Malicious PDF — malware analysis report

Static analysis result for SHA-256 a13630df068db43a…

MALICIOUS

PDF

45.5 KB Created: 2021-06-03 08:15:49 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-04
MD5: bfe3e46e1d9fc404b06bb1e0a350e461 SHA-1: 9f98f933f68ef7ae6b9767e4d742def841105324 SHA-256: a13630df068db43a7fa5236d04de234f91304d34f4cf8a90ce204ddf054981f1
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 0.9864

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/431946152/microsoft-free-robux-game-hack PDF link annotation
    • http://www.js100.com/uploads/ckeditor/files/coin-master-free-rare-cards_GM406889139.pdfIn PDF document text
    • http://www.js100.com/uploads/ckeditor/files/master-coin-free-link_GM406889139.pdfIn PDF document text
    • http://www.js100.com/uploads/ckeditor/files/how-to-get-minecraft-for-free-on-your-phone_GM479516143.pdfIn PDF document text
    • http://www.js100.com/uploads/ckeditor/files/roblox-free-robux-website_GM431946152.pdfIn PDF document text
    • http://www.js100.com/uploads/ckeditor/files/coin-master-free-spins-11-01-2021_GM406889139.pdfIn PDF document text
    • http://www.js100.com/uploads/ckeditor/files/roblox-dominus-free_GM431946152.pdfIn PDF document text
    • http://www.js100.com/uploads/ckeditor/files/pokemon-go-free-balls-2021_GM1094591345.pdfIn PDF document text
    • http://www.js100.com/uploads/ckeditor/files/pubg-uc-980_GM1330123889.pdfIn PDF document text
    • http://www.js100.com/uploads/ckeditor/files/free-coins-coin-master-ios_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/inappropriate-roblox-games-2021_GM431946152.pdfIn PDF document text
    • http://www.js100.com/uploads/ckeditor/files/robux-hack-tools_GM431946152.pdfIn PDF document text
    • http://www.js100.com/uploads/ckeditor/files/how-to-get-minecraft-bedrock-edition-on-pc-for-free_GM479516143.pdfIn PDF document text
    • http://www.js100.com/uploads/ckeditor/files/free-robux-2021_GM431946152.pdfIn PDF document text
    • http://www.js100.com/uploads/ckeditor/files/free-spins-from-coin-master_GM406889139.pdfIn PDF document text
    • http://www.js100.com/uploads/ckeditor/files/robux-cheat_GM431946152.pdfIn PDF document text
    • http://www.js100.com/uploads/ckeditor/files/pokemon-go-free-or-gotcha_GM1094591345.pdfIn PDF document text
    • http://www.js100.com/uploads/ckeditor/files/cmaster-club-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://www.js100.com/uploads/ckeditor/files/how-to-get-free-minecraft-skins_GM479516143.pdfIn PDF document text
    • http://www.js100.com/uploads/ckeditor/files/where-to-get-robux_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_off0000500e.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x500E 25084 bytes
SHA-256: 32e020f8db9c0f0e42e7a1b876919a109edd1317e3a2142cc24c43eea909e7fd
font_01_sfnt_off00008a5b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8A5B 19988 bytes
SHA-256: d4d4423c81764cd6a69e0be1ccc1520eee8d99db4ce7b228ba7d96bb55ea0c5e

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