Malicious PDF — malware analysis report

Static analysis result for SHA-256 e3bf1600eba93a2e…

MALICIOUS

PDF

43.9 KB Created: 2021-06-03 22:03:24 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 2566562396dfaa0fd49ed5274f49dc11 SHA-1: ffefb36d4022c6d7c81bf66c231a8dc944c4cc08 SHA-256: e3bf1600eba93a2e0eceaa672e52defee5a44272bae40a7dea2ae417e1e495d7
160 Risk Score

Malware Insights

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

The PDF contains multiple links to known malicious redirectors, disguised as 'free generators' or 'game hacks' for popular games. The primary lure URL is https://netcdn.online/app/479516143/free-minecraft-capes-no-mods-game-hack, which is designed to trick users into clicking through to potentially harmful content. While no scripts were explicitly extracted, the PDF structure and embedded URLs strongly suggest a social engineering attack aimed at driving traffic to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

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/479516143/free-minecraft-capes-no-mods-game-hack In PDF document text
    • http://www.js100.com/uploads/ckeditor/files/coin-master-free-spin-link-today-50_GM406889139.pdfIn PDF document text
    • http://www.js100.com/uploads/ckeditor/files/free-tiktok-followers-and-likes_GM835599320.pdfIn PDF document text
    • http://www.js100.com/uploads/ckeditor/files/strucid-aimbot_GM431946152.pdfIn PDF document text
    • http://www.js100.com/uploads/ckeditor/files/roblox-free-wings_GM431946152.pdfIn PDF document text
    • http://www.js100.com/uploads/ckeditor/files/how-to-hack-a-minecraft-server_GM479516143.pdfIn PDF document text
    • http://www.js100.com/uploads/ckeditor/files/pokemon-go-free-storage-upgrade_GM1094591345.pdfIn PDF document text
    • http://www.js100.com/uploads/ckeditor/files/is-minecraft-free-on-pc_GM479516143.pdfIn PDF document text
    • http://www.js100.com/uploads/ckeditor/files/rbl-gg-free-robux_GM431946152.pdfIn PDF document text
    • http://www.js100.com/uploads/ckeditor/files/hack-coin-master-8-ball-pool_GM406889139.pdfIn PDF document text
    • http://www.js100.com/uploads/ckeditor/files/roblox-hacked-com-2021_GM431946152.pdfIn PDF document text
    • http://www.js100.com/uploads/ckeditor/files/how-to-get-free-skins-in-minecraft_GM479516143.pdfIn PDF document text
    • http://www.js100.com/uploads/ckeditor/files/how-to-get-free-robux-com_GM431946152.pdfIn PDF document text
    • http://www.js100.com/uploads/ckeditor/files/free-spins-and-coins-coin-master-app_GM406889139.pdfIn PDF document text
    • http://www.js100.com/uploads/ckeditor/files/pubg-uc-hack-app_GM1330123889.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/coin-master-card-collection-hack_GM406889139.pdfIn PDF document text
    • http://www.js100.com/uploads/ckeditor/files/coin-master-daily-free-spins-haktuts_GM406889139.pdfIn PDF document text
    • http://www.js100.com/uploads/ckeditor/files/free-robux-obby-2021_GM431946152.pdfIn PDF document text
    • http://www.js100.com/uploads/ckeditor/files/free-robux-generator-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://www.js100.com/uploads/ckeditor/files/coin-master-map_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_off000052d8.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x52D8 24684 bytes
SHA-256: 1d9f407b308808516f1fdef29df106499a9e64adbf578cb55d09edc53ecff7b3
font_01_sfnt_off000089cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x89CC 18060 bytes
SHA-256: d2580fb4aafe993e5dab330080fdbce20cb4b143aeb227db28560abf8afc6474

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