PDF malware analysis — malicious · 78e19b6e4f569983

MALICIOUS

PDF

43.5 KB Created: 2021-05-16 10:06:57 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-24

MD5: f754350a9624bfec5a02f6afa58ed7cc SHA-1: 6cb8550ea155d1c0363ce9df5ba7ba9283b7e656 SHA-256: 78e19b6e4f5699834be73117dbf2c80bece4ec7001bc6a9ecb3817e8fdcdfc52

82 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

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 0.9969

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.xyz/app/406889139/coin-master-free-spins-today-daily-links-game-hack PDF link annotation
- https://www.mjcorporatemall.com/uploaded_files/userfiles/files/free-robux-accounts-2021_GM431946152.pdfIn PDF document text
- https://www.mjcorporatemall.com/uploaded_files/userfiles/files/free-robux-no-generator_GM431946152.pdfIn PDF document text
- https://www.mjcorporatemall.com/uploaded_files/userfiles/files/mcpe-master-coins-hack-download_GM406889139.pdfIn PDF document text
- https://www.mjcorporatemall.com/uploaded_files/userfiles/files/free-robux-exe_GM431946152.pdfIn PDF document text
- https://www.mjcorporatemall.com/uploaded_files/userfiles/files/minecraft-free-app_GM479516143.pdfIn PDF document text
- https://www.mjcorporatemall.com/uploaded_files/userfiles/files/how-to-get-800-robux-for-free_GM431946152.pdfIn PDF document text
- https://www.mjcorporatemall.com/uploaded_files/userfiles/files/robux-hacks-2021_GM431946152.pdfIn PDF document text
- https://www.mjcorporatemall.com/uploaded_files/userfiles/files/play-coin-master-online-free_GM406889139.pdfIn PDF document text
- https://www.mjcorporatemall.com/uploaded_files/userfiles/files/1x1x1x1-roblox-id_GM431946152.pdfIn PDF document text
- https://www.mjcorporatemall.com/uploaded_files/userfiles/files/impact-minecraft-hack_GM479516143.pdfIn PDF document text
- https://www.mjcorporatemall.com/uploaded_files/userfiles/files/minecraft-bedrock-server-hosting-free_GM479516143.pdfIn PDF document text
- https://www.mjcorporatemall.com/uploaded_files/userfiles/files/free-robux-mobile_GM431946152.pdfIn PDF document text
- https://www.mjcorporatemall.com/uploaded_files/userfiles/files/free-robux-com-roblox_GM431946152.pdfIn PDF document text
- https://www.mjcorporatemall.com/uploaded_files/userfiles/files/legit-coin-master-hack_GM406889139.pdfIn PDF document text
- https://www.mjcorporatemall.com/uploaded_files/userfiles/files/hacks-for-roblox-prison-life_GM431946152.pdfIn PDF document text
- https://www.mjcorporatemall.com/uploaded_files/userfiles/files/does-coin-master-hack-work_GM406889139.pdfIn PDF document text
- https://www.mjcorporatemall.com/uploaded_files/userfiles/files/coin-master-hack-mod-apk-unlimited-spins_GM406889139.pdfIn PDF document text
- https://www.mjcorporatemall.com/uploaded_files/userfiles/files/roblox36com-free-robux_GM431946152.pdfIn PDF document text
- https://www.mjcorporatemall.com/uploaded_files/userfiles/files/how-do-you-get-minecraft-for-free_GM479516143.pdfIn PDF document text
- https://www.mjcorporatemall.com/uploaded_files/userfiles/files/free-links-coin-master_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_003_off00004b37.bin`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x4B37	26068 bytes
SHA-256: `3e136317051e909e1993e1f950b574ac901d569bfeb0ae7782c91eb86f89067f`
`font_01_sfnt_off0000867e.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x867E	18652 bytes
SHA-256: `52d597ff4b9023df6b3510b92f87dc1d2329aed0448bc9fa59130058567cb992`

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