Malicious PDF — malware analysis report

Static analysis result for SHA-256 850be0f66da4c111…

MALICIOUS

PDF

35.5 KB Created: 2021-07-05 23:43:46 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: a203a52d729d1b717b083d622d5b9fcf SHA-1: dd67dc7f3c1c4c6ab150675f0cb9a1813a2d4e11 SHA-256: 850be0f66da4c111fc7ec74e3af30e1e7242720369d3333a88f6226342012bc1
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/robloxmatchcom-free-robux-game-hack PDF link annotation
    • http://www.library.gkigadingserpong.org/repository/free-robux-without-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/coin-master-free-spins-iphone_GM406889139.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/regular-roblox-free-robux_GM431946152.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/game-hunters-coin-master_GM406889139.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/how-to-get-free-spins-on-coin-master-2021-links_GM406889139.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/roblox-games-that-give-you-free-robux_GM431946152.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/coin-master-free-account_GM406889139.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/minecraft-world-free-download_GM479516143.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/how-to-get-actually-free-robux_GM431946152.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/how-to-get-java-minecraft-free_GM479516143.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/how-to-get-free-robux-without-downloading-apps_GM431946152.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/make-free-robux_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/roblox-adopt-me-money-hack-2021-script_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/roblox-dragon-fury-hack_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/case-clicker-roblox-money-hack_GM431946152.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/robux-websites-2021_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/hack-roblox-download_GM431946152.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/how-to-get-free-things-in-roblox-2021_GM431946152.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/coin-master-heaven-free-spins-today_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_off00003289.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3289 23036 bytes
SHA-256: d6048c246c7af04af409c175609d4710ebeb4df56c511d99cb2e3cf333e851e2
font_01_sfnt_off000064fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x64FB 19320 bytes
SHA-256: 0d578fc51ad0f188a9c4505a85014dba64e81475c3b1c73d40a415d6db3d1745

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