Malicious PDF — malware analysis report

Static analysis result for SHA-256 6d2ff6255b98dab7…

MALICIOUS

PDF

33.4 KB Created: 2021-06-27 05:15:49 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-24
MD5: bd3aa53e2a6a8d71b700594071ddc91b SHA-1: 7647c01f840d80ed05a11be9cfad18671af8e7de SHA-256: 6d2ff6255b98dab7b911c0ad4deba81b32da82a6f4b3f80dfe21df5fece574cc
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links to a known malicious redirector infrastructure, specifically advertising 'free Robux' and game hacks. The primary lure URL is http://netcdn.co/app/431946152/free-robux-no-task-game-hack. The document's content and embedded URLs strongly suggest a phishing or scam attempt designed to lead users to potentially malicious sites. No scripts were extracted, but the presence of multiple malicious links is a high-confidence indicator.

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/free-robux-no-task-game-hack In PDF document text
    • https://key8013805.com.tw/upload/files/coin-master-card-hack-app_GM406889139.pdfIn PDF document text
    • https://key8013805.com.tw/upload/files/how-to-get-robux-on-roblox-for-free-download_GM431946152.pdfIn PDF document text
    • https://key8013805.com.tw/upload/files/free-robux-no-download-no-verification_GM431946152.pdfIn PDF document text
    • https://key8013805.com.tw/upload/files/how-to-hack-coin-master-apple_GM406889139.pdfIn PDF document text
    • https://key8013805.com.tw/upload/files/minecraft-free-install_GM479516143.pdfIn PDF document text
    • https://key8013805.com.tw/upload/files/roblox-free-giveaway_GM431946152.pdfIn PDF document text
    • https://key8013805.com.tw/upload/files/free-coin-link-coin-master_GM406889139.pdfIn PDF document text
    • https://key8013805.com.tw/upload/files/how-to-get-free-robux-groups_GM431946152.pdfIn PDF document text
    • https://key8013805.com.tw/upload/files/coin-master-free-spin-bonus_GM406889139.pdfIn PDF document text
    • https://key8013805.com.tw/upload/files/free-coin-master-links_GM406889139.pdfIn PDF document text
    • https://key8013805.com.tw/upload/files/hack-master-coin-pc_GM406889139.pdfIn PDF document text
    • https://key8013805.com.tw/upload/files/how-to-get-minecraft-for-free-on-mac_GM479516143.pdfIn PDF document text
    • https://key8013805.com.tw/upload/files/minecraft-menu_GM479516143.pdfIn PDF document text
    • https://key8013805.com.tw/upload/files/coin-master-free-spins-app_GM406889139.pdfIn PDF document text
    • https://key8013805.com.tw/upload/files/100-free-spins-for-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://key8013805.com.tw/upload/files/urban-network-robux-hack_GM431946152.pdfIn PDF document text
    • https://key8013805.com.tw/upload/files/roblox-games-com-free_GM431946152.pdfIn PDF document text
    • https://key8013805.com.tw/upload/files/roblox-hack-website-no-survey_GM431946152.pdfIn PDF document text
    • https://key8013805.com.tw/upload/files/roblox-rape-hack_GM431946152.pdfIn PDF document text
    • https://key8013805.com.tw/upload/files/coin-master-hack-2021-android_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_off00002c73.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2C73 22152 bytes
SHA-256: ec38b1488859564ceb4637db92daa996ca92e540ff3107d2af28859ce1d9f2f1
font_01_sfnt_off00005de4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5DE4 18884 bytes
SHA-256: 590bf02ae02b805644cdc76b6aaa4475e75ade552b7315213351207d1398049f

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