Malicious PDF — malware analysis report

Static analysis result for SHA-256 d62e55d5428df4f8…

MALICIOUS

PDF

48.6 KB Created: 2021-06-03 07:09:40 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-07
MD5: b477fdb0b4fe6fba24848702287ccdb2 SHA-1: 56d52506c495a816f590ea767b524e7eaaef965d SHA-256: d62e55d5428df4f8b4cbe6a897eada0d45db3241fa6678a9cb0a03c18bb9a822
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document is designed as a lure, promising game-related benefits like 'free robux' or 'game hacks'. It contains multiple links to malicious redirectors and other PDFs hosted on suspicious domains, indicating a multi-stage download or phishing attempt. The ML classifier strongly supports the malicious nature of this PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9796

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 https://netcdn.online/app/431946152/how-to-get-roblox-money-game-hack In PDF document text
    • http://www.taimaobi.com/admin/ckfinder/userfiles/files/where-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://www.taimaobi.com/admin/ckfinder/userfiles/files/pokemon-go-free-box_GM1094591345.pdfIn PDF document text
    • http://www.taimaobi.com/admin/ckfinder/userfiles/files/minecraft-xbox-free_GM479516143.pdfIn PDF document text
    • http://www.taimaobi.com/admin/ckfinder/userfiles/files/coin-master-free-spins-and-coins-hack_GM406889139.pdfIn PDF document text
    • http://www.taimaobi.com/admin/ckfinder/userfiles/files/daily-coin-master-free-spin-apk_GM406889139.pdfIn PDF document text
    • http://www.taimaobi.com/admin/ckfinder/userfiles/files/coin-master-links-to-get-free-spins_GM406889139.pdfIn PDF document text
    • http://www.taimaobi.com/admin/ckfinder/userfiles/files/codes-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://www.taimaobi.com/admin/ckfinder/userfiles/files/easy-robux-hack_GM431946152.pdfIn PDF document text
    • http://www.taimaobi.com/admin/ckfinder/userfiles/files/robux-free-2021_GM431946152.pdfIn PDF document text
    • http://www.taimaobi.com/admin/ckfinder/userfiles/files/coin-master-free-spins-2021_GM406889139.pdfIn PDF document text
    • http://www.taimaobi.com/admin/ckfinder/userfiles/files/coin-master-freebies_GM406889139.pdfIn PDF document text
    • http://www.taimaobi.com/admin/ckfinder/userfiles/files/roblox-mobile-hack_GM431946152.pdfIn PDF document text
    • http://www.taimaobi.com/admin/ckfinder/userfiles/files/how-to-get-hacks-on-minecraft_GM479516143.pdfIn PDF document text
    • http://www.taimaobi.com/admin/ckfinder/userfiles/files/coin-master-hack-activegamer_GM406889139.pdfIn PDF document text
    • http://www.taimaobi.com/admin/ckfinder/userfiles/files/free-robux-with-no-verification-2021_GM431946152.pdfIn PDF document text
    • http://www.taimaobi.com/admin/ckfinder/userfiles/files/roblox-com-hack_GM431946152.pdfIn PDF document text
    • http://www.taimaobi.com/admin/ckfinder/userfiles/files/get-free-likes-on-tiktok_GM835599320.pdfIn PDF document text
    • http://www.taimaobi.com/admin/ckfinder/userfiles/files/free-robux-no-email_GM431946152.pdfIn PDF document text
    • http://www.taimaobi.com/admin/ckfinder/userfiles/files/how-do-i-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://www.taimaobi.com/admin/ckfinder/userfiles/files/roblox-free-download_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000052cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x52CB 25812 bytes
SHA-256: 750de341ff7897399e4aa386e62d983446d6cc52564be13c8e0208a85727e95b
font_01_sfnt_off00008ecb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8ECB 3544 bytes
SHA-256: 0bd6a97e9aba961c3120e454ff6bc1a5c7c47b22c7363d2109141bc5d63ba9fd
font_02_sfnt_off00009aa1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9AA1 18428 bytes
SHA-256: c447f334fad9b15f432f5aac5fa8081b18071b5b9f1330fc1e6c33f3b8eba776

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