PDF malware analysis — malicious · c8b4c60293b71e81

MALICIOUS

PDF

46.6 KB Created: 2021-06-03 22:02:25 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-02

MD5: 4e8e83947c2cea1735009ba8fa1921fd SHA-1: 215739b5a42d03ad3c12ed78117ffb8c067c6f91 SHA-256: c8b4c60293b71e8126973aa363ea4556bafaa07e4b08f81aa9c23c3424448713

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 0.9748

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/free-fast-robux-hack-game-hack PDF link annotation
- http://www.js100.com/uploads/ckeditor/files/inappropriate-roblox-games-2021_GM431946152.pdfIn PDF document text
- http://www.js100.com/uploads/ckeditor/files/roblox-hack-com_GM431946152.pdfIn PDF document text
- http://www.js100.com/uploads/ckeditor/files/minecraft-mod-updater_GM479516143.pdfIn PDF document text
- http://www.js100.com/uploads/ckeditor/files/coinmaster-spins_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/roblox-g_GM431946152.pdfIn PDF document text
- http://www.js100.com/uploads/ckeditor/files/old-roblox-accounts-for-free_GM431946152.pdfIn PDF document text
- http://www.js100.com/uploads/ckeditor/files/114-4-hacks_GM479516143.pdfIn PDF document text
- http://www.js100.com/uploads/ckeditor/files/games-that-give-you-free-robux_GM431946152.pdfIn PDF document text
- http://www.js100.com/uploads/ckeditor/files/minecraft-survival-hacks_GM479516143.pdfIn PDF document text
- http://www.js100.com/uploads/ckeditor/files/how-to-get-20210-robux-for-free_GM431946152.pdfIn PDF document text
- http://www.js100.com/uploads/ckeditor/files/coin-master-website_GM406889139.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/coin-master-daily-free-spins-link-today-2021-free_GM406889139.pdfIn PDF document text
- http://www.js100.com/uploads/ckeditor/files/coin-master-free-coins-2021_GM406889139.pdfIn PDF document text
- http://www.js100.com/uploads/ckeditor/files/coin-master-hack-no-human-verification_GM406889139.pdfIn PDF document text
- http://www.js100.com/uploads/ckeditor/files/coin-master-free-daily-rewards_GM406889139.pdfIn PDF document text
- http://www.js100.com/uploads/ckeditor/files/apps-for-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
- http://www.js100.com/uploads/ckeditor/files/robux-free-robux_GM431946152.pdfIn PDF document text
- http://www.js100.com/uploads/ckeditor/files/how-to-block-someone-on-coin-master_GM406889139.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.

Filename	Kind	Source	Size
`stream_004_off00004d51.bin`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x4D51	25488 bytes
SHA-256: `2ac7c8cd9bf7e09bacf7fd37d5edc2c50b67a416aadf3b45d46304a35fd45ada`
`font_01_sfnt_off0000885f.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x885F	2956 bytes
SHA-256: `bab8933fc39dc331bc4c1c904a82b1432ab2e02478fa0a59453c98c5c231da8d`
`font_02_sfnt_off0000927f.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x927F	18516 bytes
SHA-256: `05d18f9df0bf67619a1c83bcf4b53f9bd3fb04259651797d3b0d52743d65f701`

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