonesia.org/repository/roblox-rocitizens-cheat-codes_GM431946152.pdfIn PDF document text
    • http://lib.icbc-indonesia.org/repository/free-roblox-hackl-2021_GM431946152.pdfIn PDF document text
    • http://lib.icbc-indonesia.org/repository/robux-claimer_GM431946152.pdfIn PDF document text
    • http://lib.icbc-indonesia.org//repository/coin-master-today_GM406889139.pdfIn PDF document text
    • http://lib.icbc-indonesia.org/repository/mcdonaldsville-roblox-hack-script_GM431946152.pdfIn PDF document text
    • http://lib.icbc-indonesia.org/repository/cowboy-tshirt-roblox-free_GM431946152.pdfIn PDF document text
    • http://lib.icbc-indonesia.org//repository/give-me-robux_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_off00002d7e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2D7E 21792 bytes
SHA-256: d1c43ee925ce6934da175ed6254582407e94428b59952cf94a50bed9988ef05d
font_01_sfnt_off00005d8b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5D8B 19248 bytes
SHA-256: 648b9b335c43128e3547428391492330faab3f1ca92414a97b8e95085ba86d19

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