PDF malware analysis — malicious · 5616f4aaf104a31b

MALICIOUS

PDF

45.2 KB Created: 2021-06-03 09:41:15 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-18

MD5: a96baeaa83163f687067f1e28b95c01e SHA-1: a995bfced07074e8d94f9def91623fa7a6d43ff7 SHA-256: 5616f4aaf104a31b80bd0a94acea26d566bbbf5740eccc841a2383c82f0afec7

82 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document contains a high-severity heuristic firing for a 'GAME_HACK_REDIRECT_LURE' pointing to the URL 'https://netcdn.online/app/406889139/collect-free-spin-linms-coin-master-game-hack'. This URL, along with other embedded URLs, suggests a phishing or malware distribution attempt disguised as a game hack generator. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

Nyx PDF Classifier malicious score 0.9804

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/collect-free-spin-linms-coin-master-game-hack PDF link annotation
- https://www.stileadda.com/uploaded_files/userfiles/files/coin-master-free-spins-link-download-apk_GM406889139.pdfIn PDF document text
- https://www.stileadda.com/uploaded_files/userfiles/files/easy-how-to-get-free-robux_GM431946152.pdfIn PDF document text
- https://www.stileadda.com/uploaded_files/userfiles/files/how-to-get-free-robux-on-android_GM431946152.pdfIn PDF document text
- https://www.stileadda.com/uploaded_files/userfiles/files/100-free-spins-coin-master_GM406889139.pdfIn PDF document text
- https://www.stileadda.com/uploaded_files/userfiles/files/free-roblox-toy-codes_GM431946152.pdfIn PDF document text
- https://www.stileadda.com/uploaded_files/userfiles/files/free-roblox-executor_GM431946152.pdfIn PDF document text
- https://www.stileadda.com/uploaded_files/userfiles/files/coin-master-free-coins-and-spins-link_GM406889139.pdfIn PDF document text
- https://www.stileadda.com/uploaded_files/userfiles/files/robux-com-free_GM431946152.pdfIn PDF document text
- https://www.stileadda.com/uploaded_files/userfiles/files/roblox-hack-scripts-copy-and-paste_GM431946152.pdfIn PDF document text
- https://www.stileadda.com/uploaded_files/userfiles/files/cheats-coin-master-free_GM406889139.pdfIn PDF document text
- https://www.stileadda.com/uploaded_files/userfiles/files/free-spins-coin-master-android_GM406889139.pdfIn PDF document text
- https://www.stileadda.com/uploaded_files/userfiles/files/pubg-uc-ucuz_GM1330123889.pdfIn PDF document text
- https://www.stileadda.com/uploaded_files/userfiles/files/free-robux-hack-no-human-verification-or-survey_GM431946152.pdfIn PDF document text
- https://www.stileadda.com/uploaded_files/userfiles/files/free-robux-2021-no-verification_GM431946152.pdfIn PDF document text
- https://www.stileadda.com/uploaded_files/userfiles/files/free-robux-without-downloading-anything_GM431946152.pdfIn PDF document text
- https://www.stileadda.com/uploaded_files/userfiles/files/coin-master-free-spin-today_GM406889139.pdfIn PDF document text
- https://www.stileadda.com/uploaded_files/userfiles/files/coin-master-free-spins-daily-2021_GM406889139.pdfIn PDF document text
- https://www.stileadda.com/uploaded_files/userfiles/files/coin-master-spin-hack_GM406889139.pdfIn PDF document text
- https://www.stileadda.com/uploaded_files/userfiles/files/coin-master-free-coins-hack_GM406889139.pdfIn PDF document text
- https://www.stileadda.com/uploaded_files/userfiles/files/hacks-roblox_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.

Filename	Kind	Source	Size
`stream_004_off00004db7.bin`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x4DB7	23988 bytes
SHA-256: `5030295a7f61fb891201b3c7a693985a7400f0bebcb3a967e126f17d1f544ee5`
`font_01_sfnt_off00008437.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x8437	2880 bytes
SHA-256: `10d025f04f706eb71cdda4f99784df1b9ccb52e48080e43095e0398eaef6f132`
`font_02_sfnt_off00008e22.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x8E22	18220 bytes
SHA-256: `6bf005c76973f45a0e0a8f3abab90b6c8e29498ad82e17ae6753f8ebc4fba648`

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