PDF malware analysis — malicious · 18d7da446f8e8c79

MALICIOUS

PDF

45.6 KB Created: 2021-06-03 22:01:40 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-05

MD5: 8b2ed245c645a32b864dffd569efb993 SHA-1: c189f30a11519999d0a3429178c2c2b915e65d8b SHA-256: 18d7da446f8e8c7908d0a035f46fab1aa419b20a68f9e3bc3488ebd92dfe14fb

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/robux-2021-game-hack PDF link annotation
- http://www.js100.com/uploads/ckeditor/files/minecraft-pe-hack-client_GM479516143.pdfIn PDF document text
- http://www.js100.com/uploads/ckeditor/files/roblox-land-free-robux_GM431946152.pdfIn PDF document text
- http://www.js100.com/uploads/ckeditor/files/coin-master-free-soins_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-roblox-boy-hair_GM431946152.pdfIn PDF document text
- http://www.js100.com/uploads/ckeditor/files/how-many-levels-are-in-coin-master_GM406889139.pdfIn PDF document text
- http://www.js100.com/uploads/ckeditor/files/coin-master-daily-free-spins-hack_GM406889139.pdfIn PDF document text
- http://www.js100.com/uploads/ckeditor/files/free-minecraft-servers-to-join_GM479516143.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-spins-coin-master-2021_GM406889139.pdfIn PDF document text
- http://www.js100.com/uploads/ckeditor/files/code-free-robux_GM431946152.pdfIn PDF document text
- http://www.js100.com/uploads/ckeditor/files/robux-com-free-robux_GM431946152.pdfIn PDF document text
- http://www.js100.com/uploads/ckeditor/files/coin-master-free-spins-today-daily-links_GM406889139.pdfIn PDF document text
- http://www.js100.com/uploads/ckeditor/files/free-spin-link-coin-master-today_GM406889139.pdfIn PDF document text
- http://www.js100.com/uploads/ckeditor/files/can-lucky-patcher-hack-coin-master_GM406889139.pdfIn PDF document text
- http://www.js100.com/uploads/ckeditor/files/is-minecraft-java-free_GM479516143.pdfIn PDF document text
- http://www.js100.com/uploads/ckeditor/files/how-to-hack-roblox-2021_GM431946152.pdfIn PDF document text
- http://www.js100.com/uploads/ckeditor/files/roblox-com-games-referrer-roblox-player_GM431946152.pdfIn PDF document text
- http://www.js100.com/uploads/ckeditor/files/microsoft-free-robux_GM431946152.pdfIn PDF document text
- http://www.js100.com/uploads/ckeditor/files/how-to-get-coin-master-free-spins-in-email_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.

Filename	Kind	Source	Size
`stream_004_off000051a8.bin`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x51A8	27068 bytes
SHA-256: `516d4417340e50e8accaaa9914130c6af5f370145553d524fd05ed0ba5f89dbd`
`font_01_sfnt_off00008f7c.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x8F7C	18252 bytes
SHA-256: `f22572533f4e8da48e03a48f0d29ce3544a01a0bd2cb3d9374f1b8b189e2707b`

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