Malicious PDF — malware analysis report

Static analysis result for SHA-256 c100bb2fe96f7426…

MALICIOUS

PDF

46.6 KB Created: 2021-06-03 22:05:35 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 5070f8df24c2d2969e0f6f04ad55c648 SHA-1: 1c0b29da3cb7b83b0d8e616e867e2647b2da830a SHA-256: c100bb2fe96f742677c1ad9e0412e418752d28d9b0478da672e4c15aa4242ea6
82 Risk Score

Malware Insights

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

The PDF document contains a high-severity heuristic indicating it links to a 'free generator / game hack' redirector, specifically pointing to a URL related to Roblox hacks. The document body and embedded URLs reinforce this lure, suggesting the primary goal is to redirect users to potentially malicious websites. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest a phishing or social engineering attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9748

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/hacked-roblox-game-game-hack PDF link annotation
    • http://www.js100.com/uploads/ckeditor/files/coin-master-heaven-links-free-spins_GM406889139.pdfIn PDF document text
    • http://www.js100.com/uploads/ckeditor/files/minecraft-bedrock-server-hosting-free_GM479516143.pdfIn PDF document text
    • http://www.js100.com/uploads/ckeditor/files/how-to-make-robux_GM431946152.pdfIn PDF document text
    • http://www.js100.com/uploads/ckeditor/files/roblox-speed-hack_GM431946152.pdfIn PDF document text
    • http://www.js100.com/uploads/ckeditor/files/coin-master-35-16-hack-apk_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/roblox-t-shirt-free_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/roblox-april-fools-hack_GM431946152.pdfIn PDF document text
    • http://www.js100.com/uploads/ckeditor/files/coin-master-hack-spins-android_GM406889139.pdfIn PDF document text
    • http://www.js100.com/uploads/ckeditor/files/coin-master-attack-block-hack_GM406889139.pdfIn PDF document text
    • http://www.js100.com/uploads/ckeditor/files/hack-to-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://www.js100.com/uploads/ckeditor/files/how-to-get-free-hair-in-roblox_GM431946152.pdfIn PDF document text
    • http://www.js100.com/uploads/ckeditor/files/hacks-para-roblox_GM431946152.pdfIn PDF document text
    • http://www.js100.com/uploads/ckeditor/files/coin-master-app-hack_GM406889139.pdfIn PDF document text
    • http://www.js100.com/uploads/ckeditor/files/reddit-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://www.js100.com/uploads/ckeditor/files/how-to-get-free-spins-on-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://www.js100.com/uploads/ckeditor/files/huskybuscom-free-robux_GM431946152.pdfIn PDF document text
    • http://www.js100.com/uploads/ckeditor/files/free-minecraft-codes-2021_GM479516143.pdfIn PDF document text
    • http://www.js100.com/uploads/ckeditor/files/how-do-we-get-free-robux_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
stream_004_off00005144.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5144 24884 bytes
SHA-256: 21b56ebf8c2bbc7632c5cf5451e5833dba01f4ef5ca12adefcd974fd21a82e20
font_01_sfnt_off00008857.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8857 2824 bytes
SHA-256: 94c1b019735d7e491765340abe50b2897410e2ec65ecf141c08bd9f2220897c4
font_02_sfnt_off00009205.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9205 18616 bytes
SHA-256: 43b97d228c7cd7fd1bba8da0f91b6cd3fc6d824cd96cfd86ffb9da3a0224d155

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