PDF malware analysis — malicious · 9245f512eaa4df53

MALICIOUS

PDF

44.0 KB Created: 2021-06-03 22:12:24 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-24

MD5: 83ec625de2eed746efbcef3df7b35448 SHA-1: 39ca35e3741e36ecb04e8236952e4dfbb838ca64 SHA-256: 9245f512eaa4df53d3f12b651a190ad097f8cb6b344ba0d06aac8135fc9aa6d6

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/406889139/free-coins-and-free-spins-coin-master-2021-game-hack PDF link annotation
- http://www.js100.com/uploads/ckeditor/files/roblox-hack-2021_GM431946152.pdfIn PDF document text
- http://www.js100.com/uploads/ckeditor/files/free-headless-head-roblox_GM431946152.pdfIn PDF document text
- http://www.js100.com/uploads/ckeditor/files/www-coin-master-hack_GM406889139.pdfIn PDF document text
- http://www.js100.com/uploads/ckeditor/files/free-spin-and-coin_GM406889139.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-hack-without-verification-code_GM406889139.pdfIn PDF document text
- http://www.js100.com/uploads/ckeditor/files/coin-master-link-for-spins_GM406889139.pdfIn PDF document text
- http://www.js100.com/uploads/ckeditor/files/coin-master-daily-free-spins-link-march-2021_GM406889139.pdfIn PDF document text
- http://www.js100.com/uploads/ckeditor/files/coin-master-free-spins_GM406889139.pdfIn PDF document text
- http://www.js100.com/uploads/ckeditor/files/minecraft-wurst-hacked-client_GM479516143.pdfIn PDF document text
- http://www.js100.com/uploads/ckeditor/files/how-to-get-free-robux-as-a-kid_GM431946152.pdfIn PDF document text
- http://www.js100.com/uploads/ckeditor/files/coin-master-hack-xyz-download-free_GM406889139.pdfIn PDF document text
- http://www.js100.com/uploads/ckeditor/files/roblox-generator-no-verification_GM431946152.pdfIn PDF document text
- http://www.js100.com/uploads/ckeditor/files/roblox-army-free-robux_GM431946152.pdfIn PDF document text
- http://www.js100.com/uploads/ckeditor/files/get-free-robux-now_GM431946152.pdfIn PDF document text
- http://www.js100.com/uploads/ckeditor/files/coin-master-daily-free-spins-blog_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/minecraft-noob-vs-pro-vs-hacker_GM479516143.pdfIn PDF document text
- http://www.js100.com/uploads/ckeditor/files/adopt-me-roblox-hacks_GM431946152.pdfIn PDF document text
- http://www.js100.com/uploads/ckeditor/files/pokemon-go-free-pokeballs-2021_GM1094591345.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.

Filename	Kind	Source	Size
`stream_004_off00004f05.bin`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x4F05	25260 bytes
SHA-256: `c50c41114b0c0751388b1c7f4c71be1c3f8119889144749b4c298373b99c3c41`
`font_01_sfnt_off0000887f.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x887F	18460 bytes
SHA-256: `871f0cb0a27f8e5dd89901f10b004c29658dd5d4ba968b8e0fec3a5b4bbe6c5a`

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