Malicious PDF — malware analysis report

Static analysis result for SHA-256 75e20eca195e00a2…

MALICIOUS

PDF

46.8 KB Created: 2021-06-03 22:04:25 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 6c5c1ba724787c496cf240b1fd2e0a59 SHA-1: b5977a554fecd7ff4bcf4758c5f9d8b1b1e95ff6 SHA-256: 75e20eca195e00a203b748b50d39551270e45e93e6743ea5055851f31e2c4c00
160 Risk Score

Malware Insights

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

This PDF document contains multiple links designed to lure users into clicking on what appears to be a 'free generator' or 'game hack'. The primary link, https://netcdn.online/app/431946152/spam-click-free-robux-script-v3rmillion-game-hack, is identified as a malicious redirector. The document body, though heavily obfuscated, contains references to game hacks and free currency, reinforcing the lure. The presence of embedded URLs and the ML classifier's high confidence score indicate a malicious intent to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9832

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/spam-click-free-robux-script-v3rmillion-game-hack In PDF document text
    • http://www.js100.com/uploads/ckeditor/files/roblox-hack-site_GM431946152.pdfIn PDF document text
    • http://www.js100.com/uploads/ckeditor/files/is-it-possible-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://www.js100.com/uploads/ckeditor/files/free-robux-card-codes_GM431946152.pdfIn PDF document text
    • http://www.js100.com/uploads/ckeditor/files/free-coins-and-spins-for-coin-master-game_GM406889139.pdfIn PDF document text
    • http://www.js100.com/uploads/ckeditor/files/coin-master-hack-2021-ios_GM406889139.pdfIn PDF document text
    • http://www.js100.com/uploads/ckeditor/files/minecraft-education-free_GM479516143.pdfIn PDF document text
    • http://www.js100.com/uploads/ckeditor/files/free-spin-coin-master-link-2021_GM406889139.pdfIn PDF document text
    • http://www.js100.com/uploads/ckeditor/files/how-to-get-free-robux-no-verification_GM431946152.pdfIn PDF document text
    • http://www.js100.com/uploads/ckeditor/files/free-tiktok-followers-no-survey_GM835599320.pdfIn PDF document text
    • http://www.js100.com/uploads/ckeditor/files/free-robux-games-that-actually-work_GM431946152.pdfIn PDF document text
    • http://www.js100.com/uploads/ckeditor/files/minecraft-pocket-edition-mods-for-free_GM479516143.pdfIn PDF document text
    • http://www.js100.com/uploads/ckeditor/files/roblox-games-to-play-for-free_GM431946152.pdfIn PDF document text
    • http://www.js100.com/uploads/ckeditor/files/coin-master-free-attack-hack_GM406889139.pdfIn PDF document text
    • http://www.js100.com/uploads/ckeditor/files/minecraft-windows-10-mod-menu_GM479516143.pdfIn PDF document text
    • http://www.js100.com/uploads/ckeditor/files/free-minecraft-svg-cutting-files_GM479516143.pdfIn PDF document text
    • http://www.js100.com/uploads/ckeditor/files/minecraft-bedrock-edition-hacks_GM479516143.pdfIn PDF document text
    • http://www.js100.com/uploads/ckeditor/files/coin-master-time-hack_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/free-robux-obby_GM431946152.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_off0000528b.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x528B 27476 bytes
SHA-256: 2a989a78310650b36e0e33e17dd31d14512bb384f48bb0165f849eb87053da75
font_01_sfnt_off00009101.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9101 19456 bytes
SHA-256: e262b2f6459d9a569c86764756339d6d85af6e4b890528e291d8d6ba0e8aa9a2

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