Malicious PDF — malware analysis report

Static analysis result for SHA-256 48e73d664ea94b1f…

MALICIOUS

PDF

44.3 KB Created: 2021-06-03 21:59:44 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 90eeaad63878ddf536069f165ff6422d SHA-1: 1d8a5c26cce79e2c9e72036fb499175d4d979147 SHA-256: 48e73d664ea94b1fe2af36514cacc6d0708ca263758abd17a1bac775fdc41f52
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

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 0.9865

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 https://netcdn.online/app/479516143/how-do-you-hack-minecraft-game-hack PDF link annotation
    • http://www.js100.com/uploads/ckeditor/files/free-roblox-accounts-with-robux_GM431946152.pdfIn PDF document text
    • http://www.js100.com/uploads/ckeditor/files/free-robux-without-downloading-apps_GM431946152.pdfIn PDF document text
    • http://www.js100.com/uploads/ckeditor/files/how-to-hack-a-roblox-account-2021_GM431946152.pdfIn PDF document text
    • http://www.js100.com/uploads/ckeditor/files/moon-static-coin-master-generator-hacks-free_GM406889139.pdfIn PDF document text
    • http://www.js100.com/uploads/ckeditor/files/coin-master-hack-download-apk_GM406889139.pdfIn PDF document text
    • http://www.js100.com/uploads/ckeditor/files/how-to-get-free-robux-for-kids_GM431946152.pdfIn PDF document text
    • http://www.js100.com/uploads/ckeditor/files/how-to-get-more-robux-for-free_GM431946152.pdfIn PDF document text
    • http://www.js100.com/uploads/ckeditor/files/coin-master-free-cards_GM406889139.pdfIn PDF document text
    • http://www.js100.com/uploads/ckeditor/files/free-spins-coin-master-2021-glitch_GM406889139.pdfIn PDF document text
    • http://www.js100.com/uploads/ckeditor/files/coin-master-free-spins-23-march-2021_GM406889139.pdfIn PDF document text
    • http://www.js100.com/uploads/ckeditor/files/fb-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://www.js100.com/uploads/ckeditor/files/minecraft-items_GM479516143.pdfIn PDF document text
    • http://www.js100.com/uploads/ckeditor/files/minecraft-java-account-free_GM479516143.pdfIn PDF document text
    • http://www.js100.com/uploads/ckeditor/files/how-to-get-free-robux-no-survey_GM431946152.pdfIn PDF document text
    • http://www.js100.com/uploads/ckeditor/files/free-roblox-injector_GM431946152.pdfIn PDF document text
    • http://www.js100.com/uploads/ckeditor/files/free-spins-coin-master-2021-no-verification_GM406889139.pdfIn PDF document text
    • http://www.js100.com/uploads/ckeditor/files/hack-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://www.js100.com/uploads/ckeditor/files/guide--coin-master-free-tips_GM406889139.pdfIn PDF document text
    • http://www.js100.com/uploads/ckeditor/files/coin-master-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • http://www.js100.com/uploads/ckeditor/files/how-many-levels-are-in-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
stream_004_off0000514e.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x514E 24624 bytes
SHA-256: aefad0c359f0a6e205eee8e7525aa37a598183446b79114f60f0a652f7d5da15
font_01_sfnt_off000089e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x89E4 18512 bytes
SHA-256: 3291eec6b86d740bab8ba76643ef34913a0c4ab2a930ce2f65b8b3fd60c7ead6

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