Malicious PDF — malware analysis report

Static analysis result for SHA-256 d9fdde8c17ce50a9…

MALICIOUS

PDF

45.4 KB Created: 2021-06-03 22:55:27 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 165ee1d98936d9c68f395b0faa7545f9 SHA-1: 7384ce160009b94f3d707d85fc097e1635d6682c SHA-256: d9fdde8c17ce50a90029766b836159de6b2ba816a6f9cdd78bf881b8afdd3452
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document employs a lure related to game hacks and free generators, directing users to malicious redirector infrastructure. The primary malicious link identified is https://netcdn.online/app/406889139/how-to-hack-coin-master-game-hack. While no scripts were explicitly extracted, the PDF structure and embedded URLs strongly suggest a phishing or redirection attack, likely intended to lead users to further malicious content or downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9804

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/406889139/how-to-hack-coin-master-game-hack In PDF document text
    • http://perpus.i2s-learning.com/repository/how-to-hack-robux_GM431946152.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/free-robux-working_GM431946152.pdfIn PDF document text
    • http://perpus.i2s-learning.com//repository/coin-master-free-spins-2021_GM406889139.pdfIn PDF document text
    • http://perpus.i2s-learning.com//repository/coin-master-free-spins-link-2021-download_GM406889139.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/coin-master-golden-cards-hack_GM406889139.pdfIn PDF document text
    • http://perpus.i2s-learning.com//repository/fb-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/free-robux-generator-without-human-verification_GM431946152.pdfIn PDF document text
    • http://perpus.i2s-learning.com//repository/free-custom-minecraft-skins_GM479516143.pdfIn PDF document text
    • http://perpus.i2s-learning.com//repository/microsoft-rewards-robux_GM431946152.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/hacks-para-roblox_GM431946152.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/coin-master-free-spins-and-coins-for-iphone_GM406889139.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/how-to-get-free-spins-on-coin-master-without-verification_GM406889139.pdfIn PDF document text
    • http://perpus.i2s-learning.com//repository/coin-master-hack-tool-india_GM406889139.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/free-spin-coin-master-link-2021_GM406889139.pdfIn PDF document text
    • http://perpus.i2s-learning.com//repository/coin-master-free-spins-link-today-new-2021_GM406889139.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/coin-master-cards-hack-2021_GM406889139.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/how-to-get-free-pet-snacks-in-coin-master_GM406889139.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/how-to-get-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/roblox-free-robux-website_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_off00004e4b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4E4B 24460 bytes
SHA-256: 08c78d5bef42bffa36448cc2a9cdbb20b8e795deded328bf596b8ca3f6bb208b
font_01_sfnt_off00008588.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8588 2880 bytes
SHA-256: b053084cafd01c649462d87667ba56c569d6480ce60e7d20ae57ef6124cf178e
font_02_sfnt_off00008f72.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8F72 17880 bytes
SHA-256: 811ddb8557bc0f5be85009fa6d5ae0baa2b7fc09c58d91c5790597872cecd122

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