Malicious PDF — malware analysis report

Static analysis result for SHA-256 d42f7b8cf18d186a…

MALICIOUS

PDF

35.3 KB Created: 2021-06-26 04:41:03 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 6e002c4b89baf1d65a92e472a3d64e1a SHA-1: 3cd533d609d421cce3e0d6618dd0b738d1615e71 SHA-256: d42f7b8cf18d186af9d7932be61e076d3e88f4a2c844a6011043a21a77bd2ef6
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links to known malicious redirectors and infrastructure, disguised as game hacks and free currency generators. The primary malicious URL identified is http://netcdn.co/app/431946152/roblox-follow-flamingo-hack-game-hack. The document body and embedded links suggest a social engineering lure to trick users into visiting these sites, which likely serve as a gateway to further malicious content or phishing pages. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector critical 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. CRITICAL on its own: the /app/<id>/<slug>-game-hack path shape is unambiguous scam infra, and the host rotates so a host-list match can't be relied on.
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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
  • 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/roblox-follow-flamingo-hack-game-hack In PDF document text
    • http://www.elibrary.fl.unud.ac.id/repository/how-to-hack-roblox-with-cheat-engine-2021_GM431946152.pdfIn PDF document text
    • http://www.elibrary.fl.unud.ac.id/repository/promo-codes-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://www.elibrary.fl.unud.ac.id/repository/free-robux-app-2021_GM431946152.pdfIn PDF document text
    • http://elibrary.fl.unud.ac.id/repository/comment-hacker-roblox-jailbreak-youtube_GM431946152.pdfIn PDF document text
    • http://elibrary.fl.unud.ac.id/repository/hack-mod-of-roblox_GM431946152.pdfIn PDF document text
    • http://www.elibrary.fl.unud.ac.id/repository/real-free-robux-codes_GM431946152.pdfIn PDF document text
    • http://www.elibrary.fl.unud.ac.id/repository/hack-coin-master-app-ios_GM406889139.pdfIn PDF document text
    • http://elibrary.fl.unud.ac.id/repository/cube-eat-cube-roblox-cheats_GM431946152.pdfIn PDF document text
    • http://elibrary.fl.unud.ac.id/repository/free-spins-on-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://www.elibrary.fl.unud.ac.id/repository/coin-master-spin-link-today-free_GM406889139.pdfIn PDF document text
    • http://www.elibrary.fl.unud.ac.id/repository/how-to-install-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://www.elibrary.fl.unud.ac.id/repository/roblox-games-with-free-boombox_GM431946152.pdfIn PDF document text
    • http://www.elibrary.fl.unud.ac.id/repository/how-to-get-free-robux-easy-2021_GM431946152.pdfIn PDF document text
    • http://elibrary.fl.unud.ac.id/repository/how-to-get-free-robux-codes-2021_GM431946152.pdfIn PDF document text
    • http://elibrary.fl.unud.ac.id/repository/free-robux-com-real_GM431946152.pdfIn PDF document text
    • http://elibrary.fl.unud.ac.id/repository/roblox-email-reset-hack_GM431946152.pdfIn PDF document text
    • http://elibrary.fl.unud.ac.id/repository/free-robux-gift-card-codes_GM431946152.pdfIn PDF document text
    • http://elibrary.fl.unud.ac.id/repository/roblox-hack-account-script_GM431946152.pdfIn PDF document text
    • http://elibrary.fl.unud.ac.id/repository/coin-master-hack-september-2021_GM406889139.pdfIn PDF document text
    • http://elibrary.fl.unud.ac.id/repository/hack-free-spin-coin-master_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_off00003394.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3394 22044 bytes
SHA-256: 603f965cc0bb1264a0c5b81bac92735b945d7fe6e07dd01d8d6fb34f82c8732a
font_01_sfnt_off0000643e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x643E 19364 bytes
SHA-256: ef2e8bdbe94acd71bcc49f36383dd85c30b23e9c56c2e1bbf23384a9f5aca340

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